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EXHIBIT A <br />INTRODUCTION <br />The City plans to fill the western third of the former polishing pond to create a 1 -acre equipment pad for the <br />day to day operation and maintenance activities of the Water Pollution Control Plant (WPCP). Fill will <br />comprise approximately 16,000 cubic yards of soil currently stockpiled at the WPCP drying bed area (spoils <br />from the construction of the WPCP rehabilitation project). Chemical testing results indicate that the fill <br />contains elevated concentration of lead, hydrocarbons, polychlorinated biphenyls (PCBs), and chlorinated <br />pesticides. It is noted that no total lead concentrations exceeded 1,000 mg/kg, one of the criteria used to <br />classify a material as hazardous. The City has conducted preliminary discussion with the Regional Water <br />Quality Control Board (RWQCB) and received concurrence with the approach. However, the RWQCB <br />requested a "50 percent design document" for their review prior to giving their final concurrence with the <br />project. <br />SCOPE OF SERVICES <br />Scope of services for this design consists of the following tasks <br />Task 1– Geotechnical Investigation: <br />Task 1.1 - Review the existing reports on the ponds and spoils <br />Consultant will review the following reports provided by the City: <br />• Evaluation of Effluent Pond Sludge Sampling Results, City of San Leandro Wastewater Treatment <br />Plant report dated November 1995 by EOA Inc. <br />• Evaluation of Pond Closure Options, City of San Leandro Wastewater Treatment Plant report dated <br />January 1997 by EOA Inc. <br />• Conceptual Design for Closure of Effuent Pond, City of San Leandro Wastewater Treatment Plant <br />report dated November 1997 by EOA Inc. <br />• Geotechnical and Hydrogeological Investigations, San Leandro Water Pollution Control Plant <br />report dated July 30, 1999 by SCI Inc. <br />Task 1.2 - Conduct a geotechnical investigation to evaluate subsurface conditions of the berms and pond <br />bottom as well as the proposed fill material. <br />Based on the review of the above documents as well as in-house files and boring logs for the Site, <br />Consultant will complete a geotechnical evaluation of fill and the proposed fill area. The investigation will <br />include: <br />A total of 3 exploratory borings to maximum depths of 50 feet. The berm surrounding the pond will <br />be accessible to conventional truck -mounted drilling equipment. The borings will be advanced <br />using a mud rotary drill rig. <br />• Subsurface exploration will be conducted under the direction of a field engineer of Consultant who <br />will supervise, log, and collect samples from the borings. Standard penetration resistance will be <br />determined in the borings at appropriate increments. Relatively undisturbed samples may also be <br />recovered from various depths in the borings using the Modified California Sampler and or Shelby <br />Consulting Services Agreement between [EFFECTIVE DATE] <br />City of San Leandro and —Exhibit A Page 1 of 5 <br />