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Resolution No. 96742 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 RESOLUTION NO. 9674 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF VERNON APPROVING AND AUTHORIZING THE EXECUTION OF A SERVICES AGREEMENT BY AND BETWEEN THE CITY OF VERNON AND G2 CONSTRUCTION INC. FOR CATCH BASIN CONNECTOR PIPE SCREENS WHEREAS, the City of Vernon (the "City") is a-permittee along with 83 other cities and the County of Los Angeles under a National Pollutant -Discharge Elimination System ("NPDES") Permit issued by the State Water Quality Control Board to minimize the pollutants discharged to the Los Angeles River through our storm drain system; and WHEREAS, one of the methods to control the pollutants is through the issuance of a Trash Total Maximum Daily Load ("Trash TMDL") for various pollutants; and WHEREAS, the Los Angeles Regional Water Quality Control Board; (the `Board") has established a Trash TMDL for an eventual 1000 reduction in trash for all cities that discharge into the Los Angeles River with an initial reduction of 40% by September 2008; and WHEREAS, in April 2007, the County of Los Angeles issued a report of the design, manufacture and installation of catch basin connector pipe screens (the `Screens") that meet the Trash TMDL requirement for full capture of trash; and WHEREAS, the County of Los Angeles used the public bid process to secure the installation of the Screens and awarded a 1contract to G2 Construction Inc. ("G2 Construction") under which the City has the opportunity to secure the installation of the 'Screens at a minimum unit cost; and 2811 WHEREAS, the Director of Community Services & Water has f ' 1 recommended that the Screens be installed in 233 catch basins in 2 Vernon, which represent approximately 400 of the catch basins in the 3 City that have the highest trash volume; and 4 WHEREAS, by memo dated July 21, 2008, the Director of 5 Community Services & Water has recommended that an agreement with G2 6 Construction be approved and executed in order to secure favorable 7 pricing and comply with the Board requirement for the installation of 8 the approved Screens; and 9 WHEREAS, the City Council of the City of Vernon has 10 determined that, pursuant to the provisions of subsection (a) of 11 Section 2.27 of the Vernon City Code, it is in the public interest and 12 necessity to enter into an agreement with G2 Construction, to enhance 13 services provided to the Vernon community. 14 NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE 15 CITY OF VERNON AS FOLLOWS: 16 SECTION 1: The City Council of the City of Vernon hereby 17 finds and determines that the recitals contained hereinabove are true 18 and correct. 19 SECTION 2: The City Council of the City of Vernon hereby 20 approves the Services Agreement with G2 Construction, a copy of which 21 is attached hereto as Exhibit A and incorporated by reference. 22 SECTION 3: The City Council of the City of Vernon hereby 23 authorizes the Mayor or Mayor Pro-Tem to execute said Agreement for, 24 and on behalf of, the City of Vernon and the City Clerk is hereby 25 authorized to' attest thereto. 26 SECTION 4: The City Council of the City of Vernon hereby 27 directs the City Clerk, or her designee, to transmit one fully executed 28 Agreement to: 2 - 1 G2 Construction Inc. Attn: John Alvarado 2 13331 Garden Grove Blvd., Unit H 3 Garden Grove, CA 92843 4 SECTION 5: The City Council of the City of Vernon hereby 5 authorizes the City Administrator, or his designee, to take any action 6 deemed necessary to carry out or to perform such other acts and deeds 7 as may be necessary or convenient to effect the purposes of the 8 Agreement and the transactions therein authorized. 9 SECTION 6: The City Clerk of the City of Vernon shall 10 certify to the passage of this resolution, and thereupon and 11 thereafter the same shall be in full force and effect. 12 APPROVED AND ADOPTED this 4th day of August, 2008. 13 14 �' < 15 Name• Leonis C. alb 16 Title: Mayor 17 18 ATT ST: 19 20 M U LA GIRON, Ci y Clerk 21 22 23 24 25 26 27 28 3 - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 STATE OF CALIFORNIA ) ) ss COUNTY OF LOS ANGELES ) I, MANUELA GIRON, City Clerk of the City of Vernon, do hereby certify that the foregoing Resolution, being Resolution No. 9674, was duly adopted by the City Council of the City of Vernon at a regular meeting of the City Council duly held on Monday, August 4, 2008, and thereafter was duly signed by the Mayor or Mayor Pro-Tem of the City of Vernon. 5 MANUELA GI ON City Clerk (SEAL) - 4 EXHIBIT A SERVICES AGREEMENT This AGREEMENT ("Agreement") is made, entered into and executed in duplicate originals, either copy of which may be considered and used as the original hereof for all purposes, as of this 4t" day of August, 2008, in the City of Vernon, County of Los Angeles, California BY AND BETWEEN CITY OF VERNON, a municipal corporation, hereinafter referred to as the "City" 4305 Santa Fe Avenue Vernon, California 90058 AND G2 Construction Inc., an independent contractor, hereinafter referred to as the "Contractor" 13331 Garden Grove Boulevard, Unit H Garden Grove, California 92843 RECITALS WHEREAS, the City has determined to retain the services of an independent contractor to install two hundred thirty-three (233) catch basin devices to minimize the trash discharged to the Los Angeles River, and WHEREAS, on May 8, 2008, the County of Los Angeles Flood Control District awarded a contract to Contractor, after an open public bid process, for the installation of catch basin devices to minimize the trash discharged to the Los Angeles River, and WHEREAS, the County of Los Angeles Flood Control District bid provides an opportunity for the City to secure the installation of the connector pipe screens at a minimum unit cost for each of the units by "piggybacking" on the County of Los Angeles Flood Control District bid, and WHEREAS, Contractor has prepared a proposal dated April 10, 2008, for the Services, a copy of which is attached hereto as Exhibit A and incorporated by this reference (the "Proposal"); and WHEREAS, Contractor represents that it is qualified and capable of furnishing the labor, materials and expertise necessary to perform the Services that the City requires, as set forth in this Agreement, and is willing to do so on the terms and conditions set forth below; and Page 1 of 19 WHEREAS, the Contractor's cost proposal is acceptable to the City; and WHEREAS, the City desires to enter into an agreement with Contractor to install two hundred thirty-three (233) catch basin devices to minimize the trash discharged to the Los Angeles River, on a contract basis as defined in the terms and conditions set forth below. NOW, THEREFORE, IT IS AGREED AS FOLLOWS: SECTION 1. TERM OF CONTRACT 1.01. This Agreement will become effective on August 4, 2008, and will continue in effect until such time as the two hundred thirty-three (233) catch basin devices are installed and in good working order, or until terminated as provided in this Agreement. SECTION 2. DEFINITION OF TERMS 2.01. Whenever used in the Agreement, the following terms shall mean: A. "Agreement" shall mean that formally executed Agreement or Contract which includes the Contract Documents attached. The Agreement constitutes the entire agreement between the parties relating to its subject matter. B. "City" shall mean the City of Vernon, California, the entity which has executed the Agreement and, where applicable, its affiliated companies, and its officers, directors, employees, representatives and agents. C. "Contractor" shall mean G2 Construction Inc. and, where applicable, its affiliated companies, and its officers, directors, employees, representatives and agents. D. "Contract Documents" shall include any inquiry, invitation to bid, or proposal which may have, but not necessarily, preceded execution of the Agreement, and including the General Provisions and all exhibits and schedules attached to the Agreement and all plans and specifications identified in the Contract Documents. Page 2 of 19 E. "Contract Price" shall mean the compensation set forth or provided for in Section' 4.01 of this Agreement. Whether it expressly provides for the reimbursement of costs incurred by Contractor or simply for the payment of a lump sum of money, it is intended to be the full and complete payment for satisfactory completion of the Work and, unless otherwise stated, to cover all costs whether for materials, equipment, tools, labor, services and taxes and all overhead, rentals and profit or fee, if any. F. "General Provisions" or "General Conditions" shall mean the General Provisions as set forth in this Agreement. G. "Premises" shall mean the physical premises under City's control or ownership where Work hereunder is to be performed. H. "Proprietary Information" and "Confidential Information" shall mean all information, whether written or oral, which Contractor acquires from, through or on behalf of City, directly or indirectly, or which arises out of the Work,, -concerning the Work or proprietary processes involved in the Work including, without limitation, information concerning past, present or future business plans of City, information about the operations of City's Premises, and other City information or know-how obtained during the Work, except information falling into any of the following categories: Information which, at the time of disclosure hereunder, is in the public domain; 2. Information which, after disclosure hereunder, enters the public domain, except where such entry is the result of Contractor's or any entity within Contractor's control breach of this Agreement; 3. Information which, prior to disclosure hereunder, was already in Contractor's possession without limitation regarding disclosure to others; or 4. Information which, subsequent to disclosure hereunder, is obtained by Contractor from a third party who is lawfully in possession of such information and not subject to a contractual or fiduciary relationship to City with respect to said information and who does not require Contractor to agree to refrain from disclosing such information to others. Page 3 of 19 "Subcontractor" shall mean any first or lower -tier subcontractor and its employees, representatives, agents, subcontractors or other personnel who have been approved in the manner required by this Agreement. J. "Work" or "Services" shall mean the work performed by Contractor and required to be performed from time to time by City under this Agreement. SECTION 3. SERVICES TO BE PERFORMED BY CONTRACTOR Specific Services 3.01. Contractor's Services shall include, but will not be limited to, installation of two hundred thirty-three (233) catch basin devices to minimize the trash discharged to the Los Angeles River. The Contractor's Services are more specifically detailed in the Proposal attached hereto as Exhibit "A" and incorporated herein by this reference. Change of Services 3.02. City may at any time, by written change order executed by the City, make changes only to extend the Work duration and total compensation of Contractor's Work. Changes in the scope of Work, or duties and obligations, shall be authorized only by the City. 3.03. City may make "Changes" by increasing, reducing or deviating from the requirements of the scope of Work. A form of Change Order is set forth in Exhibit B attached hereto and incorporated by reference. Timing of Services 3.04. Contractor's Services shall commence upon the execution of this Agreement by both parties and award by the City Council of the City and shall end at such time as the installation of the two hundred thirty-three (233) catch basin devices within the City is completed and such equipment is in good working order, unless this Agreement is otherwise terminated according to Section 6 of this Agreement or extended according to the conditions and terms set forth in this Agreement. 3.05. Time is of the essence for all Work contemplated by this Agreement. Contractor shall start performing Services under this Agreement only after notification by the City. Page 4 of 19 Method of Performing Services 3.06. Contractor will determine and is responsible for the method, details, and means of performing the above -described Services. Status of Contractor 3.07. Contractor enters into this Agreement, and will remain throughout the term of this Agreement, as an independent contractor. Contractor agrees that it is not and will not become an employee, partner, agent, or principal of City while this Agreement is in effect. Contractor agrees it is not entitled to the rights or benefits afforded to City's employees, including disability or unemployment insurance, workers' compensation, medical insurance, sick leave, or any other employment benefit. , Contractor is responsible for providing, at its own expense, disability, unemployment, and other insurance, worker's compensation, training, permits, and licenses for itself and for its employees and subcontractors. Contractor shall have complete and sole control over its employees, the details of the Services and methods by which the Services are accomplished, it being understood that City is interested only in the results to be obtained by Contractor. 3.08. Contractor has no authority to enter contracts or agreements on behalf of City. This Agreement does not create a partnership or joint venture between the parties. Payment of Taxes 3.09. Contractor is responsible for paying when due all income taxes, including estimated taxes, incurred as a result of the compensation paid by City to the Contractor for Services under this Agreement. Contractor agrees to indemnify City for any claims, costs, losses, fees, penalties, interest, or damages suffered by City resulting from Contractor's failure to comply with this provision. 3.10. Payroll taxes including federal, state and local taxes shall not be withheld or paid by City on behalf of Contractor or for the employees of the Contractor. Contractor shall not be treated as an employee with respect to the Services performed hereunder for federal or state tax purposes. Contractor shall be responsible to pay taxes mandated by law. 3.11. Since Contractor is not an employee of City, Contractor is not eligible for and shall not participate in any employee benefit of City, including pension, health or other fringe benefits. Page 5 of 19 SECTION 4. COMPENSATION 4.01 In consideration for the Services to be performed by Contractor, described in Section 3 of this Agreement, City agrees to pay Contractor the amounts specified in the Contractor's proposal (the "Contract Price"). The Contract Price shall not exceed Two Hundred Six Thousand Two Hundred Five and no/100 Dollars ($206,205.00) plus any applicable taxes. Entire Compensation 4.02. The Contract Price is full and complete compensation, and constitutes the entire compensation due Contractor for the Services and any and all of Contractor's obligations hereunder. The Contract Price set forth above is not subject to escalation for any reason except as expressly set forth in this Agreement. No adjustments in compensation shall be made as a result of changes in the value of any currency. The Contract Price shall only be adjusted by formal, written Change Order or amendment to this Agreement. Payment of Compensation 4.03. For Services rendered under Section 3 of this Agreement, Contractor shall be entitled to receive monthly payments. Contractor shall submit to City a monthly invoice and statement of Services, prepared in accordance with City requirements, by the fifteenth (15t") of each month, for the prior calendar month's completed Work. City will make payments to Contractor within thirty (30) days after acceptance and approval of the invoice received from Contractor. 4.04. Contractor shall be responsible for paying any subcontractors used in the performance of this Agreement. Subcontractors shall not bill the City directly. Expenses 4.05. City shall not be liable to Contractor for any expenses paid or incurred by Contractor. Expenses may only be billed if advance written approval has been obtained from the Executive Director. Compensation for Changes 4.06. The compensation due Contractor, or the credit due City, for changes may not be established verbally, and shall be established in a written change order signed by City as described in Sections 3.02 and 3.03 of this Agreement. Compensation adjustments in each such change order shall be established by one or more of the following bases, as determined by City: (a) a lump sum price to be negotiated Page 6 of 19 between the parties; or (b) Work unit rates to be negotiated between the parties. Once established, the amount of the compensation due Contractor or credit due City for a change shall not be subject to adjustment for any reason, including changes in the value of any currency. SECTION 5. OBLIGATIONS OF THE PARTIES 5.01. Contractor is responsible for meeting all conditions of this Agreement and, City Standards & Details for all Work performed. Substandard Work, as determined solely by the City, shall be redone at the expense of the Contractor. Products of Consulting 5.02. All products of consulting services including, but not limited to, manuals, documents and/or computer software, shall become the property of the City and shall be delivered to the City before the end of the performance of this Agreement. Basic notes and sketches, charts, computations and other data shall be made available to City without restriction or limitation on their use. Liability Insurance 5.03. Contractor and its subcontractor(s), if any, shall, prior to commencement of any Work and for the duration of this Agreement, obtain and maintain at its own expense, those minimum levels of insurance coverage as set forth below. Prior to commencing Work hereunder, Contractor shall provide the City with proof of insurance providing and maintaining the coverages and endorsements set forth below. Said proof of insurance shall also provide that said policy or policies shall not be canceled or materially reduced in coverage without giving at least thirty (30) days prior written notice to the City. 5.04. The insurance coverage as listed herein, shall be properly endorsed to include those contractual obligations which may be identified further within this Agreement and shall be endorsed to provide City all the rights and privileges of an additional insured. 5.05. Contractor shall cause its insurers to issue, including but not limited to, Certificates of Insurance or, upon request, certified copies of the insurance policies evidencing that the coverages and policy endorsements required under this Agreement, are maintained in force. 5.06. Contractor shall ensure its subcontractor(s), if any, maintain those insurance requirements as specified in this Agreement and are endorsed as additional Page 7 of 19 insured(s) on all required Contractor insurance coverages. Contractor and its subcontractor(s), if any, shall maintain in effect the following minimum insurance coverages on -an Occurrence Form Policy: Workers Compensation within the statutory limits, including occupational illness or disease coverage in accordance with the laws of the nation, state, territory, or province exercising jurisdiction over Contractor's employees. Workers Compensation and Employers Liability Insurance shall have a minimum limit of $1,000,000 per occurrence. Contractor further agrees to hold harmless and indemnify City for any and all claims arising out of an injury, disability, or death of any of Contractor's employees or agents. 2. Comprehensive General Liability Insurance, including, but not limited to, Contractual Liability, Products and Completed Operations Liability, Broad Form Property Damage and Bodily Injury Liability, and Explosion, Collapse and Underground Liability, with a minimum combined single limit of $2,000,000 per occurrence. 3. Comprehensive Automobile Insurance, including, but not limited to, all owned, non -owned or hired vehicles with a minimum combined single limit of $1,000,000 per occurrence for bodily injury and property damage. 4. Excess Liability Insurance with limits of $2,000,000. Such evidence of insurance can either be through the primary insurance coverages or through an excess policy. Such insurance shall at all times be on an occurrence form and provide policy conditions as broad as those required in the primary'insurance. 5.07. Contractor agrees to provide insurance in the amounts and forms specified above. Contractor shall submit to the City documentation indicating compliance with these minimum requirements no less than one (1) day prior to the beginning of performance under this Agreement. Contractor shall not commence performance of its Work under this Agreement until the above insurance has been obtained and proof of insurance has been filed with and approved by the City. 5.08. Contractor shall not permit a subcontractor or vendor to perform work on City premises unless and until a certificate of insurance is obtained showing that such subcontractor or vendor has worker's compensation coverage. If Contractor employs subcontractors as part of the Services rendered, Contractor's protective Page 8 of 19 coverage is required. Contractor may include all subcontractors as insureds under its own policy or shall furriish separate insurance for each subcontractor, meeting the requirements set forth above. Representations 5.09. To the fullest extent permitted by law, Contractor shall defend, indemnify and hold harmless City and its elected officials, officers, agents and employees from all claims, suits, actions, demands, damages, liabilities, expenses, judgments, settlements, and penalties, losses, fines, and all costs and expenses incurred in connection therewith, including reasonable attorney's fees and all costs of defense, arising out of or attributable to the negligent or wrongful acts of Contractor or its employees or agents under this Agreement, except to the extent arising from or caused by the sole negligence or willful misconduct of the City, its officers, agents or employees. The terms of this indemnity shall survive the termination of this Agreement. The obligations in this Paragraph are in addition to Contractor's duty to provide insurance and shall not be limited by any limitation on the amount or type of insurance coverage carried by Contractor. 5.10. Contractor and City represent that each has read and understands the Agreement and Contract Documents. The Contractor represents it understands the City's regulations concerning Premises access, badges, parking, security, safety, fire, prohibited drugs and alcohol, and smoking and other rules, and that Contractor has visited Premises where the Work is to be done and is familiar with the local conditions under which it is to be done. Contractor also represents that it is experienced in performing and competent and qualified to perform the kind of tasks or assignments included in the Work and employs or has available for employment in sufficient numbers all unskilled, skilled, administrative, supervisory, professional and managerial or other personnel required to perform the Work as required by this Agreement. 