Agmt 2015 Carollo Engineers Inc - Laserfiche WebLink

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EXHIBIT A INTRODUCTION The City plans to fill the eastern third of the former polishing pond to create a 1-acre equipment storage area at its Water Pollution Control Plant. Fill will comprise approximately 16,000 cubic yards of soil currently stockpiled at the WPCP drying bed area (spoils from the construction of the WPCP rehabilitation project). Recently geotechnical and soil stabilization studies were conducted on the spoils and sludge in the former polishing pond and results were discussed with the Regional Water Quality Control Board (RWQCB). RWQCB suggested collecting water quality data in the vicinity of the former polishing pond. An initial water quality assessment was completed in March 2015 and a Plan of Action dated March 31, 2015 outlining the next steps needed to determine the water quality in the area of the former polishing pond was submitted to the RWQCB, The purpose of the Agreement is to implement the Plan of Action approved by the RWQCB. SCOPE OF SERVICES Consultant will conduct the following activities to implement the Plan of Action. Task 1 — Research local water quality data to identify data results which can be used to assess ambient water quality in the area of the sludge ponds: Contact the Port of Oakland and Regional Water Quality Control Board staff to obtain the most recent data . for the surface water sampling point referred to as SW-2 located at the Galbraith Golf Course, and conduct research of local data within the San Francisco Estuary Institute (SFEI) CD3 website database. Ambient data will be summarized and used for comparison purposes along-side the new water quality data to be collected during this work. Consultant will also research current water quality goals for comparison purposes. Task 2—Water depth readings and purging wells MW-1 and MW-4: Initially the well caps will be opened and Consultant will measure the depth to water below the existing top of well casings. At this same time the depth of water in the sludge pond near the depth gauge will be measured. The wells will then be purged up to 3 well casing volumes of water from the wells using new disposable bailers. Purged water will be added to the onsite waste storage drum located near well MW-4. During well purging, water quality parameters will be measured and recorded. Once water levels recharge to within 80 percent of their initial volume, Consultant will collect samples from the wells using new disposable bailers. Consultant will also collect former polishing pond water samples. The water samples will be retained in laboratory pre-cleaned containers which will be uniquely labeled and placed on ice, pending delivery to the laboratory. Task 3— Laboratory testing, data tabulation and evaluation: The testing program for the well and pond samples will include the following. The samples will be tested on a normal turn around basis (7 working days)for the following analytical suite: • Metals by EPA Methods 200.7/8 and 6010 with and without filtering. • TPH diesel and motor oil range by EPA 8015. • TPH gasoline range by EPA 8260. • Volatile Organic Compounds by EPA 8260, low detection limits. Amendment No. 1 to Consulting Services Agreement between City of San Leandro and Carollo Engineers, Inc. Page 3 of 4