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Tubes, as appropriate, to help determine strength and compressibility characteristics of the <br />subsurface materials, particularly in clayey soils. <br />• In accordance with the applicable permit requirements, all exploration borings will be backfilled with <br />a lean cement grout mix. Soil cuttings and drilling fluid consisting of water and bentonite from the <br />borings will spread on site at the locations of the exploration. <br />• City will provide the labor and equipment suitable for completing test pits within the. Consultant will <br />select 4 test pit locations, log the test pits to evaluate the sludge thickness and underlying material, <br />and collect bulk samples for geotechnical testing. Consultant will prepare a Site Plan showing the <br />proposed sampling locations, and Consultant will confirm the sampling schedule with City at least <br />48 hours in advance. <br />• Soil strength and characterization data will be used to construct idealized soil models for static and <br />seismic slope stability analyses using Slope/W software. In addition, the settlement of the <br />equipment pad surface will be calculated for the weight of the proposed fill. The time frame for <br />these settlements to occur will be part of the analysis. <br />• The results of the exploration, including boring logs, laboratory testing, slope stability and <br />settlement analyses, and earthwork recommendations for construction of the equipment pad will be <br />included in the final geotechnical report. Preliminary results will be available for review prior to <br />report publication. <br />Task 2 – Chemical Testing and Stabilization Study: <br />Concurrent with our geotechnical investigation, Consultant will collect samples of fill and pond sludge for <br />chemical analyses. The purpose of the testing will be to confirm the total and soluble fractions of chemicals <br />in those materials. Up to 8 composite samples of the fill soil will be collected by hand and 4 discreet <br />samples of the pond sludge will be collected from the test pit spoils generated during the geotechnical <br />investigation. The City will provide the labor and backhoe or excavator equipment to assist with sampling <br />within existing stockpile. Consultant will prepare a Site Plan showing the proposed sampling locations, and <br />will confirm the sampling schedule with the City at least 48 hours in advance. <br />All samples will be collected using standard industry practices. <br />Sludge samples will be tested for the following: <br />• Total Petroleum Hydrocarbons as gasoline (TPHg) in accordance with EPA Test Method 8015; <br />• Total Petroleum Hydrocarbons as diesel and motor oil (TPHd and TPHmo) with silica gel cleanup <br />in accordance with EPA Test Method 8015; <br />• Volatile Organic Compounds (VOCs) in accordance with EPA Test Method 8260; <br />• 17 heavy metals in accordance with EPA Test Method 6000 and 7000 series; <br />• Polychlorinated bi-phenyls (PCBs) and organochlorine pesticides in accordance with EPA Test <br />Methods 8081 and 8082; <br />• Soluble lead using the Waste Extraction Test; <br />• Soluble lead, TPH, PCBs, and pesticides using the Waste Extraction Test and de -ionized water as <br />the solute. <br />Consulting Services Agreement between [EFFECTIVE DATE] <br />City of San Leandro and —Exhibit A Page 2 of 5 <br />