5.11. Contractor represents that it has the qualifications and skills necessary to perform the Services under this Agreement in a competent, professional manner, without the advice or direction of City. This means Contractor is able to fulfill the requirements of this Agreement. Failure to perform all the Services required under this Agreement constitutes a material breach of the Agreement. Contractor has complete and sole discretion for the manner in which the Work under this Agreement will be performed. 5.12. Contractor declares and states that is has complied with and will continue to comply with all federal, state and local laws regarding business permits and licenses that may be required to carry out the Services to be performed under this Agreement. Page 9 of 19 5.13. Contractor agrees to indemnify, defend, and hold City free and harmless from all claims, demands, losses, costs, expenses, obligations, liabilities, damages, recoveries and deficiencies, including interest, penalties, attorney's fees and costs, that City may incur as a result of a breach by Contractor of any representation or provision contained in this Agreement or any negligent or intentional acts or omissions by Contractor, it subcontractors, agents, and employees or based on any claim that any software program or other product used or furnished by Contractor in the performance of this Agreement constitutes an infringement of any United States patent or copyright. 5.14. Contractor's rights under this Agreement may not be assigned nor may its duties be delegated or subcontracted without the prior written consent of City. Any assignment or delegation or subcontract in violation of this Section shall, at City's sole discretion, be void. Consent by City shall not relieve Contractor of responsibility for performance of Contractor's obligations hereunder. City may assign all or any part of this Agreement at any time effective immediately upon written notification to Contractor. 5.15. At all times while Work is being performed on the Premises each party shall be represented thereon by a designated representative. Each party may notify the other in writing of the identity of such persons from time to time. Work Injury 5.16. The treatment and care of injuries sustained by Contractor's employees, subcontractors, representatives or other personnel shall be and remain the responsibility of Contractor. City's first aid facilities, if any, however, will be made available to Contractor's employees in emergency cases which are the direct result of accidents occurring on the Premises. City shall incur no liability for, and Contractor hereby agrees to indemnify City against, any causes of action, claim, liability or costs, including attorney's fees, arising in whole or part out of the furnishing of such first aid facilities or assistance to Contractor's employees, subcontractors, representatives or other personnel, or out of the failure to furnish such facilities or assistance. Records, Inspection and Audit 5.17. During the course of Work being performed, Contractor and any of its subcontractors, shall maintain and retain, not less than three (3) years after completion thereof; complete and accurate records of the Contractor's costs which are chargeable to the City under this Agreement. City or its designated, authorized representatives, shall have the right during this three (3) year period, Page 10 of 19 upon written reasonable notice, to inspect and audit those records. Such records to be maintained and retained by the Contractor shall include: (a) payroll record accounting for the total time distribution of the Contractor's employees working full or part time on the Work (to permit tracing to payroll payments in cash); (b) invoices for purchases, receiving and issuing documents, and all the other unit - inventory records for the Contractor's stores, stock or capital items; (c) paid invoices and canceled checks for material purchased and for the subcontractor's and any other third parties' charges; and (d) any other documentation City deems necessary to support costs and charges under this Agreement. Corporate Conduct 5.18. Contractor, its employees, agents or representatives shall not offer or give to an officer, official or employee of City gifts, entertainment, payments, loans or other gratuities to influence the award of a contract or obtain favorable treatment under this Agreement or any other contract. Standard of Care 5.19. Contractor agrees that all Services provided will be conducted by the principal and competent staff members, if any, under the supervision of the principal, and that Services will be performed and rendered diligently. Contractor represents that it has, or shall secure, at its own expense, all personnel required to perform Contractor's Services under this Agreement, but at all times shall be responsible for the Services of such personnel. Contractor may not employ any subcontractor without the prior written approval of the City. Indemnity Process 5.20. The City shall notify Contractor in writing of any suits, claims or demands covered by any indemnity contained in this Agreement. Promptly after receipt of such notice, Contractor shall assume the defense of such claim with counsel reasonably satisfactory to City. If Contractor fails, within a reasonable time after receipt of such notice, to assume the defense with counsel reasonably satisfactory to City, or if, in the reasonable judgment of City, a direct or indirect conflict of interest exists between the parties with respect to the claim, or if in the sole judgment of City the assumption and conduct of the defense by Contractor would materially and adversely affect City in any manner or prejudice its ability to conduct a successful defense, then the City shall have the right to undertake the defense, compromise and settlement of such claim for the account and at the expense of Contractor. Notwithstanding the above, if the City in its sole discretion so elects, City may also participate in the defense of such actions by employing counsel at its expense, without waiving the Contractor's obligations to Page 11 of 19 indemnify or defend. Contractor shall not settle or compromise any claim or consent to the entry of any judgment without the prior written consent of the City and without an unconditional release of all liability by each claimant or plaintiff to the City. Treatment of Confidential and Proprietary Information 5.21. For ten (10) years after the effective date of this Agreement, Contractor shall refrain from using any Confidential or Proprietary Information except in connection with -the Work or from disclosing it to any third party other than to employees of Contractor who require it in performance of the Work and except to such other third persons as City may authorize in writing. If disclosure to such an employee or to other third persons is so authorized, Contractor shall enter into with said party a confidentiality agreement containing provisions with respect to use and disclosure of Proprietary Information substantially the same as those contained in this Agreement. 5.22. Contractor shall take reasonable precautions to safeguard any documents containing Proprietary Information which City may supply to Contractor hereunder. Contractor may copy, in whole or part, such documents to the extent necessary for the performance of the Work, and Contractor shall return to City upon the completion of the Work or request by City all such documents and copies. 5.23. Except as- expressly permitted by prior written consent of the City, Contractor and/or its subcontractors shall not disclose, permit the disclosure of, release, disseminate, or transfer, whether orally or by any other means, any part of such Confidential Information to any other person or entity. Contractor and/or its subcontractors shall return any written Confidential Information and all copies made of such items to the City upon the City's written request, but in any event not later than the date that Contractor has performed all Work to be performed pursuant to this Agreement. Contractor hereby agrees that such Confidential Information and any documents provided may be used by Contractor and/or its subcontractors only as authorized by the City. Contractor shall include a provision in its agreements with subcontractors that binds the subcontractors to this non -disclosure requirement. 5.24. All reports, plans, data, studies, maps, drawings, models, photographs, documents and other writings prepared by and for Contractor, its officers, employees, agents and subcontractors in the course of implementing this Agreement, with the exception of working notes, internal documents and Confidential Information provided by businesses located in City, shall be considered the property of City. Contractor shall deliver such documents and Page 12 of 19 materials to the City as they are generated; however, Contractor may take and retain copies of said documents and materials that are not Confidential Information, as desired. 5.25. All reports, information, data and exhibits prepared or assembled by Contractor in connection with the performance of its Services pursuant to this Agreement are confidential until released by the City to the public and Contractor agrees that such documents shall not be available to any individual or organization without the written consent of the City prior to such release. 5.26. No reports, maps, or other documents produced in whole or in part under this Agreement shall be the subject of an application for copyright by or on behalf of Contractor. Compliance with Authority 5.27. Contractor shall comply with all laws, regulations, executive orders and other applicable requirements of any governmental agencies having jurisdiction including the Fair labor Standards Act, the Occupational Safety and Health Act and all those relating in any way to employment .practices and protection of the environment. Contractor shall not discriminate against any employee or any applicant for employment for reasons of race, color, creed, religion, sex, sexual preference, age or national origin. 5.28. Contractor shall make timely payment of all employment taxes and of all social security and other contributions of every kind required to be made with respect to or measured by the wages and salaries of persons employed by Contractor. 5.29. Contractor shall indemnify City against, and hold City harmless from, any liability or loss including liability or loss from fines or penalties arising out of Contractor's failure to perform the obligations imposed upon it by Sections 5.2 and 5.28 of the Agreement. Progress Reports 5.30. Contractor shall meet with City staff, upon City's request, or as needed, in order to provide reports or information concerning the Services being performed by Contractor under this Agreement. Contractor's License Classification 5.31. Contractor shall possess all appropriate licenses for the duration of this Agreement. Page 13 of 19 SECTION 6. TERMINATION OF AGREEMENT 6.01. Unless otherwise terminated as provided in this Section, this Agreement will continue in effect until such time as the installation of the two hundred thirty three (233) catch basin devices, is complete and such equipment is in good working order, unless otherwise extended according to the terms and conditions set forth in this Agreement. Non -Default Termination 6.02. City, at its sole discretion, may terminate this Agreement upon thirty (30) days written notice to Contractor and such termination shall be effective in the manner specified in such notice and shall be without prejudice to any claim that either party may have against the other. During the thirty (30) day period after such notice is sent, the parties shall continue to act toward each other in good faith. 6.03. In the event of any such termination, in full and complete settlement for the termination of the Work, City shall pay Contractor for those Services performed prior to the date of delivery of the termination notice, plus compensation for (i) necessary Work performed during the notice period and authorized in the termination notice, and (ii) all costs reasonably and necessarily incurred by Contractor directly attributable to termination which could not reasonably have been avoided and for which Contractor is not otherwise compensated that are incurred through the date of termination and effectuating the termination ("Termination Expenses"). Termination Expenses shall not include lost profits, lost opportunities, consequential damages, or the like. In no event shall total payment exceed the Contract Price. Termination on Occurrence of Stated Events 6.04. This Agreement will terminate automatically on the occurrence of any of the following events: A. Bankruptcy or insolvency of either party; or B. Sale of the Contractor; or C. Assignment of this Agreement by Contractor without City's written consent. Page 14 of 19 Termination for Default 6.05. If Contractor defaults in the performance of this Agreement or materially breaches any of its provisions, City may immediately terminate this Agreement by giving written notification to Contractor indicating the effective date of such termination. Termination will take effect immediately upon the date specified in the notification. For the purposes of this paragraph, material breach of this Agreement includes, but is not limited to, the following: A. Contractor's failure to perform, in a manner satisfactory to the City in its sole discretion, the Services specified in Section 3 of this Agreement; or B. Contractor's material breach of any obligation or provision contained in Section 5 of this Agreement. 6.06. The waiver by either party of a breach or default by the other party shall not be deemed a waiver of any different or later breach; nor shall any delay or omission by either party to exercise any right it may have hereunder operate as a waiver of any breach or default of such a right. The failure of either party to this Agreement to exercise any of its rights under this Agreement does not constitute a breach thereof and shall not be deemed to be a waiver of such rights or a waiver of any subsequent breach. 6.07. In the event of any termination of this Agreement or reduction in the scope of the Work, Contractor shall not be entitled to damages for loss of profits for the unexecuted portion of the Work or any other damages because of such termination or reduction. SECTION 7. GENERAL PROVISIONS Notices 7.01. All notices, approvals, consents and other communications between the parties shall be in writing, and shall be sent by fax or by certified mail (return receipt requested) to the respective addresses set forth below, or at such other address as may be furnished by either party to the other in writing. Faxed notices, confirmed by copy thereof, shall be deemed communicated as of the day the facsimile was sent. Mailed notices will be deemed communicated as of the day of receipt or the third (3rd) day after mailing, whichever occurs first. Page 15 of 19 Contractor G2 Construction Attn: John Alvarado 13331 Garden Grove Blvd., Unit H Garden Grove, CA 92843 Fax: 714-748-4244 Telephone: 714-448-8080 City — City of Vernon Attn: City Administrator 4305 Santa Fe Avenue Vernon, CA 90058 Fax: 323-826-1438 Telephone: 323-583-8811 Entire Agreement of the Parties 7.02. This Agreement supersedes any and all agreements, either oral or written, between the parties with respect to the rendering of Services by Contractor for City and contains all of the representations, covenants, and agreements between the parties with respect to the subject matter of this Agreement and the rendering of those Services. Each party to this Agreement acknowledges that no representations, inducements, promises, or agreements, orally or otherwise, have been made by any party, or anyone acting on behalf of any party, which are not contained in this Agreement, and that no other agreement, statement, or promise not contained in this Agreement or a subsequent amendment or change order shall be valid or binding. No amendment or change in the provisions of this Agreement shall be made, except in a formal written amendment signed by Contractor and an authorized representative of the City, or in a written change order. Contractor expressly waives all claims for compensation based upon quantum merit, implied contract or oral contract. Each party represents and warrants that it has read and fully familiarized itself with this Agreement, and that such party has been fully authorized to sign this Agreement. 7.03. This Agreement shall be comprised of these included provisions, together with Exhibits A and B, which are all attached. In the event of conflict between this Agreement and any of the exhibits, including the Proposal, this Agreement shall prevail. Partial Invalidity 7.04. If any provision of this Agreement is held by a court of competent jurisdiction to be invalid, void, or unenforceable, the remaining provisions will continue in full force and effect without being impaired or invalidated in any way. Page 16 of 19 Law and Arbitration 7.05. All disputes arising out of or related to this Agreement, the conduct of either party in connection with this Agreement, and the relationship and rights of the parties in connection with this Agreement, whether characterized as breach of contract, tort, or otherwise (except for those requesting injunctive relief) shall be determined by binding arbitration in accordance with the terms of this Section. The submittal of all matters to arbitration in accordance with the terms of this Section is the sole and exclusive method, means and procedure to resolve any and all claims, disputes or disagreements arising under this Agreement, except for claims by either party which seek injunctive relief, which claims shall be resolved by suit filed in the Superior Court of Los Angeles County, California, the decision of which court shall be subject to appeal pursuant to applicable law. The parties hereby irrevocably waive any and all rights to the contrary and shall at all times conduct themselves in accordance with the terms of this Section, relying on arbitration as the sole means of resolution of disputes. Arbitration of all matters required to be arbitrated hereunder shall take place before a panel of three retired judges of the Superior Court of the State of California (the "Arbitrators") under the auspices of Judicial Arbitration & Mediation Services, Inc. ("JAMS"). Such arbitration shall be initiated by the parties, or either of them, within ten (10) calendar days after either party sends notice of a demand to arbitrate (the "Arbitration Notice") to the other party and to JAMS. The Arbitration Notice shall contain a description of the subject matter of the arbitration, the dispute with respect thereto, the amount involved, if any, and the remedy or determination sought. Each party shall select a retired judge from the JAMS panel, and the two selected judges shall mutually agree on the third retired judge from the JAMS panel. If one of the parties does not select a retired judge from the JAMS panel within fourteen (14) calendar days after receipt of the Arbitration Notice, JAMS will select the second judge, and the judge selected by JAMS and the judge selected by the other party will select the third judge for the panel. The third judge is to be selected within ten (10) calendar days following the selection of the first two judges. The three judges will together serve as the Arbitrators. The arbitration shall be conducted in Los Angeles, California. Any party may be represented by counsel and/or other authorized representative. In rendering a decision(s), the Arbitrators shall determine the rights and obligations of the parties according to the substantive and procedural laws of the State of California and the terms of this Agreement. The decision of the Arbitrators shall be based on the evidence introduced at the hearing and accompanied by a written statement of decision as to each of the principal controverted issues. The agreement of two of the three Arbitrators as to the resolution of the dispute shall be a conclusive resolution. The Arbitrators shall deliver the written decision to the parties within thirty (30) calendar days following the date of the selection of the last of the Arbitrators. The decision shall be conclusive and binding, and it Page 17 of 19 may thereafter be confirmed as a judgment by the Superior Court of the State of California, subject only to challenge on the grounds set forth in the California Code of Civil Procedure Section 1286.2. The validity and enforceability of the decision of the Arbitrators is to be determined exclusively by the California courts. Attorney's Fees 7.06. In the event a dispute, claim or litigation arises regarding this Agreement, the prevailing party shall be entitled to reimbursement for reasonable attorneys' fees and actual costs, which may be set by the arbitrators or the court in the same action or in a separate action brought for that purpose, in addition to any other relief which is obtained. 7.07. Neither party shall be considered in default in any of its obligations under this Agreement when a failure of performance shall be due to an uncontrollable force. The term "uncontrollable force" shall mean any cause beyond the control of the party affected, including, but not restricted to, flood, earthquake, storm, fire, lightning, epidemic, war, riot, civil disturbance or disobedience, federal, state, or municipal action, statute, ordinance, or regulation, embargoes of the United States Government or any other government, which by exercise of due diligence such party could not reasonably have been expected to avoid and by exercise of due diligence has been unable to overcome. Either party rendered unable to fulfill any of its obligations under this Agreement by reason of an uncontrollable force shall give written notice within five (5) business days of such fact to the other party and shall exercise due diligence to remove such inability with all reasonable dispatch. 7.08. Except as may otherwise be specifically provided herein, this Agreement may be modified or amended only by a written document executed by both Contractor and the City and approved as to form by the City's City Attorney. 7.09. The captions used in this Agreement are for convenience only and shall in no way define, limit or describe the scope or intent of the Agreement or any part thereof. Page 18 of 19 7.10. City reserves the right to award similar contracts to multiple contractors to ensure the City has adequate services. IN WITNESS WHEREOF, the parties have executed the Agreement on the dates shown below. City: City of Vernon Name: Leonis C. Malburg, Mayor Date: APPROVED AS TO FORM: Jeff A. Harrison, City Attorney Contractor: G2 Construction Inc. o / %w &/ �\ Date: ATTEST: Manuela Giron, City Clerk Name: V49-L-w� Title: Date: Page 19 of 19 G2 Construction Inc. State contractors license #801263 - A, C8, C60 13331 Garden Grove Blvd. unit H Garden Grove, CA 92843 Proposal - "Collector Pipe Screens" Customer: City of Vernon Prepared: 4/10/2008 4305 santa fe Ave. Vernon, CA 90085 By: John Alvarado Phone: 323-583-8811 Phone: 714.448.8080 Fax 323-826-1435 ialvaradoAg2construction com Contact: Mr. Sherwood Natsuhara P.E. Project Location: Various locations in Vernon G2 Proposes to install "Collector Pipe Screens" per L.A. County Public Works design. The units will be constructed of Stainless Steel 5mm perforated material. The units will be installed in various sizes and shapes according to individual catch basin locations Upon receiving a list of target locations - G2 will provide a preliminary report and photographs of before and after on all locations. All locations will be confirmed or addressed with Vernon Public Works prior to work commencing. Quantity Unit Price Extended 1). Collector Pipe Screens 233 ea. $ 885.00 $ 206,205.00 Covers sizes -18" to 48" discharge pipes Project Price $ 206,206.00 Notes; G2 will provide all required labor, materials and hardware to complete the CPS project. All catch basins to be cleaned prior to installations Traffic Control lane closures will be on a time and equipment basis. Any special required fees and permits may be additional. Purchase Order # Purchase Order Amount Authorized Signature: Date: Fax signed proposal to 714-748-4244 NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 0� 9th St 123 49 34 12 Front / Side Straight 9th St. 132 60 36 I lFront / Middle Rounded 9th St. lFront / Side Straight �® 9th St. lFront / Side Straight 00 9th St. 132 49 48 18 Front / Middle Rounded 0© 9th St. lFront / Middle Rounded 00 9th St. lFront / Middle Rounded �® 9th St. 131 50 48 12 Front / SideJ EStraiK 00 9th St. 132 48 53 18 Front / Middle Sloped Rounded 1� 10 9th St 132 60 43 12 Front / Side-7 I Shelf Rounded 0 12 9th St. E1E lFront / Side Sloped Straight 13 9th St. 136 51 31 12 Front / Side Straight 15 9th St. 50 131 39 12 Front /Side Straight 16 9th St. lFront / "Side- Straight 17 9th St. 131 50 33 12 Front / Side Straight 18 9th St. 177 50 30 12 Front / Side-7 I IStraight EIU 151 st St. lFront / Middle Rounded EEI 151 st St. 180 45 MET] Front / Middle Rounded = 151 st St. 132 46 55 12 Front / Middle Rounded EKI 151st St. E121 lFront / Middle Rounded =EM151 st St. 135 E46 39 E1E JFront / Middle Rounded 24 51st St. 184 46EEI =lFront / Middle ] r— M 151 st St. 180 46 38 12 Front / Middle Rounded ml 151 st St. lFront / Middle Rounded 0 27 52nd St. 180 48 38 J lFront / Side Rounded M 152nd St. 192 48 40 12 Front / Side Rounded NEW CATCH BASIN DATA SHEET New Section CB No. Location Length Width Depth Lateral Size Lateral Floor Connection Configuration Screen Style [EF-2--9-1152nd St. JlFront / Side Straight 30 1152nd St. 132 L 6]E]E 117ront / Side Rounded 31 52nd St. JlFront / Side Rounded 32 52nd St. JlFront / Side IRounded 33 52nd St. ____j LIL2J 48 J Front / Middle Rounded 35 52nd St. j 180 lFront / Side Straight L_LjU 52nd St. I LIL8J45 1141 M lFront / Side Sloped j I Rounded U 37 52nd St. ==1 = 33 = JlFront / Side Rounded =EH1152nd St.IEEI 39 12 Front / Side Straight 1� 39 52nd St. 264 48 38 12 Front / Side Rounded 0 42 57th St. 180 44 60 14 Back /Side Rounded . Santa Fe Ave. lFront FRoundedl 2 4 - Santa -Fe Ave. 264 45 rr30 12 Front / :Middle >' Rounded ]Santa Fe Ave. 96 45 28 12 Front /'Side ' Rounded [==lSanta 'Fe Ave. 132 46 44__j 12 Front /Middle ' Rounded 00 Pacific at Santa Fe Ave 94 44 32 ® lFront / Side Rounded 00 ernon Ave. e/o Santa 72 41 38 ® Front / Side Straight 00 2850 Vernon Ave. 127 EKI EKI12 Front / Middle Rounded 00 Soto St. s/o Vernon 60 44 62 12,8,8 Side / Midle Rounded �® Soto St. e/o Vernon JFront / Side Sloped Straight 00Vernon Ave. at Soto 100 48 54 12 Front /Middle Rounded 0 11 ernon Ave. at Seville 101 44 48 12 Front / Middle Rounded 0 13 r37th e/o Seville 170 38EKI Front / Side Rounded 0 14 37th w/o Soto 130 44 42 0 Front / Corner Straight M 137th e/0 Soto EEI E!2:]Front / Mid dle Rounded MEE137th e/o Soto EHI EIEFront / Middle I LRounded] 17 Seville at 37th 117ront / Middle Rounded NEW CATCH BASIN DATA SHEET New Section CB No. Location Length 96 Width 48l Depth Lateral Size Lateral Connection lFront / Middle Floor Configuration Screen Style Rounded 0 18 Seville s/o 37th 0 20 ernon Ave. e/o Santa IEKIF 44 65 ® IFront / Middle I Rounded 21 ernon Ave. w/o Santa ERJ ® Front / Corner IF- MEMIln front of City Hall 178 IFront / Side I Rounded 0 24 Santa Fe Ave / west 96 44 29 ® Front / Middle Rounded 0 25 ernon Ave. at Furlong 96] Ej2j ISide / Midle= I Straight ®0 38th at Irving I48 48 48 ® lFront / Middle IRounded Ej] M 138th at Irving 48 48 72 ® Side / Midle IRounded ®® 38th at Irving 96 48 62 = IFront / Side IStraight ®© Irving 96 18 41 15 Front / Middle Rounded ®= Irvin.g IFront/ Middle Rounded -®®.38th.,at Irving 60 48 34 ® Side / Midle IRounded 01 A ''J._38th a/o'Santa Fe '96 44 52`DE ISide / Mid]!L''j IRounded 37'e/o Santa Fe 13248 34' ° 12 Front /Side ; `Sloped Straight 37th e/o Santa fe 132` 46 38 12 Front / `Side Straight 00 37th e/0 Santa Fe lFront / Side Straight M ©37th at Soto 96 48 36] IFront / Middle j IRounded M5 0 37th e/o Santa Fe. lFront / Middle I IRounded ©� 26th St. e/o Santa Fe 99 48 54 12 Front /Middle Rounded ©®26th St. at Harriet lFront / Middle IRounded ©� 26th St. at Harriet lFront / Middle Rounded ©� Harriet at 26th St. 42 66 42 18 Front / Corner Straight ©� Harriet at 26th St. 40] ER]EE ISide / Midle Rounded ©� 26th St. at Minerva 132 53 36 18 Front / Middle I F- MEE126th St. e/o Santa Fe 96 48 26 12 Front / Middle Rounded �© Isoto St. EKI 40 12 Front / Midq!ej IRounded 8A 5th at Pacific ISide / Corner Straight NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 8A 0 5th at Pacific =F101 77 80 18 Front / Side Sloped Straight 8 A-1®Leonis e/o Pacific 96 49 42 Front /SideI I Straight 8A ® Seville at 46th lFront / Side I F_Straight 8A 0 Seville n/o 46th IFront / Corner IStraight E!A]= ISeville, s/o Vernon EHJ IFront / Corner F Sloped Straigh# 8A 14 5th at Seville ISide / Midle Rounded 8A 15 5th at Seville ISide / Corner I I =Straight 8A 16 5th at Seville 101 84 82 = JlFront / Side Shelf jStraight 8AM ISeville n/o 46th 84 72 83 15 Front / Side S#raight 8AEjfl (Seville at 46th JlFront / Side Sloped Straight 8 B 22 , 50th e/o Soto lFront / Side Rounded 8 B 23 50th e/o Soto .6 50 42 16 . Front / Side Rounded -.00 0.0.0 8C24 50th St. Y Downe 121 0.0.0 38 27 : 16 Y0 Front /Side Slo" ed p Rounded Eq M 50th vu/o Alcoa ` ' 1 2 43 56' ' 18' Front /!Side ' :: -Rounded 8 CEU 150th w/o Alcoa 132 `46 40 lFront /'Side IRounded' EE=Ivernon Ave 96 48 34 12 Front / Middle IRounded M0 Boyle at Vernon E53 = ISide / Corner I =_ Straight 0® ernon Ave. 96F 49 41 12 Front / Middle Rounded EEI0 ernon at Alcoa I84 38 52 18 Side / Midle Sloped jRounded ME11yernon at Alcoa IFront / Middle Rounded ernon Ave 94] lFront / Middle Rounded 0® ernon Ave. IFront / Cor-n—e-r-1 IStraight 00 ernon Ave. 96 32 56 12 Front / Side I Rounded 0 10 ernon Ave 96 43 45 12 Front / Middle Rounded M= ISoto at Vernon 96 E35 ISide / Midle IStraight El=lvernon at Downey 96 48 38 16 Front / Middle IRounded EMEEIvernon at Downey = 96 jSide / Corner j IStraight NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 10 0 IDowney s/o Vernon 96 62 60 16 Front / Middle I I Rounded 10 ® Downey s/o Vernon 96 44 64 16 Front /Middle Rounded 10 0 Downey n/o Packers 72 32 34Eaj ISide / Corner IStraight 10 © Downey n/o Packers HJ E43EKJ E16 Front / Middle I IRounded MEI0j JDowney n/o Leonis 96 45 64 = lFront / Middle Rounded EH]= JDowney at Leonis ERJ = ISide / Midle Sloped jRounded 10 12 Leonis at Downey 152 451== Back / Midle Rounded 10 jAlcoa s/o 46th 102 46 46 12 Front / Middle I F-- jBoyle at 46th EHJ IiLl12 Front / Middle IRounded EIEDEJAlcoa at 44th EM 43 59 12 Front / Corner Rounded 10 17jAlcoa at 44th lFront /Corner IStraight 10 18 4th_at Alcoa. 96 43 68 12 Front /'Corner Strai ht 10. 1:9 4th e/o Boyle 96 49 41 12 Rounded 10 : 20 4th at Alcoa6 ... 0. 43 43 12 0 Front / �Midd1'e' ` ` Rounded- 10 21 Boyle at'46th IFront /'Middlee I IRounded 10 22JAIcoa s/o 46th lFront / Middle IRounded =EMIBoyle at 46th IFront / Middle IRounded 10 26 Boyle Ave. lFront / Middle Rounded 10 27 4th at Boyle IFront / Middle I I Rounded 10 28 4th E/O Soto lFront / Middle Rounded 10 29 4th e/o Soto lFront / Middle I=Rounded 10 30 4th at Boyle 96 42 41 12 Front / Middle Rounded 10 31 6th at Boyle ISide / Cor2erj IStraight 10 32 6th w/o Boyle 96 44 68:] lFront / Middle Rounded 10 33 6th at Soto 96:] lFront / Middle Rounded 10 34 6th w/o Boyle lFront / Middle FRounded 10 35 6th at Boyle ISide / Midle I IRounded NEW CATCH BASIN DATA SHEET New I Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style EHIallLeonis at Boyle 84 39 52 18 Back /Side Sloped I I Rounded 10 M ILeonis;W-o Boyle F 38 20 Back / Midle Rounded EEM IlLeonis at Boyle= E84 EM 45 = IFront / Middle I Rounded 10 40 Leonis at Alcoa 84 38 42 18 Side /Corner IStraight L42J ILeonis at Downey 96 47 43 16 Side / Midle Straight 13 0 26th at Ayers ISide / Midle Rounded 13 0 26th at Ayers 188 60 1 IFront /Side IRounded 13 ®26th at Bonnie Beach 136 43 36 16 Front / Corner FStraight 13 0 26th at Bonnie Beach ISide / Midle I IRounded 13 ©26th at Bonnie Beach 132 52 33 18 Front / Corner I Straight 13 =7 26th w/o Bonnie B IFront / Corner IRounded 13 -00- 10 Bonnie Beach 16 0 48 0 36 �: 12 Front / Side Rounded 13 00. 11 Bonnie Beach ' ' 1 4 00.0�.. 48 40 12 Front FSide Rounded 13 12ISOnof at Bandin'i : " 100 a0 : 36 18 ` front / Mid-dle Rounded 13 15 JAyers IFront /'CornerI FStraight 13 16 yers 135 54 25 18 Front /Side Rounded E3IEMJAyers 185 54 30 18 Front / Corner Straight =EH11sunol 84 38 MET] Front / Side Straight 14 1� lCharter 96 51 24 = lFront / Middle Rounded 14 ] ICharter 96 48 55 12 Front / Corner I Straight 15 Loma Vista =E96 48 43 18 Front / Corner Straight 15 2� lExchange IFront / Corner Sloped Straight 15 0 Exchange IFront / Middle Rounded 15 ® Charter IFront / Side Sloped Rounded EMMICharter 174 46 33 12 Front /Corner Straight 15 © 9th St. 132 60 32 IFront / MijjFe-1 I Rounded EM= JExchange IFront / Side Rounded NEW CATCH BASIN DATA SHEET New Section CB No. Location Length Width Depth Lateral Size Lateral Floor Connection Configuration Screen Style 15 ® Exchange 180 F 38 12 Front /Middle Rounded 15 10 Maywood 132 46 51 12 Front / Side . Straight 15 11 MaywoodI FTT5146 39 12 Front /Corner Straight 15 ILoma Vista I EH]48 64 18 Front / Corner Straight E1fl= IDistrict at Maywood 256 46 60 12 Front / Side � Rounded 16 District 176 45 60 lFront / Side Straight 16 0 District at Everett 132 46 64 j ISide / Midle L Rounded 16 © IDistrict EK1==M Front / MiqqLej I Sloped Rounded 16 District e/o Loma Vista 180 84 60 12 Front /Side Rounded 16 ® IDistrict e/o Loma VHa:1 IM 48 24 12 Front / Side Straight 16] IDistrict EK 43EKI M lFront / Side Rounded 16 12 District Blvd 96 48 36 12 Front / Side Rounded .:16 IDistrict 96 48 36 12 Front /;SideStraight 16 14 ]District IFrbrit J'Middle Rounded' 16 15 District 267 44 43JERI Irrcint /'Side - Rounded EE]EEJDistrictat5ft 96 44 32 E12 Front / Side I Straight EHUT] District 180 EM 12 Front / Side C_� Rounded 16 18 District 180 45 E:] Ej2j lFront / Side Rounded 16 20 District 55 48- 34 12 Side / Midle Sloped Rounded 16 21 District lFront / Side Sloped Rounded HI22 District lFront /Side Sloped Rounded EHIMIDistrict 180 45 39 lFront / Side Sloped Straight EflEEIlDistrict EK 44 40 i lFront / Corner Straight EH]Efl IDistrict EHJ 37 Ej2j lFront / Corner Straight ElflEM IDistrict 128 48 35] EILI lFront / Side Straight 16 27 District EHJ48 42 =1 lFront / Corner I I Straight. EEM IDistrict 128 45 43] EIEJ Front / Corner Straight NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 176 48 53 12 Front / Corner Straight 16 30 District 264 48 36 12 Front / Side Rounded 16 31 District IFront / Side Rounded EH]M IDistrict lFront / Side Rounded 16 33 District lFront / Corner IStraight 16 34 District lFront / Side Rounded 16 35 District w/o Loma Vista IFront / SiTe7 I Rounded EHI[MIDistrict at Everett IFront / Corner Straight /EH]M IDistrict 180 44 39 12 Front / Side Rounded 17 9th e/o Everett 96 44 64 18 Front / Corner Straight 17 0 9th at Everett Ct. LIO J = IFronti Corner Straight 17 5 9th at. Loma Vista lFront / Middle Rounded 17 06. 0 9th at Loma Vista 96 000 48. = 44 . 18 . Front /;Middle Rounded 17 M 9th at -Everett Ct. 96 48 39 18 Frorlt / Side Rounded' 17 ® F9th e/o'Everett 96 42 38 DE jFrLnt / Middle Rounded 18 ® 8th e/o Loma Vista 134 51 52:] ISide / MO Straight 18 E 8th e/o Loma Vista 98' S1 56] ISide / Corner Straight 18 © 8th e/o Loma Vista 96 61 58] IFront / Side Rounded 18 10 9th e/o Loma Vista IFront / Corner IStraight 18 11 9th e/o Loma Vista 97 51 35 18 Front / Side Rounded 18 12 9th e/o Loma Vista 98 51 36 18 Front / Side Straight 18 M 150th w/o Gifford 84 38 ,64 18 Front / Side Rounded 18 14 50th e/o Corona IFront / Middle Rounded 18 EU 150th e/o Corona I84 38 65 18 Front / Corner Straight 18 16 50th e/o Loma Vista 96 109 55 18 Front / Corner I IStraight 18 17 50th e/o Loma Vist lFront / Corner I F—Straight 18 18 50th e/o Loma Vista 135 92 76] IFront / Corner I IStraight NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 18 19 50th E/O Loma Vista 120 38 42 = IFront / Corner Straight Elfl.M. 10th e/o Loma Vista 84 38 42 18 Front / Corner I L Straight 18 21 50th w/o Corona 84 38 L±2 18 Front / Side I FTounded DEM150th e/o Corona =EM IFront / Corner I IStraight EHIEHI150th e/o Corona IFront / Middle-]; Rounded 18 24 50th e/o Corona 97 52 42 IFront / Corner Straight 18 M IGifford s/o 50th 100 51 81 18 Front / Corner Straight 18 26 Gifford s/o 50th EM 51 49 18 Front / Middle Rounded 18] EMIGifford s/o 50th 97 E5E EIE JFront / Middle Rounded 18EMIGifford s/o 50th IFront / Middle Rounded 19 District at Atlantic 98 43 56 12 Front / Miad—Iej Sloped Rounded 19 a] District at Atlantic 97 60 54 12 Back / Mid.le Sloped Rounded Tifl.m IDistrict at Fruitland 97 50 65 12 -. Front / Mid j Rounded ' 23 Bandini e/o Atlantic 120 38 46 18 Front / Middle Rounded 23 M Bandini e/o Atlantic 82 38 72 18 Front / :Corner Straight 23 n/o Bandini e/o Atlantic 42 38 Ea:]Ea:] Front / Corner Straight 23 ®n/o Bandini e/o Atlantic 42 38 54 24 Front / Corner Straight California Regional Water Quality Control Board Los Angeles Region 320 W. 4th Street, Suite 200, Los Angeles, California 90013 Linda S. Adams Phone (213) 576-6600 FAX (213) 576-6640 - Internet Address: http://www.w*aterboards.ca,gov/losangeles' Arnold Schwarzenegger CallEPA Secretary Governor August 1, 2007 Mr. Donald Wolfe, Director County of Los Angeles Department of Public Works 900 South Fremont Avenue Alhambra, CA 90803-1331 CERTIFICATION OF THE CONNECTOR PIPE SCREEN DEVICE AS A FULL CAPTURE SYSTEM FOR TRASH REMOVAL UNDER THE BALLONA CREEK AND THE LOS ANGELES RIVER TRASH TOTAL MAXIMUM DAILY LOADS Dear Mr. Wolfe: We have reviewed the County of Los Angeles' (County) letter and report entitled, "Technical Report, Connector Pipe -Screen Design, Full Capture TMDL Compliance, Screen And Bypass Sizing Requirements" dated October 17, 2006, and April 2007, and additional information provided by your staff in support of your request for "Full Capture Certification" for a trash capture device referred to as a "Connector Pipe Screen Design." The purpose of this letter is to inform you of our approval'of the County's Connector Pipe Screen Design as a "Full Capture System" for use within catch basins as, a trash capture device under the Ballona Creek and the Los Angeles River Trash Total Maximum Daily Loads. A Connector Pipe Screen is a vertical stainless screen with 5 mm openings, installed inside 'a catch basin directly upstream of the connector pipe in such a manner that all water entering the basin must pass through the device. A vertical opening is provided around the perimeter of the screen to allow storm water to bypass in the event of a large storm or if the screen becomes clogged. The definition of "full capture system" for the Ballona Creek Trash Total Maximum Daily Load (TMDL) was amended per Resolution No. 04-023 adopted on March 4, 2004 by the Los Angeles Regional Water Quality Control Board. It is likely that this definition will be applicable in future revisions of the Los Angeles River Trash TMDL. As a result, .the Los Angeles Water • Board staff have also analyzed your Report for compliance with the Ballona Creek Trash TMDL's full capture system definition. The definition of a "full capture system" as defined in the Resolution No. 04-023 as the following: " A full capture system is any single device or series of devices that traps all particles retained by a 5 mm mesh screen and.has a design treatment capacity of not less than the peak flow rate (Q) resulting from a one-year, one -hour, storm in the subdrainage area. Rational equation is used to compute the peak flow rate: Q = C x 1 x A, where Q = design flow rate (cubic feet per California Environmental Protection Agency Qa Recycled Paper Our mission is to preserve and enhance the quality of California's water resources for the benefit of present and future generations. Mr. Don Wolfe, Director - 2 - August 1, 2007 County of Los Angeles Department of Public Works second, cfs); C = runoff coefficient (dimensionless); 1= design rainfall intensity (inches per hour, as determined per the rainfall isohyetal map in Figure A), and A = subdrainage area (acres). " The Los Angeles Water Board's criterion for certification as a full capture device is that It must trap all particles retained by a 5-mm mesh screen, and have a treatment capacity exceeding peak flow rate resulting from a one-year, one -hour, storm in the subdrainage area. In addition, the following requirements must be met: 1. End -of -Pipe Configuration - Certain BMPs, which can create a pressure drop, must have an end -of -pipe configuration and not rely on diversion weirs; 2. Adequate Pipe Sizing - The pipes carrying the flows from the subdrainage area should be able to handle peak flows; and 3. Regular Inspections and Maintenance -. The full capture system must be regularly inspected and serviced to continually maintain adequate flow through capacity. Summary of the County of Los Angeles' Hydraulic Analysis Staff from the County of Los Angeles Department of Public Works (Public Works) performed a hydrologic analysis to establish a method of calculating the maximum treatment flow resulting from a one-year, one -hour storm. With this information, extensive hydraulic analyses were conducted using different types and sizes of trash and debris to establish. minimum sizing requirements for the CPS screen. Public Works engineers also established minimum sizes for the bypass opening to provide flood protection during large storm events. Based on the County's Technical Report submitted on October 17, 2006 and revised in April 2007, (Report), the above -mentioned device meets the performance criteria for full capture certification. Summary of the County of Los Angeles Information Submitted Based on the County's Report,. the Connector Pipe.Screen has a 5 mm mesh screen and meets the particle capture criteria for a full capture system. The devices are designed for greater than a 1-year, 1-hour peak flow, and therefore satisfy the minimum 1-year, 1-hour design criteria;. 'The flow capacity of the devices is greater.than the estimated flow rate, therefore the Connector Pipe Screens meet -the design criteria for a full capture system; The drainage criterion is not part of the definition for a full capture system. However, it is important to note that the inserts do not retain storm water and therefore avoid any vector issues; and The Gross Solids Storage Capacity ranges depending on the size of each catch basin and its configuration. Some trash capture Connector Pipe Screens may require cleaning more frequently. California Environmental Protection Agency 00 Recycled Paper Our mission is to preserve and enhance the quality of California's water resources for the benefit ofpresent andfuture generations. Mr. Don Wolfe, Director - 3 - August 1, 2007 County of Los Angeles Department of Public Works Based on the above information, the County of Los Angeles' Connector Pipe Screens meet the definition of full capture system and are certified as a full capture system under the following conditions: 1. Adeguate Pipe Sizing: The pipes carrying the flows from the subdrainage area must be able to handle peak flows. 2. Regular Inspections: The Connector Pipe Screens should be visually inspected before and after rain events to allow for cleaning for optimal performance. 3. Regular Maintenance: The Connector Pipe Screens shall be adequately maintained and cleaned to ensure full capture of trash during the design storm. This letter serves as a determination that the vertical Connector Pipe Screens (as described and identified via photographs in the County's April 2007 Technical Report), when installed and maintained in appropriately sized catch basins, satisfy the full capture definition of the trash TMDL and will allow the systems to be used elsewhere in the region. However, all parties installing these devices will have an on -going obligation to demonstrate that the installation of a particular system -is appropriately sized and meets the intent of this program. Likewise, dischargers will be responsible for on -going maintenance to ensure the systems perform to design specifications. The Regional Water Board will review and consider performance data on a continuing basis. In the event data demonstrate that the systems are not performing to the full capture design standard established by the trash TMDL, the Los Angeles'Water Board Executive Officer reserves the right and 'ability to rescind the certification for subsequent installations deemed non -conforming or inappropriate. If you should have any questions regarding this Full Capture Certification, you may call me at (213) 576-6609, or have your staff contact Carlos Urrunaga at (213) 620-20$3 or via email at currunaga@waterboards.ca.gov. Sincere Deborah Smith Interim Executive Officer cc: Mr. Michael Levy, Office of the Chief Counsel, State Water Resources Control Board Mr. Terry Fleming, Water Division, U.S. Environmental Protection Agency, Region 9 Mr. Eugene Bromley, U.S. Environmental Protection Agency, Region 9 Mr. Paul Thakur, Caltrans, District 7 Mr. Mark Pestrella, Los Angeles County Department of Public Works Mr.. Tom Leary, City of Long Beach All Los Angeles County Municipal Storm Water Permittees All Ventura County Municipal Storm Water Permittees California Environmental Protection Agency 0 Recycled Paper Our mission is to preserve and enhance the quality of California's water resources for the benefit of present and future generations. 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U-05Q ~ Q m m m m m w ¢QZ N w U Z U <¢ F Q la- U m Z U ��'gmdmmmwcxi°S z z L5bburiiiQa-awx O O U Ix ix w w K f U w QQ I-O UUUUUpa�Q O ¢ NO��-¢QQQQ�Q JU. (] O Z¢¢ ¢ w O O O O O Z 3- W d Z FFpJO IL p OJwru S5�»wx E QQQQQUQU°. ¢ j WI� H 0 C TECHNICAL REPORT CONNECTOR PIPE SCREEN,DESIGN FULL CAPTURE TMDL COMPLIANCE SCREEN AND BYPASS SIZING REQUIREMENTS COUNTY OF LOS ANGELES DEPARTMENT OF PUBLIC WORKS April 2007 PREPARED BY DESIGN DIVISION Taejin Moon, P.E., Associate Civil Engineer Josh Svensson, P.E., Associate Civil Engineer DIRECTED BY: Mike Soliman, P.E., Principal Engineer SUPERVISED BY: Jim Thurow, P.E., Senior Civil Engineer Amir Zandieh, P.E., Civil Engineer ASSISTED BY: Richard Weyermuller, P.E., Field Modeling Ben Willardson, P.E., Hydrology Engineering 6 �(- U,1s 0'j ^-{ 1Vvv Table of Contents I. Purpose and Scope......................................................................................................1 II. Abstract..................................................................................................... 1 III. Background ....................................................................................... .............. 2 IV. Hydrology Study......................................................................................................... V. Catch Basin Flow........................................................................................................ 5 VI. Screen Flow Calculations.......................................................................................... 7 VII. Field Testing............................................................................................................. 8 VIII. Bypass Flow Calculations......................................................................................10 IX.Results.....................................................................................................................11 X. Catch Basins in Series.....................................................:.....................:...:..............13 XI. Maintenance Requirements.....................................................................................14 Index of Figures Figure 1: CPS inside catch basin.......:..............................................................:............. 1 Figure 2. Frequency of runoff ratios resulting from modified rational modeling ............... 4 Figure 3: Catch basin flow for various street slopes ................................................ I....... 5 Figure 4: Catch basin profile........................................................................................... 7 Figure5: CPS Testing ..................................................................................................... Figure6: Field test data 8 ................................................................................................... Figure 7. Catch Basin with screen and bypass with zero freeboard 9 .............................. J o Figure 8. Minimum clearance due to ARS...................... .......:................................. 10 ...... Figure 9: Plan view of catch basin.....................................................................:...........11 Figure 10. Rectangular screen across CB corner.........................................................13 Figure 10A: Same side catch basin in series................................................................13 Figure 10B: Opposite side catch basin in series...........................................................13` Index of Tables Table 1: Storm frequency conversion factors based on rainfall frequencies ................... 3 Table 2: Runoff analyses variables for 1-yr vs. 10-yr...................................................... 3 Table 3. Statistics of Runoff Frequency Ratios Based on Modified Rational Modeling ... 4 Table 4: Catch basin flow (cfs) for various street slopes ................................................. 5 Table 5: Maximum Q1-1 flow............................................................................................ 6 Table 6: Field test data ................... Table 7: Recommended values for a V=3.5' catch basin..............................................12 I. Purpose and Scope The intent of this report is to establish a conservative sizing criterion for connector pipe screens (CPS) to comply with the Ballona Creek and Los Angeles River Trash Total Maximum Daily Load (Trash TMDL) full capture standard while maintaining the existing level of flood protection for Los Angeles County Flood Control District (LACFCD) facilities. II. Abstract CPS devices are vertically oriented screens installed inside a catch basin (CB), directly upstream of the connector pipe as shown in Figure 1. Connector Pipe Screens are fabricated from 5mm mesh screen and are designed to comply with the Regional Water Quality Control Board's (RWQCB) definition of a full capture system. Engineers from the County of Los Angeles Department of Public Works (Public Works) performed hydrologic analysis to establish a method of calculating the maximum treatment flow resulting from a one-year, one -hour storm. Using this information, they performed hydraulic analyses to establish minimum sizing requirements for the CPS screen. Public Works engineers also established minimum sizes for the bypass opening, which provides flood protection during large storm events. Hpm zuut 1 Design Division M. Background Public Works has been given the responsibility to bring its flood control facilities into compliance with the TMDLs established by the RWQCB. Public Works has undertaken an aggressive testing program to find devices that may be used to retrofit existing flood control infrastructure. Potential devices are tested for their ability to meet the TMDL requirements and to ensure that they do not reduce flood control protection. As defined by the RWQCB, the standard for full -capture status is the following: Compliance with the final Waste Load Allocation may be achieved through a full capture system; which is defined as any device or series of devices that traps all particles retained by a 5mm mesh screen and has a design treatment capacity of not less than the peak flow rate (Q) resulting from a one-year, one-hourstorm in the sub -drainage area. (CA RWQCB TENTATIVE RESOLUTION NO. 07-OXX, Sec. 12, page 3, July 12, 2007) A CPS is a vertical screen with 5 mm openings, installed inside a catch basin directly upstream of the connector pipe in such a manner that all water entering the basin must pass through the device. A vertical opening is provided around the perimeter of the screen to allow storm water to bypass in the event of a large storm or if the screen becomes clogged. Connector Pipe Screens are currently manufactured and installed by Advanced Solutions (Stormtek) and American Storm Water (Debris Dam). April 2007 2 Design Division IV. Hydrologv Stud Since the majority of LACFCD facilities are designed for a. 10-year design storm frequency (Q10), the calculations in this report will design the CPS for a CB designed with a 10-year storm frequency. In order to determine the 1-year 1-hour TMDL flow, we need to establish'a conservative conversion factor, k, from a 10-year storm, Q1o, to a TMDL flow (Q,-,) as shown in Equation 1. Equation 1: Q1-1 < k - Qio To develop this conversion factor (k), we first compared storm frequency ratios. This involved comparing the magnitude of one 24-hour storm frequency with another 24-hour storm frequency. The results of this analysis are shown in Table 1 as a ratio used to convert one storm frequency to another based only on the 24-hour isohyetal values for different storm frequencies. The ratios are consistent with the ratios provided in the Los Angeles County 2006 Hydrology Manual' for scaling storm frequencies. Storm Frequency Conversion Factor Qx-k=Q1-1 2- r 5- r 10- r 25- r k 0.413 0.274 0.224 0.182 0.160 Table 1: Storm frequency conversion factors based on minfnii franc i.pnc Based on the conversion of storm frequencies, a value of k = 0.224 would be appropriate for use in the conversion. However, this value does not take into account the changes to runoff that occur due to changes in infiltration rates and times of concentration. To better quantify these hydrologic effects, we used the Time of Concentration CalculatorZ to model over 360,000 different hydrologic scenarios of varying storm frequencies and watershed characteristics. Table 2 shows the values used .for the 1-year vs. 10-year flow comparisons. Watershed Parameter Values Used Lengths 1000, 1500, 2000 Area 1 and 10 acres Soils 2 through 180 Sloe 0.01, 0.05, 0.08, 0.10, 0.15, 0.20 Imperviousness 0.15, 0.45, 0.95 10- r Isoh ets 1, 2, 4, 6, 8, 10, 12 Possible Combinations 90,216 a 1W . I XUI ivn Of iarysus vdi Mules Tor "I-yr vs. "I u-yr Available from the Public Works website at http://www.ladpw.orc/wrd/publication/ 2 An Excel spreadsheet available from the Public Works website at htti)://www.ladi)w.org/wrd/publication/ April 2007 3 Design Division Hydrologic modeling using the modified rational method provided insight into the combined effects of watershed characteristics on the runoff ratios. The maximum runoff ratio measured in the extensive testing is being used for the k factor. Table 3 contains the maximum value selected for k based on these studies. Statistics 1- r/2- r 1- r/5- r 1- r/10- r 1- r/25- r 1- r/50- r W.W. Or30 ,3 0 2Q21 0 364. 0 11.45;. 0 1167' Count 67,662 67,662 90,216 67,662 67,662 t aute 0. Jiaiisucs of Runoff Frequency Ratios Based on Modified Rational Modeling Figure 2 is provided to show the probability distributions of the runoff ratios generated during the testing. Frequency of Modeled Runoff Ratios 25000 20000 15000 c 0 U 10000 5000 0 i 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 Runoff Ratio -2-yr r: Ratios -5-yr Ratios 10-yr Ratios -25-yr Ratios 50-yr Ratios tyute /-. nequency or runorr ra ios resuiting from modified rational modeling Based on a comparison of Table 1 and 3, k values from Table 1 have been verified to be a very conservative values for converting an n-year frequency storm to a 1-year, frequency storm. A 10-year frequency storm conversion is shown in Equation 2. Equation 2: Qi-t < 0.22 - Qto This k value will be a conservative assumption that compensates for different land uses, soil types, areas, slopes, isohyets, and travel path lengths. In most cases of the CPS design, the bypass flow requirements will govern the design, and the screen capacity will be more than adequate to pass the Q1_1 flow. Currently, LACFCD is not installing BMP devices on deficient systems (5 year frequency capacity and less) due to uncertainty of flooding risk and maintenance liability. April 2007 4 Design Division V. Catch Basin Flow A conservative (i.e. maximum) estimate of catch basin flows based on curb opening widths must be determined in order to calculate the Qj_j. The bypass structure must also be able to pass the maximum catch basin flow in order to provide proper flood protection. Two parameters of catch basin flow (curb flow depth and street slope) must be conservatively assumed in order to calculate the design flow into a catch basin. Based on the LACFCD Hydraulic Manual3 (Chart D-10D), the street slope does not have a large impact on side -opening catch basin flow, as shown in Table 4 and Figure 3. Street Slo a ft/ft Street Width (ft) 0.006 0.01 0.03 0.05 3.5 3.7 4 4.3 4.6 7, 7.3 7.8 8.4 9 10 10.1 11 11.9 12.7 14 13.7 14.9 16 17.2 21 18.7 20.7 22.6 24.3 28 23 25.5 27.8 30.1 Table 4: Catch basin flow (cfs) for various street slopes (depth of flow- 8", local depression=2") 35 30 25 20 CY 15 10 5 0 Catch Basin Capacity with varyinq sloaes c 5 10 15 20 25 CB width (ft) s=0.005 s=0.01 s=0.03 s=0.05 VUI V a. %-.atcn pasin now Tor various street slopes MI 3 Available for download at http://www,lad ow. ora/wrd/publication/Engineering/design manual adf April 2007 5 Design Division Street Slope Although street slope does not to have a major impact on CB flows, flows do increase slightly as the slope increases. Curb opening catch basins are not installed on slopes larger than 0.04, so a slope of 0.04 can be assumed to be the maximum slope Local Depression The local depression will also impact the flow to the catch basin up to 25%. However, the vast majority of Public Works catch basins have a local depression of 2 inches; so 2 inches will be used in this study. Curb Flow Depth A depth of 6-inches can be assumed to be a conservative value for the depth of flow. A depth of flow of 8-inches (up to the curb height) would be very unlikely, especially on a steeply inclined street (slope >= 0.04). Analysis Parameters In summary, the criteria used for the hydraulic analysis of catch basins was: Basin type: Side Opening Catch Basin (SPPWC Standard Plan 300) Depth of flow: 6" Street slope: 0.04 ft/ft Local depression: 2" Results for the maximum flow for different catch basins of various widths are shown in the center column of Table 5. Using Equation 2, we can calculate the QI_I for catch basins of various widths as shown in the right column of Table 5. CB width ft Max Qio cfs Max QI_1 cfs 3.5 2.8 0.6 7 5.3 1.2 10 7.5 1.7 14 10.0 2.2 21 13.9 3.1 28 17.3 3.8 Table 5; Maximum QI_, flow April 2007 "6 Design Division VI. Screen Flow Calculations To calculate the loss in hydraulic head and flow through the CPS screen, we used an orifice equation to determine the theoretic flow rate. See Figure 4. Equation 3: Qscreen = CAscreen 29h The flow through the screen is a function of the open area (A) of the screen and the differential head between the upstream -and downstream side of the screen, h. The orifice coefficient, c, is an empirically determined constant which accounts for friction and turbulence at the orifice. This coefficient is unique to each orifice geometry, and was established in our hydraulic laboratory at the San Gabriel Dam (See Section VII). Since Qi_i flows are small relative to design flows and most connector pipes have steep slopes (>O.10) and therefore supercritical flow, critical depth and critical velocity losses can be assumed to be a conservative approximation of the water depth on the downstream face of the screen. The velocity head multiplier (1.2) in Equation 4 is the loss encountered at the entrance of the connector pipe per the LACFCD hydraulic manual. 2 Equation 4: Downstream depth (Dd) = d, + 1.2 V S To find the flow through the screen, Equations 3 and 4 must be solved simultaneously using an iterative process since the critical depth is a function of the flow passing through the screen. April 2007 7 Design Division VII. Field Testing Due to the fact that orifice conditions for the screen holes differ substantially from the conditions used to determine the standard orifice coefficients, Design Division performed field tests at the San Gabriel Dam catch basin testing facility (Figure 5) in order to determine the coefficient cSc,ee„ for Equation 3. Figure 6 and Table 6 present results of the field-testing data, April 2007 8 Design Division Screen Discharge 1.00 C1 0.10 0.01 0.10 1.00 Delta h (ft) Figure 6: Field test data Run Q cfs U/S screen depth ft D/S screen depth ft h ft Area ftZ Orifice coefficient, c 1 0.31 1.62 1.55 0.07 0.228 0.640 2 0.52 1.80 1.62 0.18 0.253 0.603 3 0.75 2.00 1.61 0.39 0.282 0.532 4 0.22 1.61 1.57 0.04 0.248 0.553 5 0.31 1.67 1.59 0.08 0.257 0.531 Average Cscreen 0.572 Table 6: Field test data Figure 6 shows that there is clearly a relationship between Q and h, which confirms that Equation 3 is applicable. The varying values for cscreen in Table 6 can be attributed to debris lodged in the screen, which is difficult to measure. Even the slightest change in area can drastically impact the Cscreen coefficient. We will use the smallest, most conservative value, Cscreen =0.53, in our calculations. Hpni /-uut 9 Design Division VIII. Bypass Flow Calculations For the bypass flow calculation, an orifice equation can also be used. A weir equation can be used but since the maximum water depth will be above the bypass area, an orifice equation is more appropriate (See Equation 5). The maximum depth of flow can be assumed to be anywhere between the flow line or 6-inches below the flow line. Figure 7 shows this situation more clearly. Equation 5: Qbypass = cbypassAbypoass 2gH As part of our retrofit program, Public Works is also intending to use automatic retractable screens (ARS) to further limit trash entering the catch basin. A minimum clearance of 4-inches is required between the top of the bypass and the flow line due to physical restrictions from the ARS See Figure 8. Figu ARS April 2007 10 Design Division IX. Results The bypass height (Hbypass) and length (L) requirements to pass the design flow were first established. With a given bypass height, a height for the screen can be calculated using the remaining depth of the catch basin while ensuring the minimum 6-inch clearance between the flow line and top of the bypass structure. The required length (as shown in Figure 9) of the bypass will be the same length for the screen. The screen capacity was calculated to ensure that the height and length of the screen will pass the Qi-i flow. The freeboard was encroached when necessary. manhole screen Figure 9: Plan view of catch basin The following assumptions are made in these calculations: Screen Clogged % = 50% (conservative assumption from observation) Open area of screen = 44% (area open for a Stormwater screen, min. area open) Example Calculation For V depth = 3.5'1 CB Width = 3.5, Qio = 2.8 cfs, QI-I = 0.6 cfs, assume Hbypass = 6'; Hscreen= 1 8" Check Clearance: = V-depth — Hsc-,e Hbypass -curb height =3.5'— 1.5'-0.5' 8/121= 10 inches clearance to flow line > min. 4" Size Bypass Using Equation 5, Qbypass = cbypassAbypoass 2gn = cbyp.HbypassL 2gH Hbypass = 6 inches, with cbypass=O.6, 9=32.2, H = Hbypass + 10" - 6" freeboard 2 6" _ — + 10"-6" = 7" 2 "N"' 4 uu1 11 Design Division Qbypass = CbYp.HbypassL 2gH 2.8 = 0.6x0. S' xL 2x32.2x7 / 12 L = 1.52 feet Then using Equation 3, the screen area can be checked to see if it can pass the Qj_j. Based on a L=1.53 feet and a height of 1.5 feet, the screen can pass 1.5 cfs which is greater than the 0.6 cfs it needs to pass, thus the dimensions are satisfactory. The following Table 7 provides an example of sizing recommendations for screen and bypass heights and lengths for a V-depth of 3.5 feet. To use this table, a designer would find the row corresponding to the CB width, and would then size a screen that met the minimum height and length. N. depth" ft CB Width ft Max Qjo cfs Bypass Height in Free- board in Screen Height in QI.1 cfs Clear- ance in Screen Length ft Screen Capacity cfs 3.5 3.5 2.8 6.0 6:0 18 0.6 10.00 1.5 1.5 3.5 7 5.3 6.0 6.0 18 1.2 10.00 2.9 2.9 3.5 10 7.5 6.0 5.0 18 1.7 10.00 3.8 3.8 3.5 14 10.0 8.0 0.0 18 2.2 8.00 3.1 3.1 3.5 21 13.9 8.0 0:0 18 3.1 8.00 4.3 4.3 3.5 28 1 17.3 1 12.6 6.6 18 1 3.8 1 4.00 3.9 3.9 Table 7: Recommended values for a V=3.5' catch basin Note that these are only recommended values. Different values may have capacity to pass the design and TMDL flows. Please see the attached appendix for CPS sizing recommendations for most common catch basin sizes. Some combinations of V-depths and connector pipe sizes made installation of a practically sized CPS impossible, thus the height of the screen had to be reduced below our recommended standards (the total area and therefore treatment capacity of the screen is still adequate even in these unusual scenarios). A size recommendation was made based on the most practical size. For example, a 15" radius screen, with a 180-degree angle will result in a length of 3.9 feet, or a 15" radius screen with a 90-degree angle will result in a length of 1.96 feet. Thus, the bypass height, screen height were calculated with the goal to calculate a length close to 3.9 feet or 1.9 feet. Increasing the radius or installing rectangular screens to increase the lengths can accommodate any lengths larger than the recommended value. The screen does not have to be a semi -circular arc, as long as the minimum length and height requirements are satisfied, it will pass the TMDL and design flow regardless of shape. Figure 10 shows an example of a non -circular screen. April 2007 12 Design Division X. Catch Basins in Series For parallel catch basins in series (See Figure 10A), only the upstream catch basin shall have a CPS, since the low flow will only enter the upstream basin. The upstream CPS can be sized just like an individual basin. Figure 10A: Same side catch basin in series Figure 10B: Opposite side catch basin in series For catch basins in series across from each other (See figure 10B), the upstream and downstream CB CPS shall be designed as individual basins. However, the downstream basin will need to bypass its design flow and the upstream design flow. The downstream basin shall be designed such that the width of the basin is the sum of the downstream and upstream basin. For example, for two seven -foot basins, the downstream basin shall be designed as a 14-foot basin. Apri12007 13 Design Division XI. Maintenance Requirements The purpose of a Connector Pipe Screen ,(CPS) is to contain trash within a catch basin, excluding it from the storm drain system. Routine maintenance will be necessary to remove trash from the catch basin to prevent it from accumulating to a point that would affect the performance of the CPS or the catch basin itself. Proposed Maintenance Approach ■ Inspect and clean each catch basin between May 1 and September 30 of each year. ■ Inspect and provide additional cleaning of any catch basin that is at least 40% full of trash and/or debris. Based on field testing at the San Gabriel Dam catch basin testing facility, visual observation of City of Los Angeles Vertical screens, and recommendations from the City of Los Angeles, the following physical requirements were established. • Minimum V-depth = 3.5 • Minimum screen height = diameter of connector pipe • 6" spacing for vertical bars .for bypass • 6" minimum bypass height • 4" minimum clearance from flow line to top of bypass structure. • When low flows have the potential to fall from the curb to behind the CPS, a deflector or screen must be installed on the top of the structure. • Where manhole access is impeded due to the internal screen, a new manhole shall be constructed. April 2007 14 Design Division rn c N CO a C (6 N N (0 C Q U (0 a a U n. co U LL r Q >31 cN N cB c O N U) CL V W O Q. CU LL N RZ O r CO CV M CV) C7 CM- 9 rn a I a0O O: ; s� fiN S 00 O 00 I- CV M O OB 'Ck3 a a - mm � r2 oll Q �, r..O O'� O D. 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TO: CONSULTANT REQUESTED BY: You are hereby directed to make the herein described changes from the original scope of work of this agreement. Except as specifically modified herein, all terms and conditions of the original agreement remain in full force and effect, and apply to the additional work as if said work was nrioinslly innlnded in flip anrpempnt Agreement Amount (Base Bid) ............................,................. $ Amount of This Change Order $ Amount of Previous Change Orders $ Total Change Orders _ $ Modified Agreement Amount $ By reason of this change order the time of completion will be a 'usted as follows: Approved: Date: Director of Community Services & Water Attest: • Date: Manuela Giron, City Clerk We, the undersigned Consultant, have given careful consideration to the change proposed and hereby agree, if this proposal is approved, that we will provide all labor, equipment and materials, including overhead, exceptas may otherwise be noted above, and perform all services necessary for the work above specified, and will accept as full payment therefore the prices shown above. Accepted Date: Consultant: By: Title: c: Yroject Mlleiuonsultant/Yurehasmg Exhibit B i 4305 Santa Fe Avenue, Vernon, California 90058 Telephone (323) 583-8811 E.rcCusiveCy IndustriaC SERVICES AGREEMENT This AGREEMENT ("Agreement") is made, entered into and executed in duplicate originals, either copy of which may be considered and used as the original hereof for all purposes, as of this 4t" day of August, 2008, in the City of Vernon, County of Los Angeles, California BY AND BETWEEN CITY OF VERNON, a municipal corporation, hereinafter referred to as the "City" 4305 Santa Fe Avenue Vernon, California 90058 AND G2 Construction Inc., an independent contractor, hereinafter referred to as the "Contractor" 13331 Garden Grove Boulevard, Unit H Garden Grove, California 92843 RECITALS WHEREAS, the City has determined to retain the services of an independent contractor to install two hundred thirty-three (233) catch basin devices to minimize the trash discharged to the Los Angeles River, and WHEREAS, on May 8, 2008, the County of Los Angeles Flood Control District awarded a contract to Contractor, after an open public bid process, for the installation of catch basin devices to minimize the trash discharged to the Los Angeles River, and WHEREAS, the County of Los Angeles Flood Control District bid provides an opportunity for the City to secure the installation of the connector pipe screens at a minimum unit cost for each of the units by "piggybacking" on the County of Los Angeles Flood Control District bid, and .WHEREAS, Contractor has prepared a proposal dated April 10, 2008, for the Services, a copy of which is attached hereto as Exhibit A and incorporated by this reference (the "Proposal"); and WHEREAS, Contractor represents that it is qualified and capable of furnishing the labor, materials and expertise necessary to perform the Services that the City requires, as set forth in this Agreement, and is willing to do so on the terms and conditions set forth below; and Page 1 of 19 WHEREAS, the Contractor's cost proposal is acceptable to the City; and WHEREAS, the City desires to enter into an agreement with Contractor to install two hundred thirty-three (233) catch basin devices to minimize the trash discharged to the Los Angeles River, on a contract basis as defined in the terms and conditions set forth below. NOW, THEREFORE, IT IS AGREED AS FOLLOWS: SECTION 1. TERM OF CONTRACT 1.01. This Agreement will become effective on August 4, 2008, and will continue in effect until such time as the two hundred thirty-three (233) catch basin devices are installed and in good working order, or until terminated as provided in this Agreement. SECTION 2. DEFINITION OF TERMS 2.01. Whenever used in the Agreement, the following terms shall mean: A. "Agreement" shall mean that formally executed Agreement or Contract which includes the Contract Documents attached. The Agreement constitutes the entire agreement between the parties relating to its subject matter. B. "City" shall mean the City of Vernon, California, the entity which has executed the Agreement and, where applicable, its affiliated companies, and its officers, directors, employees, representatives and agents. C. "Contractor" shall mean G2 Construction Inc. and, where applicable, its affiliated companies, and its officers, directors, employees, representatives and agents. D. "Contract Documents" shall include any inquiry, invitation to bid, or proposal which may have, but not necessarily, preceded execution of the Agreement, and including the General Provisions and all exhibits and schedules attached to the Agreement and all plans and specifications identified in the Contract Documents. Page 2 of 19 E. "Contract Price" shall mean the compensation set forth or provided for in Section 4.01 of this Agreement. Whether it expressly provides for the reimbursement of costs incurred by Contractor or simply for the payment of a lump sum of money, it is intended to be the full and complete payment for satisfactory completion of the Work and, unless otherwise stated, to cover all costs whether for materials, equipment, tools, labor, services and taxes and all overhead, rentals and profit or fee, if any. F. "General Provisions" or "General Conditions" shall mean the General Provisions as set forth in this Agreement. G. "Premises" shall mean the physical premises under City's control or ownership where Work hereunder is to be performed. H. "Proprietary Information" and "Confidential Information" shall mean all information, whether written or oral, which Contractor acquires from, through or on behalf of City, directly or indirectly, or which arises out of the Work, concerning the Work or proprietary processes involved in the Work including, without limitation, information concerning past, present or future business plans of City, information about the operations of City's Premises, and other City information or know-how obtained during the Work, except information falling into any of the following categories: Information which, at the time of disclosure hereunder, is in the public domain; 2. Information which, after disclosure hereunder, enters the public domain, except where such entry is the result of Contractor's or any entity within Contractor's control breach of this Agreement; 3. Information which, prior to disclosure hereunder, was already in Contractor's possession without limitation regarding disclosure to others; or 4. Information which, subsequent to disclosure hereunder, is obtained by Contractor from a third party who is lawfully in possession of such information and not subject to a contractual or fiduciary relationship to City with respect to said information and who does not require Contractor to agree to refrain from disclosing such information to others. Page 3 of 19 "Subcontractor" shall mean any first or lower -tier subcontractor and its employees, representatives, agents, subcontractors or other personnel who have been approved in the manner required by this Agreement. "Work" or "Services" shall mean the work performed by Contractor and required to be performed from time to time by City under this Agreement. SECTION 3. SERVICES TO BE PERFORMED BY CONTRACTOR Specific Services 3.01. Contractor's Services shall include, but will not be limited to, installation of two hundred thirty-three (233) catch basin devices to minimize the trash discharged to the Los Angeles River. The Contractor's Services are more specifically detailed in the Proposal attached hereto as Exhibit "A" and incorporated herein by this reference. Change of Services 3.02. City may at any time, by written change order executed by the City, make changes only to extend the Work duration and total compensation of Contractor's Work. Changes in the scope of Work, or duties and obligations, shall be authorized only by the City. 3.03. City may make "Changes" by increasing, reducing or deviating from the requirements of the scope of Work. A form of Change Order is set forth in Exhibit B attached hereto and incorporated by reference. Timing of Services 3.04. Contractor's Services shall commence upon the execution of this Agreement by both parties and award by the City Council of the City and shall end at such time as the installation of the two hundred thirty-three (233) catch basin devices within the City is completed and such equipment is in good working order, unless this Agreement is otherwise terminated according to Section 6 of this Agreement or extended according to the conditions and terms set forth in this Agreement. 3.05. Time is of the essence for all Work contemplated by this Agreement. Contractor shall start performing Services under this Agreement only after notification by the City. Page 4 of 19 Method of Performing Services 3.06. Contractor will determine and is responsible for the method, details, and means of performing the above -described Services. Status of Contractor 3.07. Contractor enters into this Agreement, and will remain throughout the term of this Agreement, as an independent contractor. Contractor agrees that it is not and will not become an employee, partner, agent, or principal of City while this Agreement is in effect. Contractor agrees it is not entitled to the rights or benefits afforded to City's employees, including disability or unemployment insurance, workers' compensation, medical insurance, sick leave, or any other employment benefit. Contractor is responsible for providing, at its own expense, disability, unemployment, and other insurance, worker's compensation, training, permits, and licenses for itself and for its employees and subcontractors. Contractor shall have complete and sole control over its employees, the details of the Services and methods by which the Services are accomplished, it being understood that City is interested only in the results to be obtained by Contractor. 3.08. Contractor has no authority to enter contracts or agreements on behalf of City. This Agreement does not create a partnership or joint venture between the parties. Payment of Taxes 3.09. Contractor is responsible for paying when due all income taxes, including estimated taxes, incurred as a result of the compensation paid by City to the Contractor for Services under this Agreement. Contractor agrees to indemnify City for any claims, costs, losses, fees, penalties, interest, or damages suffered by City resulting from Contractor's failure to comply with this provision. 3.10. Payroll taxes including federal, state and local taxes shall not be withheld or paid by City on behalf of Contractor or for the employees of the Contractor. Contractor shall not be treated as an employee with respect to the Services performed hereunder for federal or state tax purposes. Contractor shall be responsible to pay taxes mandated by law. 3.11. Since Contractor is not an employee of City, Contractor is not eligible for and shall not participate in any employee benefit of City, including pension, health or other fringe benefits. Page 5of19 SECTION 4. COMPENSATION 4.01 In consideration for the Services to be performed by Contractor, described in Section 3 of this Agreement, City agrees to pay Contractor the amounts specified in the Contractor's proposal (the "Contract Price"). The Contract Price shall not exceed Two Hundred Six Thousand Two Hundred Five and no/100 Dollars ($206,205.00) plus any applicable taxes. Entire Compensation 4.02. The Contract Price is full and complete compensation, and constitutes the entire compensation due Contractor for the Services and any and all of Contractor's obligations hereunder. The Contract Price set forth above is not subject to escalation for any reason except as expressly set forth in this Agreement. No adjustments in compensation shall be made as a result of changes in the value of any currency. The Contract Price shall only be adjusted by formal, written Change Order or amendment to this Agreement. Payment of Compensation 4.03. For Services rendered under Section 3 of this Agreement, Contractor shall be entitled to receive monthly payments. Contractor shall submit to City a monthly invoice and statement of Services, prepared in accordance with City requirements, by the fifteenth (15t") of each month, for the prior calendar month's completed Work. City will make payments to Contractor within thirty (30) days after acceptance and approval of the invoice received from Contractor. 4.04. Contractor shall be responsible for paying any subcontractors used in the performance of this Agreement. Subcontractors shall not bill the City directly. Expenses 4.05. City shall not be liable to Contractor for any expenses paid or incurred by Contractor. Expenses may only be billed if advance written approval has been obtained from the Executive Director. Compensation for Changes 4.06. The compensation due Contractor, or the credit due City, for changes may not be established verbally, and shall be established in a written change order signed by City as described in Sections 3.02 and 3.03 of this Agreement. Compensation adjustments in each such change order shall be established by one or more of the following bases, as determined by City: (a) a lump sum price to be negotiated Page 6 of 19 between the parties; or (b) Work unit rates to be negotiated between the parties. Once established, the amount of the compensation due Contractor or credit due City for a change shall not be subject to adjustment for any reason, including changes in the value of any currency. SECTION 5. OBLIGATIONS OF THE PARTIES 5.01. Contractor is responsible for meeting all conditions of this Agreement and City Standards & Details for all Work performed. Substandard Work, as determined solely by the City, shall be redone at the expense of the Contractor. Products of Consulting 5.02. All products of consulting services including, but not limited to, manuals, documents and/or computer software, shall become the property of the City and shall be delivered to the City before the end of the performance of this Agreement. Basic notes and sketches, charts, computations and other data shall be made available to City without restriction or limitation on their use. Liability Insurance 5.03. Contractor and its subcontractor(s), if any, shall, prior to commencement of any Work and for the duration of this Agreement, obtain and maintain at its own expense, those minimum levels of insurance coverage as set forth below. Prior to commencing Work hereunder, Contractor shall provide the City with proof of insurance providing and maintaining the coverages and endorsements set forth below. Said proof of insurance shall also provide that said policy or policies shall not be canceled or materially reduced in coverage without giving at least thirty (30) days prior written notice to the City. 5.04. The insurance coverage as listed herein, shall be properly endorsed to include those contractual obligations which may be identified further within this Agreement and shall be endorsed to provide City all the rights and privileges of an additional insured. 5.05. Contractor shall cause its insurers to issue, including but not limited to, Certificates of Insurance or, upon request, certified copies of the insurance policies evidencing that the coverages and policy endorsements required under this Agreement, are maintained in force. 5.06. Contractor shall ensure its subcontractor(s), if any, maintain those insurance requirements as specified in this Agreement and are endorsed as additional Page 7 of 19 insured(s) on all required Contractor insurance coverages. Contractor and its subcontractor(s), if any, shall maintain in effect the following minimum insurance coverages on an Occurrence Form Policy: -Workers Compensation within the statutory limits, including occupational illness or disease coverage in accordance with the laws of the nation, state, territory, or province exercising jurisdiction over Contractor's employees. Workers Compensation and Employers Liability Insurance shall have a minimum limit of $1,000,000 per occurrence. Contractor further agrees to hold harmless and indemnify City for any and all claims arising out of an injury, disability, or death of any of Contractor's employees or agents. 2. Comprehensive General Liability Insurance, including, but not limited to, Contractual Liability, Products and Completed Operations Liability, Broad Form Property Damage and Bodily Injury Liability, and Explosion, Collapse and Underground Liability, with a minimum combined single limit of $2,000,000 per occurrence. 3. Comprehensive Automobile Insurance, including, but not limited to, all owned, non -owned or hired vehicles with a minimum combined single limit of $1,000,000 per occurrence for bodily injury and property damage. 4. Excess Liability Insurance with limits of $2,000,000. Such evidence of insurance can either be through the primary insurance coverages or through an excess policy. Such insurance shall at all times be on an occurrence form and provide policy conditions as broad as those required in the primary insurance. 5.07. Contractor agrees to provide insurance in the amounts and forms specified above. Contractor shall submit to the City documentation indicating compliance with these minimum requirements no less than one (1) day prior to the beginning of performance under this Agreement. Contractor shall not commence performance of its Work under this Agreement until the above insurance has been obtained and proof of insurance has been filed with and approved by the City. 5.08. Contractor shall not permit a subcontractor or vendor to perform work on City premises unless and until a certificate of insurance is obtained showing that such subcontractor or vendor has worker's compensation coverage. If Contractor employs subcontractors as part of the Services rendered, Contractor's protective Page 8 of 19 coverage is required. Contractor may include all subcontractors as insureds under its own policy or shall furnish separate insurance for each subcontractor, meeting the requirements set forth above. Representations 5..09. To the fullest extent permitted by law, Contractor shall defend, indemnify and hold harmless City and its elected officials, officers, agents and employees from all claims, suits, actions, demands, damages, liabilities, expenses, judgments, settlements, and penalties, losses, fines, and all costs and expenses incurred in connection therewith, including reasonable attorney's fees and all costs of defense, arising out of or attributable to the negligent or wrongful acts of Contractor or its employees or agents under this Agreement, except to the extent arising from or caused by the sole negligence or willful misconduct of the City, its officers, agents or employees. The terms of this indemnity shall survive the termination of this Agreement. The obligations in this Paragraph are in addition to Contractor's duty to provide insurance and shall not be limited by any limitation on the amount or type of insurance coverage carried by Contractor. 5.10. Contractor and City represent that each has read and understands the Agreement and Contract Documents. The Contractor represents it understands the City's regulations concerning Premises access, badges, parking, security, safety, fire, prohibited drugs and alcohol, and smoking and other rules, and that Contractor has visited Premises where the Work is to be done and is familiar with the local conditions under which it is to be done. Contractor also represents that it is experienced in performing and competent and qualified to perform the kind of tasks or assignments included in the Work and employs or has available for employment in sufficient numbers all unskilled, skilled, administrative, supervisory, professional and managerial or other personnel required to perform the Work as required by this Agreement. 5.11. Contractor represents that it has the qualifications and skills necessary to perform the Services under this Agreement in a competent, professional manner, without the advice or direction of City. This means Contractor is able to fulfill the requirements of this Agreement. Failure to perform all the Services required under this Agreement constitutes a material breach of the Agreement. Contractor has complete and sole discretion for the manner in which the Work under this Agreement will be performed. 5.12. Contractor declares and states that is has complied with and will continue to comply with all federal, state and local laws regarding business permits and licenses that may be required to carry out the Services to be performed under this Agreement. Page 9 of 19 5.13. Contractor agrees to indemnify, defend, and hold City free and harmless from all claims, demands, losses, costs, expenses, obligations, liabilities, damages, recoveries and deficiencies, including interest, penalties, attorney's fees and costs, that City may incur as a result of a breach by Contractor of any representation or provision contained in this Agreement or any negligent or intentional acts or omissions by Contractor, it subcontractors, agents, and employees or based on any claim that any software program or other product used or furnished by Contractor in the performance of this Agreement constitutes an infringement of any United States patent or copyright. 5.14. Contractor's rights under this Agreement may not be assigned nor may its duties be delegated or subcontracted without the prior written consent of City. Any assignment or delegation or subcontract in violation of this Section shall, at City's sole discretion, be void. Consent by City shall not relieve Contractor of responsibility for performance of Contractor's obligations hereunder. City may assign all or any part of this Agreement at any time effective immediately upon written notification to Contractor. 5.15. At all times while Work is being performed on the Premises each party shall be represented thereon by a designated representative. Each party may notify the other in writing of the identity of such persons from time to time. Work Injury 5.16. The treatment and care of injuries sustained by Contractor's employees, subcontractors, representatives or other personnel shall be and remain the responsibility of Contractor. City's first aid facilities, if any, however, will be made available to Contractor's employees in emergency cases which are the direct result of accidents occurring on the Premises. City shall incur no liability for, and Contractor hereby agrees to indemnify City against, any causes of action, claim, liability or costs, including attorney's fees, arising in whole or part out of the furnishing of such first aid facilities or assistance to Contractor's employees, subcontractors, representatives or other personnel, or out of the failure to furnish such facilities or assistance. Records, Inspection and Audit 5.17. During the course of Work being performed, Contractor and any of its subcontractors, shall maintain and retain, not less than three (3) years after completion thereof, complete and accurate records of the Contractor's costs which are chargeable to the City under this Agreement. City or its designated, authorized representatives, shall have the right during this three (3) year period, Page 10 of 19 upon written reasonable notice, to inspect and audit those records. Such records to be maintained and retained by the Contractor shall include: (a) payroll record accounting for the total time distribution of the Contractor's employees working full or part time on the Work (to permit tracing to payroll payments in cash); (b) invoices for purchases, receiving and issuing documents, and all the other unit - inventory records for the Contractor's stores, stock or capital items; (c) paid invoices and canceled checks for material purchased and for the' subcontractor's and any other third parties' charges; and (d) any other documentation City deems necessary to support costs and charges under this Agreement. Corporate Conduct 5.18. Contractor, its employees, agents or representatives shall not offer or give to an officer, official or employee of City gifts, entertainment, payments, loans or other gratuities to influence the award of a contract or obtain favorable treatment under this Agreement or any other contract. Standard of Care 5.19. Contractor agrees that all Services provided will be conducted by the principal and competent staff members, if any, under the supervision of the principal, and that Services will be performed and rendered diligently. Contractor represents that it has, or shall secure, at its own expense, all personnel required to perform Contractor's Services under this Agreement, but at all times shall be responsible for the Services of such personnel. Contractor may not employ any subcontractor without the prior written approval of the City. Indemnity Process 5.20. The City shall notify Contractor in writing of any suits, claims or demands covered by any indemnity contained in this Agreement. Promptly after receipt of such notice, Contractor shall assume the defense of such claim with counsel reasonably satisfactory to City. If Contractor fails, within a reasonable time after receipt of such notice, to assume the defense with counsel reasonably satisfactory to City, or if, in the reasonable judgment of City, a direct or indirect conflict of interest exists between the parties with respect to the claim, or if in the sole judgment of City the assumption and conduct of the defense by Contractor would materially and adversely affect City in any manner or prejudice its ability to conduct a successful defense, then the City shall have the right to undertake the defense, compromise and settlement of such claim for the account and at the expense of Contractor. Notwithstanding the above, if the City in its sole discretion so elects, City may also participate in the defense of such actions by employing counsel at its expense, without waiving the Contractor's obligations to Page 11 of 19 indemnify or defend. Contractor shall not settle or compromise any claim or consent to the entry of any judgment without the prior written consent of the City and without an unconditional release of all liability by each claimant or plaintiff to the City. Treatment of Confidential and Proprietary Information 5.21. For ten (10) years after the effective date of this Agreement, Contractor shall refrain from using any Confidential or Proprietary Information except in connection with the Work or from disclosing it to any third party other than to employees of Contractor who require it in performance of the Work and except to such other third persons as City may authorize in writing. If disclosure to such an employee or to other third persons is so authorized, Contractor shall enter into with said party a confidentiality agreement containing provisions with respect to use and disclosure of Proprietary Information substantially the same as those contained in this Agreement. 5.22. Contractor shall take reasonable precautions to safeguard any documents containing Proprietary Information which City may supply to Contractor hereunder. Contractor may copy, in whole or part, such documents to the extent necessary for the performance of the Work, and Contractor shall return to City upon the completion of the Work or request by City all such documents and copies. 5.23. Except as expressly permitted by prior written consent of the City, Contractor and/or its subcontractors shall not disclose, permit the disclosure of, release, disseminate, or transfer, whether orally or by any other means, any part of such Confidential Information to any other person or entity. Contractor and/or its subcontractors shall return any written Confidential Information and all copies made of such items to the City upon the City's written request, but in any event not later than the date that Contractor has performed all Work to be performed pursuant to this Agreement. Contractor hereby agrees that such Confidential Information and any documents provided may be used by Contractor and/or its subcontractors only as authorized by the City. Contractor shall include a provision in its agreements with subcontractors that binds the subcontractors to this non -disclosure requirement. 5.24. All reports, plans, data, studies, maps, drawings, models, photographs, documents and other writings prepared by and for Contractor, its officers, employees, agents and subcontractors in the course of implementing this Agreement, with the exception of working notes, internal documents and Confidential Information provided by businesses located in City, shall be considered the property of City. Contractor shall deliver such documents and Page 12 of 19 materials to the City as they are generated; however, Contractor may take and retain copies of said documents and materials that are not Confidential Information, as desired. 5.25. All reports, information, data and exhibits prepared or assembled by Contractor in connection with the performance of its Services pursuant to this Agreement are confidential until released by the City to the public and Contractor agrees that such documents shall not be available to any individual or organization without the written consent of the City prior to such release. 5.26. No reports, maps, or other documents produced in whole or in part under this Agreement shall be the subject of an application for copyright by or on behalf of Contractor. Compliance with Authority 5.27. Contractor shall comply with all laws, regulations, executive orders and other applicable requirements of any governmental agencies having jurisdiction including the Fair labor Standards Act, the Occupational Safety and Health Act and all those relating in any way to employment practices and protection of the environment. Contractor shall not discriminate against any employee or any applicant for employment for reasons of race, color, creed, religion, sex, sexual preference, age or national origin. 5.28. Contractor shall make timely payment of all employment taxes and of all social security and other contributions of every kind required to be made with respect to or measured by the wages and salaries of persons employed by Contractor. 5.29. Contractor shall indemnify City against, and hold City harmless from, any liability or loss including liability or loss from fines or penalties arising out of Contractor's failure to perform the obligations imposed upon it by Sections 5.2 and 5.28 of the Agreement. Progress Reports 5.30. Contractor shall meet with City staff, upon City's request, or as needed, in order to provide reports or information concerning the Services being performed by Contractor under this Agreement. Contractor's License Classification 5.31. Contractor shall possess all appropriate licenses for the duration of this Agreement. Page 13 of 19 SECTION 6. TERMINATION OF AGREEMENT 6.01. Unless otherwise terminated as provided in this Section, this Agreement will continue in effect until such time as the installation of the two hundred thirty three (233) catch basin devices, is complete and such equipment is in good working order, unless otherwise extended according to the terms and conditions set forth in this Agreement. Non -Default Termination 6.02. City, at its sole discretion, may terminate this Agreement upon thirty (30) days written notice to Contractor and such termination shall be effective in the manner specified in such notice and shall be without prejudice to any claim that either party may have against the other. During the thirty (30) day period after such notice is sent, the parties shall continue to act toward each other in good faith. 6.03. In the event of any such termination, in full and complete settlement for the termination of the Work, City shall pay Contractor for those Services performed prior to the date of delivery of the termination notice, plus compensation for (i) necessary Work performed during the notice period and authorized in the termination notice, and (ii) all costs reasonably and necessarily incurred by Contractor directly attributable to termination which could not reasonably have been avoided and for which Contractor is not otherwise compensated that are incurred through the date of termination and effectuating the termination ("Termination Expenses"). Termination Expenses shall not include lost profits, lost opportunities, consequential damages, or the like. In no event shall total payment exceed the Contract Price. Termination on Occurrence of Stated Events 6.04. This Agreement will terminate automatically on the occurrence of any of the following events: A. Bankruptcy or insolvency of either party; or B. Sale of the Contractor; or C. Assignment of this Agreement by Contractor without City's written consent. Page 14 of 19 Termination for Default 6.05. If Contractor defaults in the performance of this Agreement or materially breaches any of its provisions, City may immediately terminate this Agreement by giving written notification to Contractor indicating the effective date of such termination. Termination will take effect immediately upon the date specified in the notification. For the purposes of this paragraph, material, breach of this Agreement includes, but is not limited to, the following: A. Contractor's failure to perform, in a manner satisfactory to the City in its sole discretion, the Services specified in Section 3 of this Agreement; or B. Contractor's material breach of any obligation or provision contained in Section 5 of this Agreement. 6.06. The waiver by either party of a breach or default by the other party shall not be deemed a waiver of any different or later breach; nor shall any delay or omission by either party to exercise any right it may have hereunder operate as a waiver of any breach or default of such a right. The failure of either party to this Agreement to exercise any of its rights under this Agreement does not constitute a breach thereof and shall not be deemed to be a waiver of such rights or a waiver of any subsequent breach. 6.07. In the event of any termination of this Agreement or reduction in the scope of the Work, Contractor shall not be entitled to damages for loss of profits for the unexecuted portion of the Work or any other damages because of such termination or reduction. SECTION 7. GENERAL PROVISIONS Notices 7.01. All notices, approvals, consents and other communications between the parties shall be in writing, and shall be sent by fax or by certified mail (return receipt requested) to the respective addresses set forth below, or at such other address as may be furnished by either party to the other in writing. Faxed notices, confirmed by copy thereof, shall be deemed communicated as of the day the facsimile was sent. Mailed notices will be deemed communicated as of the day of receipt or the third (3rd) day after mailing, whichever occurs first. Page 15 of 19 Contractor — G2 Construction Attn-. John Alvarado 13331 Garden Grove Blvd., Unit H Garden Grove, CA 92843 Fax: 714-748-4244 Telephone: 714-448-8080 City — City of Vernon Attn: City Administrator 4305 Santa Fe Avenue Vernon, CA 90058 Fax: 323-826-1438 Telephone: 323-583-8811 Entire Agreement of the Parties 7.02. This Agreement supersedes any and all agreements, either oral or written, between the parties with respect to the rendering of Services by Contractor for City and contains all of the representations, covenants, and agreements between the parties with respect to the subject matter of this Agreement and the rendering of those Services. Each party to this Agreement acknowledges that no representations, inducements, promises, or agreements, orally or otherwise, have been made by any party, or anyone acting on behalf of any party, which are not contained in this Agreement, and that no other agreement, statement, or promise not contained in this Agreement or a subsequent amendment or change order shall be valid or binding. No amendment or change in the provisions of this Agreement shall be made, except in a formal written amendment signed by Contractor and an authorized representative of the City, or in a written change order. Contractor expressly waives all claims for compensation based upon quantum merit, implied contract or oral contract. Each party represents and warrants that it has read and fully familiarized itself with this Agreement, and that such party has been fully authorized to sign this Agreement. 7.03. This Agreement shall be comprised of these included provisions, together with Exhibits A and B, which are all attached. In the event of conflict between this Agreement and any of the exhibits, including the Proposal, this Agreement shall prevail. Partial Invalidity 7.04. If any provision of this Agreement is held by a court of competent jurisdiction to be invalid, void, or unenforceable, the remaining provisions will continue in full force and effect without being impaired or invalidated in any way. Page 16 of 19 Law and Arbitration 7.05. All disputes arising out of or related to this Agreement, the conduct of either party in connection with this Agreement, and the relationship and rights of the parties in connection with this Agreement, whether characterized as breach of contract, tort, or otherwise (except for those requesting injunctive relief) shall be determined by binding arbitration in accordance with the terms of this Section. The submittal of all matters to arbitration in accordance with the terms of this Section is the sole and exclusive method, means and procedure to resolve any and all claims, disputes or disagreements arising under this Agreement, except for claims by either party which seek injunctive relief, which claims shall be resolved by suit filed in the Superior Court of Los Angeles County, California, the decision of which court shall be subject to appeal pursuant to applicable law. The parties hereby irrevocably waive any and all rights to the contrary and shall at all times conduct themselves in accordance with the terms of this Section, relying on arbitration as the sole means of resolution of disputes. Arbitration of all matters required to be arbitrated hereunder shall take place before a panel of three retired judges of the Superior Court of the State of California (the "Arbitrators") under the auspices of Judicial Arbitration & Mediation Services, Inc. ("JAMS"). Such arbitration shall be initiated by the parties, or either of them, within ten (10) calendar days after either party sends notice of a demand to arbitrate (the "Arbitration Notice") to the other party and to JAMS. The Arbitration Notice shall contain a description of the subject matter of the arbitration, the dispute with respect thereto, the amount involved, if any, and the remedy or determination sought. Eachparty shall select a retired judge from the JAMS panel, and the two selected judges shall mutually agree on the third retired judge from the JAMS panel. If one of the parties does not select a retired judge from the JAMS panel within fourteen (14) calendar days after receipt of the Arbitration Notice, JAMS will select the second judge, and the judge selected by JAMS and the judge selected by the other party will select the third judge for the panel. The third judge is to be selected within ten (10) calendar days following the selection of the first two judges. The three judges will together serve as the Arbitrators. The arbitration shall be conducted in Los Angeles, California. Any party may be represented by counsel and/or other authorized representative. In rendering a decision(s), the Arbitrators shall determine the rights and obligations of the parties according to the substantive and procedural laws of the State of California and the terms of this Agreement. The decision of the Arbitrators shall be based on the evidence introduced at the hearing and accompanied by a written statement of decision as to each of the principal controverted issues. The agreement of two of the three Arbitrators as to the resolution of the dispute shall be a conclusive resolution. The Arbitrators shall deliver the written decision to the parties within thirty (30) calendar days following the date of the selection of the last of the Arbitrators. The decision shall be conclusive and binding, and it Page 17 of 19 may thereafter be confirmed as a judgment by the Superior Court of the State of California, subject only to challenge on the grounds set forth in the California Code of Civil Procedure Section 1286.2. The validity and enforceability of the decision of the Arbitrators is to be determined exclusively by the California courts. Attorney's Fees 7.06. In the event a dispute, claim or litigation arises regarding this Agreement, the prevailing party shall be entitled to reimbursement for reasonable attorneys' fees and actual costs, which may be set by the arbitrators or the court in the same action or in a separate action brought for that purpose, in addition to any other relief which is obtained. 7.07. Neither party shall be considered in default in any of its obligations under this Agreement when a failure of performance shall be due to an uncontrollable force. The term "uncontrollable force" shall mean any cause beyond the control of the party affected, including, but not restricted to, flood, earthquake, storm, fire, lightning, epidemic, war, riot, civil disturbance or disobedience, federal, state, or municipal action, statute, ordinance, or regulation, embargoes of the United States Government or any other government, which by exercise of due diligence such party could not reasonably have been expected to avoid and by exercise of due diligence has been unable to overcome. Either party rendered unable to fulfill any of its obligations under this Agreement by reason of an uncontrollable force shall give written notice within five (5) business days of such fact to the other party and shall exercise due diligence to remove such inability with all reasonable dispatch. 7.08. Except as may otherwise be specifically provided herein, this Agreement may be modified or amended only by a written document executed by both Contractor and the City and approved as to form by the City's City Attorney. 7.09. The captions used in this Agreement are for convenience only and shall in no way define, limit or describe the scope or intent of the Agreement or any part thereof. Page 18 of 19 7.10. City reserves the right to award similar contracts to multiple contractors to ensure the City has adequate services. IN WITNESS WHEREOF, the parties have executed the Agreement on the dates shown below. City: City of Vernon Ilan Leonis C. Malburg, Mayor Date: APPROVE AS TO FORM: Je . H son, City Attorney Contractor: G2 Construction Inc. i//!NW;'m - �� Jr Date: A TEST: 2zf,l X��' Manuela Giron, City Oerk Date: i - q - 0 q Page 19 of 19 I EXHIBIT A G2 Construction Inc. State contractors license #801263 - A. C8, C60 13331 Garden Grove Blvd. unit H Garden Grove, CA 92843 Proposal - "Collector Pipe Screens" Customer: City of Vernon Prepared: 4/10/2008 4305 santa fe Ave. Vernon, CA 90085 By: John Alvarado Phone: 323-583-8811 Phone: 714.448.8080 Fax 323-826-1435 ialvarado0o2construction com Contact: Mr. Sherwood Natsuhara P.E. Project Location: Various locations in Vernon G2 Proposes to install "Collector Pipe Screens" per L.A. County Public Works design. The units will be constructed of Stainless Steel 5mm perforated material. The units will be installed in various sizes and shapes according to individual catch basin locations Upon receiving a list of target locations - G2 will provide a preliminary report and photographs of before and after on all locations. All locations will be confirmed or addressed with Vernon Public Works prior to work commencing. Quantity Unit Price Extended 1). Collector Pipe Screens 233 ea. $ 885.00 $ 206,205.00 Covers sizes - 18" to 48" discharge pipes Project Price $ 206,205.00 Notes; G2 will provide all required labor, materials and hardware to complete the CPS project. All catch basins to be cleaned prior to installations Traffic Control lane closures will be on a time and equipment basis. Any special required fees and permits may be additional. Purchase Order # Authorized Signature: Purchase Order Amount Fax signed proposal to 714-748-4244 Date: r�7 NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 1� 1� 9th St lFront / Side L I Straight �M 9th St. 132 60 36 12 Front / Middle Rounded 9th St. 132 60 32 12 Front / Side Straight 00 9th St. lFront / Side I Straight 00 9th St. lFront / Middle IRounded 0© 9th St. lFront / Middle Rounded 00 9th St. I132 49 32 12 Front / Middle I IRounded �® 9th St. I131 50 48 12 Front / Side Straight 00 9th St. 132 48 53 18 Front / Middle Sloped Rounded 10 9th St 1132 60 43 12 Front / Side I Shelf Rounded 12 9th St. 125 44 36 12 Front / Side= I Sloped Straight 15 131 9th St. 50 DE]= lFront /Side Straight 16 9th St. I 132 50 39 12 Front / Side IStraight 0 17 9th St. lFront / Side Straight 0 18 9th St. 177 50 30 12 Front / Side Straight 19 51 st St. lFront / Middle IRounded 20 51 st St. I 180 45] lFront / Middle Rounded 21 51 st St. lFront / Middle IRounded 22 51 st St. lFront / Middle Rounded =EM151 st St. lFront / Middle Rounded 24 51 st St. I184 46 38 12 Front / Middle Rounded EE151 st St. 180 46 38 12 Front / Middle Rounded 26 51 st St. 182 48 48 12 Front / Midqle_j IRounded 27 52nd St. lFront / Side IRounded 28 52nd St. lFront / Side IRounded N EW CATC H BAS I N DATA S H E ET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 29 52nd St. 132 45 41 12 Front /Side Straight 0 30 52nd, St. —� 132 48 36 12 Front / Side Rounded 31I 152nd St. IFront / Side IRounded M 52nd St. lFront / Side j IRounded �1 33 52nd St. 132 48 48 12 Front /Middle Rounded =EE152nd St. 180 46 29 12 Front / Side IStraight 1�F-T61152nd St. IFront / Side Sloped Rounded 1� 37 52nd St. IFront / Side I I IRounded 1�F3fl 152nd St. 264 48 39 12 Front / Side Straight 1� 39 52nd St. 264 48 38 12 Front / Side Rounded 42 57th St. 113ack / Side IRounded 0� Santa Fe Ave. 129 .48 28 12 Front / Middle Rounded ,00.00 2 E_ Santa Fe Ave. IFfont /Middle Rounded Santa Fe Ave. 9:6 45 ' 28 12 Front /'Side ' Rounded Ma Santa Fe'Ave. IFront / Middle - Rounded 0= IPacific at Santa Fe Ave E32 ® Front / Side I j FTo—unded 0M ernon Ave. e/o Santa JEM=== IFront / Side IStraight 0E-5--1 2850 Vernon Ave. lFront / Middle Rounded 0� Soto St. s/o Vernon60 44 62 12,8,8 Side / Midle IRounded 0® Soto St. e/o Verno= EKI42 54 ®O IFront/ Side Sloped Straight �F-9 I ernon Ave. at Soto 100 48 54 12 Front / Middle Rounded 11 ernon Ave. at Seville I IFront / Middle Rounded 13 37th e/o Seville 170 38 40 20 Front /Side Rounded 14 37th w/o Soto 130 44 42 0 Front / Corner Straight 0 L15J 137th e/0 Soto 96 42 40 12 Front / Middle Rounded MEE137th e/o Soto 96 44 48 12 Front /Middle Rounded [:K]M ISeville at 37th 96 48 ` I =E12 Front / Middle IRounded NEW CATCH BASIN DATA SHEET New Section CB No. Location Lateral Lateral Floor Length Width Depth Size Connection Configuration Screen Style 18 Seville s/o 37th I lFront / Middle I I Rounded 0 20 ernon Ave. e/o Santa 117ront / Middle I I Rounded 0 21 ernon Ave. w/o Santaj Front / Corner Straight =]EMIln front of City Hall lFront / Side IRounded 3 00 24 Santa Fe Ave / west _ � 96 DODO 44 29 8 Front / Middle Rounded EE Ell Ivernon Ave. at Furlong ISide / Midle I Straight E 38th at Irving 48 48 48 ® lFront / Middle Rounded El a] 138th at Irving 48 48 72 ®Side / Midle Rounded ®M 138th at Irving 96] E18 Front / Side I = I F-Straight ®© Irving 96 18 41 15 Front / Middle Rounded ®0 Irving EE 48 34 DEJ lFront / Middle. Rounded 0® 38th.at Irving 60 48 34 0 Side / Midle Rounded .38th a/o'Santa Fe '�6 44 52 12 Side / Midle Rounded Q 37 e/o Santa: Fe =` 132: 48 34' 12 Front / Side '' ;'SI'oped Straight: a] El 137th e/o Santa Fe " " 132` 46 38 12 Front / SldEl I IStraight 0EE 37th e/0 Santa Fe E38 lFront / Side I Straight 0© 37th at Soto lFront / Middle Rounded 37th e/o Santa Fe. I EH]30 46 12 Front / Middle IRounded ©� 26th St. e/o Santa E12 Front / Middle i IRounded 0®26th St. at Harriet 66 33 == lFront / Middle I = I LRoundedi 00 26th St. at Harriet lFront / Middle Rounded �© Harriet at 26th St. JFront / Corner I IStraight Harriet at 26th St. ISide / Midle Rounded ©F-9--126th St. at Minerva I132 53 36 18 Front / Middle I I IRounded 10 26th St. e/o Santa Fe 96 48 26 12 Front /Middle Rounded 0© Soto St. 68 44 40 MIFront / Middle Rounded 8A = . 5th at Pacific ISide / Corner I IStraight NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 8A 0 5th at Pacific lFront / Side Sloped Straight 8A 0 Leonis e/o Pacific lFront / Side Straight 8A ® Seville at 46th lFront / Side Straight 8A 0 Seville n/o 46th lFront / Corner Straight 8A 13 Seville s/o Vernon lFront / Corn—erj I Sloped Straight 8A 14 5th at Seville Side / Midle 8A 15 5th at Seville ISide / Corner Straight 8A 16 5th at Seville lFront / Side I F—Shelf Straight $A 17 Seville n/o 46th lFront / Side ----I . EN= ISeville, at 46th LL05J lFront / Side Sloped Straight 8 B 22 50th e/o Soto 90 43 44 16 Front / Side IRounded 8 B 00 23 50th e/o Soto �6 _.0.00. 0 50 42 16 , Front /:Side `.. Rounded 00 8C 24. 50th St-W/0'Downe Y ' ` 1 1 0 38 �; 27 � � .16' Front /� Side Slo" ed.. Rounded _: p ��.. 8C 27 00 50th 1WbAlcoa . ' 1 2 DODO. 43 56 18' ` 'Front /#Side 8 C 28 50th w/o Alcoa 132 46 40 18 Front/'Side Rounded EE=Ivernon Ave IFront / Middle Rounded Boyle at Vernon 96 59 53] E1E ISide / Corner Straight 00 ernon Ave. 96:] lFront / Middle IRounded 00 ernon at Alcoa 84 38 52] ISide / Midie Sloped Rounded �© ernon at Alcoa L96j lFront / Middle Rounded 00 ernon Ave IFront /Middle Rounded 0® ernon Ave. lFront/ Corner Straight 00 ernon Ave. 96 32 56 12 Front / Side Rounded 0 M Ivernon Ave 96 43 45 12 Front / Middle Rounded 11 Soto at Vernon ISide / Midle Straight 10iyernon at Downey lFront / Middle IRounded 10iyernon at Downey 96 45 80 16 Side / Corner jStraight NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 10 [I] Downey s/o vernon2___JE96E62== lFront / Middle IRounded 10 Downey s/o Vernon__]96 44 64 16 Front /Middle Rounded 1`0 0 Downey n/o Packers 72 ISide / CornerI I Straight Elfl © IDowney n/o Packers 96 43 58] lFront / MidKej I IRounded 10 10 Downey n/o Leonis lFront / MiddleI I FR—ounded 10 11 Downey at Leonis j ISide / Midle Sloped IRounded 10 12 Leonis at Downey jBack / Midle Rounded 10 14jAlcoa s/o 46th lFront / Middle Rounded 10] lBoyle at 46th I I96 50 42 12 Front / Middle Rounded 10 16 Icoa at 44th 72 EKJ Ej2jFront / Corner Rounded 10 17[Alcoa at 44th 96:] E12 Front / Corner IStraight 10 18 4th_ at Alcoa. 96 43 68 . 12 Front / 'Corner - Straight 10 19. 0 4th e/o Boy -le 96 :49 41 12 t / F ron'Middle , Rounded 10 ,,.20- 4th at-Alcoa 00�0 43 43' " 12 Front /;Middle``` Rounded- 10 21 Boyle at46th 102' 44 60 12 Front /'Middle Rounded 10 22JAIcoa s/o 46th 98 46 62 12 Front / Middle Rounded 10 25 Boyle at 46th lFront / Middle I IRounded 10 26 Boyle Ave. 96] E12 Front / Middle IRounded 10 27 4th at Boyle lFront / Middle Rounded 10 28 4th E/O Soto lFront / Middle Rounded 10 29 4th e/o Soto lFront / Middle Rounded 10 30 4th at Boyle 96 42:] lFront / Middle Rounded 10 31 6th at Boyle ISide / Corner Straight 10 32 6th w/o Boyle lFront / Middle I Rounded 10 33 6th at Soto 96 43 31 E12 Front / Middle Rounded 10 34 6th w/o Boyle 96:] ER]Ej2j JFront / Middle Rounded -10 35 6th at Boyle ISide / Midle Rounded NEW CATCH BASIN DATA SHEET New Section CB No. Location Length Width Depth [52l Lateral Size 18 IlBack/Side=l Lateral Connection Floor Configuration Sloped Screen Style Rounded [E]MILeonis at Boyle 10 37 Leonis w/o Boyle 106 43 38 20 Back / Midle Rounded [HIMLeonis at Boyle.,—� 84 37 45 15 Front / Middle I IRounded a]E4fl JLeonis at Alcoa. 84 38 42 18 Side/ Corner Straight ElEMILeonis at Downey =E9E47E43=Side / Midle Straight 13 0 26th at Ayers 180 43 ISide / Midle Rounded 13 3� 26th at Ayers 188 60 =EHI lFront / Side Rounded 13 ®26th at Bonnie Beach L16__JEjE,Front /Corner I FStraight 13 0 26th at Bonnie Beach 137 43 36 16 Side / Midle I IRounded 13 ©26th at Bonnie Beac IFront / Corner I IStraight 13 , 0 26th w/o Bonnie Beach E52 E12 Front / Corner I F_Rounded -0013 .10 Bonnie Beach : _0 16 48 36 12 :� Front/ Side : _. Rounded 13 11 0-0. Bonnii Beach 134 ,000�_ 48 40 . 12` Front F-Side ` Rounded „ 13 0` 12 Sunol a# Band'rni . 100 50 36 18 Front /yMiddle Rounded 13 15 yers 268 50 35 18' Front /'Corner Straight 13 16 yers I 135 54 25 18 Front / Side-7 CI Rounded 13 Mj jAyers 185 E30 lFront / Corner IStraight 13 19 Sunol 84 38 47 18 Front / Side Straight 14 0 Charter IFront / Middle Rounded 14 m Charter IFront / Corner Straight 15 0 Loma Vista 96 48 43 18 Front / Corner Straight 15 Exchange 132 48 48 12 Front /Corner Sloped Straight 15 0 Exchange 96 50 54 18 Front / Middle Rounded 15 ® Charter 135 46 39 12 Front / Side Sloped Rounded 15 0 Charter 174 46 33 12 Front / Corner Straight 15 0 9th St. 132 60 32 12 Front / Middle IRounded EM= JExchange 96 49 65:] IFront / Side Rounded NEW CATCH BASIN DATA SHEET New Section C13 No. Location Length Width Depth Lateral Size Lateral Floor Connection Configuration Screen Stvle 15 ® Exchange 180 48 38 12 Front / Middle IRounded 15 F 10 IlMaywood 132 46 51 12 Front / Side Straight 15 11 Maywood 135 46 39 12 Front / Corner Straight 15 12 Loma Vista =E96 48 == IFront / Corner IStraight E1flM IDistrict at Maywood= 256 =E60 M IFront / Side Rounded 16 District 176 45 60 12 Front / Side Straight 16M IDistrict at Everett 132 46 64 12 Side / Midle Rounded 16 © District 132 48 54 12 Front / Middle I Sloped Rounded 16 District e/o Loma Vista 180 84 60 12 Front / Side Rounded 16 ® District e/o Loma Vista F-f4-j M Irront / Side I t ==JDistrict 96 43 36 12 Front / Side I Rounded 16 12 District. L26j48 36li2j IFront / Side Rounded 16 13. ; District TEK -1'6 '14 ` District:�..' 48 jF1-ont /:Side .. :96 43 40 -' 12' `Front / Middle Straight: , Rounded.,• . EIE_L5j JDistrict 267 44 43 12' Front /'Side Rounded 16 E16 District at 50th EEI [=112 Front / Side Straight E16EM IDistrict 180 48 37 12 Front / Side Rounded 16 18 District IFront / Side Rounded E16M IDistrict 55 48 34 12 Side / Midle Sloped Rounded 16 21 District 100 45-EME= IFront / Side Sloped Rounded 16 22 District 136 45 32 12 Front / Side Sloped - Rounded 16 23 District 180 45 39 E12 Front /Side I Sloped Straight =EHIlDistrict I EH]44 40 12 Front / Corner Straight 16 25 District EKI 37 12 Front / Corner Straight 16 26 District 128 48 35 12 Front /Side Straight EHIEMIDistrict EKI 12 Front / Corner Straight. 16 28 District 128 EKI 43 D11 lFront / Corner I I Straight NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 16 29 District 176 48 53 12 Front / Corner Straight 16 30 District IFront/SidL_j IRounded 16E3fl IDistrict lFront / Sid Rounded EEM IDistrict 180 48 36] IFront / Side IRounded EHIMIDistrict IFront / Corner Straight == IDistrict lFront /Side Rounded EEMIDistrict w/o Loma Vista lFront / Side Rounded EE]EMIDistrict at Everett IFront / Corner IStraight EflMIDistrict IFront / Side IRounded 17 0 9th e/o Everett IFront / Corner I F- =] 9th at Everett Ct. 96] IFront / Corner IStraight 1.7 00_ 5 9th at. Loma Vista 96 0 48 0.�:.0 67 . 18 . Front / Middle Rounded 17 6.. � 9th at Loma Vista 96 � ' 48 44�. ..18 - Frort /;Middle. Rounded '17` 0' 9th at'Everett Ct. 96 48 39 18 Front/ Side Rounded 17 ® 9th e/o'Everett 96 42 38 18 Front'/ Middle IRounded 18 8th e/o Loma Vista 134 51 52:] ISide / Midle Straight 18 8th e/o Loma Vista I ISide / Corner Straight 18 © 8th e/o Loma Vista ---] EKI 18 Front / Sid-e7j IRounded 18 10 9th e/o Loma Vista IFront / Corner Straight 18 11 9th e/o Loma Vist IFront / Side Rounded 18 12 9th e/o Loma Vista 98 51 36 18 Front / Side Straight 18 13 50th w/o Gifford 84 38 IFront / Side Rounded 18 E14 50th e/o Corona 84 38 64 18 Front / Middle IRounded 18 15 50th e/o Corona IFront / Corner I IStraight 18L_L6j I50th e/o Loma Vist lFront / Corner Straight 18 M 150th e/o Loma Vista 97 102 =E]E JFront / Corner IStraight EMM150th e/o Loma Vista IFront / Corner Straight NEW CATCH BASIN DATA SHEET New Lateral Lateral Floor Section CB No. Location Length Width Depth Size Connection Configuration Screen Style 18 19 50th E/O Loma Vista EM, 38 42 EEI IFront / Corner Straight 18 20 50th e/o Loma Vista 84 38 42 18 Front / Corner Straight 18 21 50th w/o Corona 84 38 42 18 Front / Side Rounded 18 22 50th e/o Corona IFront / Corner Straight 18 23 50th e/o Corona 97 49 41 E1E IFront / Middle Rounded 18 M 150th e/o Corona 97 52 42 18 Front / Corner Straight 18 M IGifford s/o 50th IFront / Corner Straight 18 M IGifford s/o 50th 97 IFront / Middle Rounded EHIEMIGifford s/o 50th 1= EEI 18 Front / Middle Rounded 18 M IGifford s/o 50th IFront / Middle Rounded 19 1� IlDistrict at Atlantic 98 43 56Ej2j IFront / Middle Sloped Rounded - 19 District at Atlantic 97 60 54 12 Back / Midle Sloped Rounded 19 lDistrict at Fruitland 97 50 65 12 Front / Middle Rounded 0 EKl EO� 23 Bandini e/o Atlantic' 120 38 46 18 Front / Mid'dle Rounded 23 Bandini e/o Atlantic 82 38 72 18 Front / :Corner Straight 23 0 n/o Bandini e/o Atlantic IFront / Corner Straight 23 ®n/o Bandini e/o Atlantic 42 38 54 24 Front / Corner I IStraight n California Regional Water Quality Control Board Los Angeles Region 320 W. 4th Street, Suite 200, Los Angeles, California 90013 Linda S. Adams Phone (213) 576-6600 FAX (213) 576-6640 - Internet Address: http://www.waterboards.ca.goy/losangeles Arnold Schwarzenegger Cal&PA Secretary Governor August 1, 2007 Mr. Donald Wolfe, Director County of Los Angeles Department of Public Works 900 South Fremont Avenue Alhambra, CA 90803-1331 CERTIFICATION OF THE CONNECTOR PIPE SCREEN DEVICE AS A FULL CAPTURE SYSTEM FOR TRASH REMOVAL UNDER THE BALLONA CREEK AND THE LOS ANGELES RIVER TRASH TOTAL MAXIMUM DAILY LOADS Dear Mr. Wolfe: We have reviewed the County of Los Angeles' (County) letter and report entitled, "Technical Report, Connector Pipe Screen Design, Full Capture TMDL Compliance, Screen And Bypass Sizing Requirements" dated October 17, 2006, and April 2007, and additional information provided by your staff in support of your request for "Full Capture Certification" for a trash capture device referred to as a "Connector Pipe Screen Design." The purpose of this letter is to inform you of our approval of the County's Connector Pipe Screen Design as a "Full Capture System" for use within catch basins as; a trash capture device under the Ballona Creek and the Los Angeles River Trash Total Maximum Daily Loads. A Connector Pipe Screen is a vertical stainless screen with 5 mm openings, installed inside 'a catch basin directly upstream of the, connector pipe in such a manner that all water entering the basin must pass through the device. A vertical opening is provided around the perimeter of the screen to allow storm water to bypass in the event of a large storm or if the screen becomes clogged. The definition of "full capture system" for the Ballona Creek Trash Total Maximum Daily Load (TMDL) was amended per Resolution No. 04-023 adopted on March 4, 2004 by the Los Angeles Regional Water Quality Control Board. It is likely that this definition will be applicable in future revisions of the Los Angeles River Trash TMDL. As a result, .the Los Angeles Water Board staff have also analyzed your Report for compliance with the Ballona Creek Trash TMDL's full capture system definition. The definition of a "full capture system" as defined in the Resolution No. 04-023 as the following: A full capture system is any single device or series of devices that traps all particles retained by a 5 mm mesh screen and.has a design treatment capacity of not less than the peak flow rate (Q) resulting from a one-year, one -hour, storm in the subdrainage area. Rational equation is used to compute the peak flow rate: Q = C x I x A, where Q = design flow rate (cubic feet per California Environmental Protection Agency Co Recycled Paper Out -mission is to preserve acid enhance the quality of California's water resources for the benefit of present and future generations. Mr. Don Wolfe, Director - 2 - August 1, 2007 County of Los Angeles Department of Public Works second, cfs); C = runoff coefficient (dimensionless); 1= design rainfall intensity (inches per hour, as determined per the rainfall isohyetal map in Figure A), and A = subdrainage .area (acres). " The Los Angeles Water Board's criterion for certification as a full capture device is that'it must trap all particles retained by a 5-mm mesh screen, and have a treatment capacity exceeding peak flow rate resulting from a one-year, one -hour, storm in the subdrainage area. In addition, the following requirements must be met: 1. End -of -Pipe Configuration - Certain BMPs, which can create a pressure drop, must have an end -of -pipe configuration and not rely on diversion weirs; 2. Adequate Pipe Sizing - The pipes carrying the flows from the subdrainage area should be able to handle peak flows; and 3. Regular Inspections and Maintenance -.The full capture system must be regularly . inspected and serviced to continually maintain adequate flow through capacity. Summary of the County of Los Anaeles' Hydraulic Analvsis Staff from the County of Los Angeles Department of Public Works (Public Works) performed a hydrologic analysis to establish a method of calculating the maximum treatment flow resulting from a one-year, one -hour storm. With this information, extensive hydraulic analyses were conducted using different types and sizes of trash and debris to establish. minimum sizing requirements for the CPS screen. Public Works engineers also established minimum sizes for the bypass opening to provide flood protection during large storm events. Based on the County's Technical Report submitted on October 17, 2006 and revised in April 2007, (Report), the above -mentioned device_ meets the performance criteria for full capture certification. Summary of the Countv of Los Angeles Information Submitted Based on the County's Report,. the Connector Pipe Screen has a 5 mm mesh screen and meets the particle capture criteria for a full capture system. The devices are designed for greater than a 1-year, 1-hour peak flow, and therefore satisfy the minimum 1-year, 1-hour design criteria;. 'The flow capacity of the devices is greater.than the estimated flow rate, therefore the Connector Pipe Screens meet.the design criteria for a full capture system; The ,drainage criterion is not part of the definition for a full capture system. However, it is important t6 note that the inserts do not retain storm water and therefore avoid any vector issues; and The Gross Solids Storage Capacity ranges depending on the size of each catch basin and its configuration. Some trash capture' Connector Pipe Screens may require cleaning more frequently. California Environmental Protection Agency CO Recycled Paper Our mission is to preserve and enhance the quality of California's water resources for the benef i of present and future generations. Mr. Don Wolfe, Director - 3 - August 1, 2007 County of Los Angeles Department of Public Works Based on the above information, the County of Los Angeles' Connector Pipe Screens meet the definition of full capture system and are certified as a full capture system under the following conditions: I. Adequate Pipe Sizing: The pipes carrying the flows from the subdrainage area must be able to handle peak flows. 2. Regular Inspections: The Connector Pipe Screens should be visually inspected before and after rain events to allow for cleaning for optimal performance. 3. Regular Maintenance: The Connector Pipe Screens shall be adequately maintained and cleaned to ensure full capture of trash during the design storm. This letter serves as a determination that the vertical Connector Pipe Screens (as described and identified via photographs in the County's April 2007 Technical Report), when installed and maintained in appropriately sized catch basins, satisfy the full capture definition of the trash TMDL and will allow the systems to be used elsewhere in the region. However, all parties installing these devices will have an on -going obligation to demonstrate that the installation of a particular system - is appropriately sized and meets the intent of this program. Likewise, dischargers will be responsible for on -going maintenance to ensure the systems perform to design specifications. The Regional Water Board will review and consider performance data on a continuing basis. In the event data demonstrate that the systems are not performing to the full capture design standard established by the trash TMDL, the Los Angeles'Water Board Executive Officer reserves the right and ability to rescind the certification for subsequent installations deemed non -conforming or inappropriate. If you should have any questions regarding this Full Capture Certification, you may call me at (213) 576-6609, or have your staff contact Carlos Urrunaga at (213) 620-2083 or via email at currunaga@waterboards.ca.gov. Sincere , Deborah Smith Interim Executive Officer cc: Mr. Michael Levy, Office of the Chief Counsel, State Water Resources Control Board Mr. Terry Fleming, Water Division, U.S. Environmental Protection Agency, Region 9 Mr. Eugene Bromley, U.S. Environmental Protection Agency, Region 9 Mr. Paul Thakur, Caltrans, District 7 Mr. Mark Pestrella, Los Angeles County Department of Public Works Mr.. 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O O V O O m m N N n 8 0 0 0 O N fp O 0O M N N ("Itp O p Cp� Ln O [O W U o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 H N N .- O Ln In Q N o 0{ o N n N N Ln o O ) o Or oOo 0pp 0 OOoz80o - Np LON0 f0 Q fV O N O O N O N � � N 7I J W¢ W W W W W W W W a J U08o88088SS88o a 0N-oo00So�o O N O N Ln Lr O O Cl Z N 7 OI0 0 Q M 88 m p F ��1 mN�m� mN Nm ZVnZ¢y> W U a w¢� _FUSz)Om¢a¢W¢QZQOOON0N¢ Eraw ZZr��� O O a �' �LLu K¢ w¢ w¢ K¢ ¢fy �DUUUU- W¢ a w aW00000ZtJ 0¢(� e 0W wr0mDD 7O wx E i U K a a¢ a¢ U¢ U a a j WI N M V N t0 n N 0 0--^ O F H E ro J E U TECHNICAL REPORT CONNECTOR PIPE SCREEN -DESIGN FULL CAPTURE TMDL COMPLIANCE SCREEN AND BYPASS SIZING REQUIREMENTS COUNTY OF LOS ANGELES DEPARTMENT OF PUBLIC WORKS April 2007 PREPARED BY DESIGN DIVISION Taejin Moon, P.E., Associate Civil Engineer Josh Svensson, P.E., Associate Civil Engineer DIRECTED BY: Mike Soliman, P.E., Principal Engineer SUPERVISED BY: Jim Thurow, P.E., Senior Civil Engineer Amir Zandieh, P.E., Civil Engineer ASSISTED BY: Richard Weyermuller, P.E., Field Modeling Ben Willardson, P.E., Hydrology Engineering Table of Contents I. Purpose and Scope...................................................................:..................................1 ILAbstract.......................................................................................................................1 III. Background................................................................................................................ 2 IV. Hydrology Study......................................................................................................... 3 V. Catch Basin Flow........................................................................................................ 5 VI. Screen Flow Calculations.......................................................................................... 7 VII. Field Testing............................................................................................................. 8 Vill. Bypass Flow Calculations......................................................................................10 IX. Results............................................................................:........................................11 X. Catch Basins in Series..............................................................................................13 XI. Maintenance Requirements.....................................................................................14 Index of Fiqures Figure 1: CPS inside catch basin.................................................................................... 1 Figure 2. Frequency of runoff ratios resulting from modified rational modeling ............... 4 Figure 3: Catch basin flow for various street slopes........................................................ 5 Figure 4: Catch basin profile........................................................................................... 7 Figure5: CPS Testing ..................................................................................................... 8 Figure6: Field test data................................................................................................... 9 Figure 7. Catch Basin with screen and bypass with zero freeboard..............................10 Figure 8. Minimum clearance due to ARS.....................................................................10 Figure 9: Plan view of catch basin.................................................................................11 Figure 10. Rectangular screen across CB corner.........................................................13 Figure 10A: Same side catch basin in series................................................................13 Figure 10B: Opposite side catch basin in series...........................................................13 Index of Tables Table 1: Storm frequency conversion factors based on rainfall frequencies ................... 3 Table 2: Runoff analyses variables for 1-yr vs. 10-yr...................................................... 3 Table 3. Statistics of Runoff Frequency Ratios Based on Modified Rational Modeling ... 4 Table 4: Catch basin flow (cfs) for various street slopes ................................................. 5 Table5: Maximum Q1-1 flow............................................................................................ 6 Table 6: Field test data .............................:. Table 7: Recommended values for a V=3.5' catch basin..............................................12 I. Purpose and Scope The intent of this report is to establish a conservative sizing criterion for connector pipe screens (CPS) to comply with the Ballona Creek and Los Angeles River Trash Total Maximum Daily Load (Trash TMDL) full capture standard while maintaining the existing level of flood protection for Los Angeles County Flood Control District (LACFCD) facilities. II. Abstract CPS devices are vertically oriented screens installed inside a catch basin (CB), directly upstream of the connector pipe as shown in Figure 1. Connector Pipe Screens are fabricated from 5mm mesh screen and are designed to comply with the Regional Water Quality Control Board's (RWQCB) definition of a full capture system. Engineers from the County of Los Angeles Department of Public Works (Public Works) performed hydrologic analysis to, establish a method of calculating the maximum treatment flow resulting from a one-year, one -hour storm. Using this information, they performed hydraulic analyses to establish minimum sizing requirements for the CPS screen. Public Works engineers also established minimum sizes for the bypass opening, which provides flood protection during large storm events. i-xprni /-uut 1 Design Division M. Background Public Works has been given the responsibility to bring its flood control facilities into compliance with the TMDLs established by the RWQCB. Public Works has undertaken an aggressive testing program to find devices that may be used to retrofit existing flood control infrastructure. Potential devices are tested for their ability to meet the TMDL requirements and to ensure that they do not reduce flood control protection. As defined by the RWQCB, the standard for full -capture status is the following: Compliance with the final Waste Load Allocation may be achieved through a full capture system; which is defined as any device or series of devices that traps all particles retained by a 5mm mesh screen and has a design treatment capacity of not less than the peak flow rate (Q) resulting from a one-year, one -hour storm in the sub -drainage area. (CA RWQCB TENTATIVE RESOLUTION NO. 07-OXX, Sec. 12, page 3, July 12, 2007) A CPS is a vertical screen with 5 mm openings, installed inside a catch basin directly upstream of the connector pipe in such a manner that all water entering the basin must pass through the device. A vertical opening is provided around the perimeter of the screen to allow storm water to bypass in the event of a large storm or if the screen becomes clogged. Connector Pipe Screens are currently manufactured and installed by Advanced Solutions (Stormtek) and American Storm Water (Debris Dam). April 2007 2 Design Division IV. HArology Study Since the majority of LACFCD facilities are designed for a 10-year design storm frequency (Qlo),. the calculations in this report will design the CPS for a CB designed with a 10-year storm frequency. In order to determine the 1-year 1-hour TMDL flow, we need to'establish a conservative conversion factor, k, from a 10-year storm, Q1o, to a TMDL flow (Q1_1) as shown in Equation 1. Equation 9: < k To develop this conversion factor (k), we first compared storm frequency ratios. This involved comparing the magnitude of one 24-hour storm frequency with another 24-hour storm frequency. The results of this analysis are shown in Table 1 as a ratio used to convert one storm frequency to another based only on the 24-hour isohyetal values for different storm frequencies. The ratios are consistent with the ratios provided in the Los Angeles County 2006 Hydrology Manual' for scaling storm frequencies. Storm Frequency Conversion Factor Qx • k = Q1.1 2- r 5- r 10- r 25- r 50- r k 0.413 1 0.274 0.224 1 0.182 1 0.160 Table 1: Storm frequency conversion factors based on rainfall freauencies Based on the conversion of storm frequencies, a value of k = 0.224 would be appropriate for use in the conversion. However, this value does not take into account the changes to runoff that occur due to changes in infiltration rates and times of concentration. To better quantify these hydrologic effects, we used the Time of Concentration Calculator2 to model over 360,000 different hydrologic scenarios of varying storm frequencies and watershed characteristics. Table 2 shows the values used .for the 1-year vs. 10-year flow comparisons. Watershed Parameter Values Used Lengths 1000, 1500, 2000 Area 1 and 10 acres Soils 2 through 180 Sloe 0.01, 0.05, 0.08, 0.10, 0.15, 0.20 Imperviousness 0.15, 0.45, 0.95 10- r Isoh ets 1, 2, 4, 6, 8, 10, 12 Possible Combinations 90,216 Table 2: Runoff analyses variables for 1-yr vs. 10-yr Available from the Public Works website at http://www.ladpw.org/wrd/publication/ 2 An Excel spreadsheet available from the Public Works website at http://www.ladDw.ora/wrd/publication/ April 2007 3 Design Division Hydrologic modeling using the modified rational method provided insight into the combined effects of watershed characteristics on the runoff ratios. The maximum runoff ratio measured in the extensive testing is being used for the k factor. Table 3 contains the maximum value selected for k based on these studies. Statistics 1- r/2- r 1- r/5- r 1- r/10- r 1- r/26- r 1- r/60- r Max�mur 0 3023 0 2021 01846 0 45.: 0 1167 Count 67,662 67,662 j 90,216 67,662 67,662 Table 3. Statistics or Runoff Frequency Ratios Based on Modified Rational Modeling Figure 2 is provided to show the probability distributions of the runoff ratios generated during the testing. Frequency of Modeled Runoff Ratios 25000 20000 15000 c ii U ' 10000 5000 0 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 _ Runoff Ratio 2-yr Ratios 5-yr Ratios 10-yr Ratios -25-yr Ratios 50-yr Ratios rtyuie /-. rrequency or runorr ratios resulting from modified rational modeling Based on a comparison of Table 1 and 3, k values from.Table 1 have been verified to be a very conservative values for converting an n-year frequency storm to a 1-year frequency storm. A 10-year frequency storm conversion is shown in Equation 2. Equation 2: Q1_1 <— 0.22 - Qi0 This k value will be a conservative assumption that compensates for different land uses, soil types, areas, slopes, isohyets, and travel path lengths. In most cases of the CPS design, the bypass flow requirements will govern the design, and the screen capacity will be more than adequate to pass the Q1_1 flow. Currently, LACFCD is not installing BMP devices on deficient systems (5 year frequency capacity and less) due to uncertainty of flooding risk and maintenance liability. Hprii 1uu t 4 Design Division V. Catch Basin Flow A conservative (i.e. maximum) estimate of catch basin flows based on curb opening widths must be determined in order to calculate the Qj_j. The bypass structure must also be able to pass the maximum catch basin flow in order to provide proper flood protection. Two parameters of catch basin flow (curb flow depth and street slope) must be conservatively assumed in order to calculate the design flow into a catch basin. Based on the LACFCD Hydraulic Manua13 (Chart D-10D), the street slope does not have a large impact on side -opening catch basin flow, as shown in Table 4 and Figure 3. Street Width (ft) Street Slo a ft/ft 0.005 0.01 0.03 _CO _5 3.6 3.7 4 4.3 4.6 7- 7.3 7.8 8.4 9 10 10.1 11 11.9 12.7 14 13.7 14.9 16 17.2 21 18.7 20.7 22.6 24.3 28 23 25.5 27.8 30.1 ---------•�.•. ..... w­J -VI vai wua JLI CCL JIUPUS (depth of flow- 8", local depression=2") 35 Catch Basin Capacity with varying slopes 30 25 20 Cat 15 10 5 0 0 5 10 15 20 25 30 CB width (ft) s=0.005 s=0.01 s=0.03 s=0.05 Figure s: Loatcn oasin Vow for various street slopes Available for download at htto://www.ladpw ora/wrd/publication/Engineering/design manual,pdf April 2007 5 Design Division Street Slope Although street slope does not to have a major impact on CB flows, flows -do increase slightly as the slope increases. Curb opening catch basins are not installed on slopes larger than 0.04, so a slope of 0.04 can be assumed to be the maximum slope Local Depression The local depression will also impact the flow to the catch basin up to 25%. However, the vast majority of Public Works catch basins have a local depression of 2 inches, so 2 inches will be used in this study. Curb Flow Depth A depth of 6-inches can be assumed to be a conservative value for the depth of flow. A depth of flow of 8-inches (up to the curb height) would be very unlikely, especially on a steeply inclined street (slope >= 0.04). Analysis Parameters In summary, the criteria used for the hydraulic analysis of catch basins was: Basin type: Side Opening Catch Basin (SPPWC Standard Plan 300) Depth of flow: 6" Street slope: 0.04 ft/ft Local depression: 2" Results for the maximum flow for different catch basins of various widths are shown in the center column of Table 5. Using Equation 2, we can calculate the Q1_1 for catch basins of various widths as shown in the right column of Table 5. CB width ft Max Q,o cfs Max Q1.1 cfs 3.5 2.8 0.6 7 5.3 1.2 10 7.5 1.7 14 10.0 2.2 21 13.9 3.1 28 17.3 3.8 Fable 5: Maximum Q,_, flow April 2007 6 Design Division VI. Screen Flow Calculations To calculate the loss in hydraulic head and flow through the CPS screen, we used an orifice equation to determine the theoretic flow rate. See Figure 4. Equation 3: QIcreen = CAsareen 2gh The flow through the screen is a function of the open area (A) of the screen and the differential head between the upstream and downstream side of the screen, h. The orifice coefficient, c, is an empirically determined constant which accounts for friction and turbulence at the orifice. This coefficient is unique to each orifice geometry, and was established in our hydraulic laboratory at the San Gabriel Dam (See Section VII). Since Qi_i flows are small relative to design flows and most connector pipes have steep slopes (>O.10) and therefore supercritical flow, critical depth and critical velocity losses can be assumed to be a conservative approximation of the water depth on the downstream face of the screen. The velocity head multiplier (1.2) in Equation 4 is the loss encountered at the entrance of the connector pipe per the LACFCD hydraulic manual. z Equation 4: Downstream depth (Dd) = d, + 1.2 2 g To find the flow through the screen, Equations 3 and 4 must be solved simultaneously using an iterative process since the critical depth is a function of the flow passing through the screen. April 2007 7 Design Division VIi. Field Testing - Due to the fact that orifice conditions for the screen holes differ substantially from the conditions used to determine the standard orifice coefficients, Design Division performed field tests at the San Gabriel Dam catch basin testing facility (Figure 5) in order to determine the coefficient csoreen for Equation 3. Figure 6 and Table 6 present results of the field-testing data. April 2007 8 Design Division Screen Discharge 1.00 C( 0.10 0.01 0.10 1.00 Delta h (ft) Figure 6: Field test data Run Q cfs U/S screen -depth ft D/S screen depth(ft h ft Area ft2 Orifice coefficient, c 1 0.31 1.62 1.55 0.07 0.228 0.640 2 0.52 1.80 1.62 0.18 0.253 0.603 3 0.75 2.00 1.61 0.39 0.282 0.532 4 0.22 1.61 1.57 0.04 0.248 0.553 5 0.31 1.67 1.59 0.08 0.257 0.531 Average Cscreen 0.672 i auie u. rieia test aata Figure 6 shows that there is clearly a relationship between Q and h, which confirms that Equation 3 is applicable. The varying values for csareen in Table 6 can be attributed to debris lodged in the screen, which is difficult to measure. Even the slightest change in area can drastically impact the Cscreen coefficient. We will use the smallest, most conservative value, Cscreen =0.53, in our calculations.. April 20U7 9 Design Division Vill. Bypass Flow Calculations For the bypass flow calculation, an orifice equation can also be used. A weir equation can be used but since the maximum water depth will be above the bypass area, an orifice equation is more appropriate (See Equation 5). The maximum depth of flow can be assumed to be anywhere between the flow line or 6-inches below the flow line. Figure 7 shows this situation more clearly. Equation 5: Qbypass CbypassAbypoass V2gH As part of our retrofit program, Public Works is also intending to use automatic retractable screens (ARS) to further limit trash entering the catch basin. A minimum clearance of 4-inches is required between the top of the bypass and the flow line due to physical restrictions from the ARS See Figure 8. Figui ARS April 2007 10 Design Division IX. Results The bypass height (Hbypass) and length (L) requirements to pass the design flow were first established. With a given bypass height, a height for the screen can be calculated using the remaining depth of the catch basin while ensuring the minimum 6-inch clearance between the flow line and top of the bypass structure. The required length (as shown in Figure 9) of the bypass will be the same length for the screen. The screen capacity was calculated to ensure that the height and length of the screen will pass the Ql-i flow. The freeboard was encroached when necessary. Figure 9: Plan view of catch basin The following assumptions are made in these calculations: Screen Clogged % = 50% (conservative assumption from observation) Open area of screen = 44% (area open for a Stormwater screen, min. area open) Example Calculation For V depth = 3.5; CB Width = 3.5, Qjo = 2.8 cfs, Q1_1= 0.6 cfs, assume Hbypass = 6") Hscreen=18" Check Clearance; = V-depth — Hscreet Hbypass -curb height =3.5'— 1.5'-0.5' 8/12'= 10 inches clearance to flow line > min. 4" Size Bypass Using Equation 5, Qbypass — cbypass``1bypoass 2gH = cbypassHbypassL 2gH Hbypass = 6 inches, with cbypess=O.6, g=32.2, Hb ass 1 H = 2 + 10" - 6" freeboard 6'r _ — + 10"-61' = 7" 2 April 2007 11 Design Division Qbypass = CbYpassHbYpcs.L 2gH 2.8 = 0. 6x0. Y xL 2x32. 2x7 / 12 L = 1.52 feet Then using Equation 3, the screen area. can be checked to see if it can pass the Qj_j. Based on a L=1.53 feet and a height of 1.5 feet, the screen can pass 1.5 cfs which is greater than the 0.6 cfs it needs to pass, thus the dimensions are satisfactory. The following Table 7 provides an example of sizing recommendations for screen and bypass heights and lengths for a V-depth of 3.5 feet. To use this table, a designer would find the row corresponding to the CB width, and would then size a screen that met the minimum height and length. N. depth" ft CB Width ft Max Qjo cfs Bypass Height in Free- board in Screen Height in QI_1 cfs Clear- ance in Screen Length ft Screen Capacity cfs 3.5 3.5 2.8 6.0 6:0 18 0.6 10.00 1.5 1.5 3.5 7 5.3 6.0 1 6.0 18 1 1.2 10.00 2.9 2.9 3.5 10 7.5 6.0 5.0 18 1.7 10.00 3.8 1 3.8 3.5 14 10.0 8.0 0.0 18 2.2 8.00 3.1 3.1 3.5 21 13.9 8.0 0.0 18 3.1 8.00 4.3 4.3 3.5 28 17.3 1 12.0 1 0.0 18 3.8 4.00 3.9 3.9 Table 7: Recommended values for a V=3.5' catch basin Note that these are only recommended values. Different values may have capacity to pass the design and TMDL flows. Please see the attached appendix for CPS sizing recommendations for most common catch basin sizes. Some combinations of V-depths and connector pipe sizes made installation of a practically sized CPS impossible, thus the height of the screen had to be reduced below our recommended standards (the total area and therefore treatment capacity of the screen is still adequate even in these unusual scenarios). A size recommendation was made based on the most practical size. For example, a 15" radius screen, with a 180-degree angle will result in a length of 3.9 feet, or a 15" radius screen with a 90-degree angle will result in a length of 1.96 feet. Thus, the bypass height, screen height were. calculated with the goal to calculate a length close to 3.9 feet or 1.9 feet. Increasing the radius or installing rectangular screens to increase the lengths can accommodate any lengths larger than the recommended value. The screen does not have to be a semi -circular arc, as long as the minimum length and height requirements are satisfied, it will pass the TMDL and design flow regardless of shape. Figure 10 shows an example of a non -circular screen. April 2007 12 Design Division X. Catch Basins in Series For parallel catch basins in series (See Figure 10A), only the upstream catch basin shall have a CPS, since the low flow will only enter the upstream basin. The upstream CPS can be sized just like an individual basin. igure 10A: Same side catch basin in series RM Figure 10B: Opposite side catch haain in cariac For catch basins in series across from each other (See figure 10B), the upstream and downstream CB CPS shall be designed as individual basins. However, the downstream basin will need to bypass its design flow and the upstream design flow. The downstream basin shall be designed such that the width of the basin is the sum of the downstream and upstream basin. For example, for two seven -foot basins, the downstream basin shall be designed as a 14-foot basin. Apri12007 13 Design Division XI. Maintenance Requirements The purpose of a Connector Pipe Screen :(CPS) is to contain trash within a catch basin, excluding it from the storm drain system. Routine maintenance will be necessary to remove trash from the catch basin to prevent it from accumulating to a point that would affect the performance of the CPS or the catch basin itself. Proposed Maintenance Approach ■ Inspect and clean each catch basin between May 1 and September 30 of each year. ■ Inspect and provide additional cleaning of any catch basin that is at least 40% full of trash and/or debris. Based on field testing at the San Gabriel Dam catch basin testing facility, visual observation of City of Los Angeles Vertical screens, and recommendations from the City of Los Angeles, the following physical requirements were established. • Minimum V-depth = 3.5 • Minimum screen height = diameter of connector pipe • 6" spacing for vertical bars .for bypass • 6" minimum bypass height • 4" minimum clearance from flow line to top of bypass structure. • When low flows have the potential to fall from the curb to behind the CPS,, a deflector or screen must be installed on the top of the structure. • Where manhole access is impeded due to the internal screen, a new manhole shall be constructed. 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TO: CONSULTANT REQUESTED BY: You are hereby directed to make the herein described changes from the original scope of work of this agreement. Except as specifically modified herein, all terms and conditions of the original agreement remain in full force and effect, and apply to the additional work as if said work was originally incinded in the agreement_ Agreement Amount (Base Bid) $ Amount of This Change Order .............................................. $ Amount of Previous Change Orders ......................................... $ Total Change Orders ..................................................... $ Modified Agreement Amount $ By reason of this change order the time of completion will be a 'usted as follows: Approved: Date: Director of Community Services & Water Attest: Date: Manuela Giron, City Clerk We, the undersigned Consultant, have given careful consideration to the change proposed and hereby agree, if this proposal is approved, that we will provide all labor, equipment and materials, including overhead, exceptas may otherwise be noted above, and perform all services necessary for the work above specified, and will accept as fill payment therefore the prices shown above. Accepted Date: Consultant: By: Title: c: Project bile/Uonsultant/Purchasing Exhibit B -� 7' CITY OF VERNON COMMUNITY SERVICES & WATER DEPARTMENT CONTRACT CHANGE ORDER NO. 1 SUPPLEMENT NO. SHEET 1 OF 1 SHEETS PROJECT: City Catch Basin Full Capture Device Retrofit Contract. No. TO: G2 Construction, Inc. CONTRACTOR REQUESTED BY: Citv of Vernon You are hereby directed to make the herein described changes to the plans and specifications or do the following described work not previously included in the plans and specifications of this contract. Except as specifically modified herein, all terms and conditions of the original contract remain in full force and effect, and apply to the additional work as if said work was originally included in the contract Furnish and install five additional connector pipe screens at the bid unit price: 5 X $885.00 = $4,425.00 Total cost of change order: $4,425.00 (Resolution No. 9674) Contract Amount (Base Bid) ............................................... $ 206,205.00 Amount of This Chan e Order I ............................................. $ 4,425.00 Amount of Previous Change Orders ..........................:.............. $ 0.00 Total Change Orders $ 4,425.00 Modified Contract Amount .................................... $ 210,630.00 By reason of this change order the time of com letion will be adjusted as follows:;t� Approved: Date: % m e Dire for 'nit Services &Water Attest: Date: ��, O g Man iron, City Clerk We, the undersigned Contractor, have given careful consideration to the change proposed and hereby agree, if this proposal is approved, that we will provide all labor, equipment and materials, including overhead, except as may otherwise be noted above, and perform all services necessary for the work above specified, and will accept as full payment therefore the pricers shown above. Accepted Date: ��� r I / _ Contractor: ex:za7k _.L ✓U BY / Title: /'/(z�11"'� Rev. c: Project'riteit ontractorirurcna„us