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San Joaquin County Public Health Services <br /> Environmental Health Division <br /> January 14, 2000 <br /> Page 3 <br /> sealed soil sample will be labeled and immediately placed in cold storage for transport to the <br /> analytical laboratory under formal chain-of-custody. All coring and sampling equipment will be <br /> thoroughly cleaned and decontaminated between each sample collection by triple rinsing first with <br /> water, then with dilute tri-sodium phosphate solution, and finally with distilled water. Cleaning <br /> rinseate will be contained onsite in a sealed 55-gallon drum pending laboratory results. <br /> Following completion of soil sampling activities, 3/4 inch diameter Schedule 40 PVC well casing <br /> will be placed in four of the borings, and grab groundwater samples will be collected from the four <br /> selected borings using a clean small-diameter stainless steel bailer. Each grab groundwater sample <br /> will be collected as follows: (1) Laboratory-supplied containers will be completely filled directly <br /> from the bailer with a minimum of agitation; (2)After making sure that no air bubbles are present, <br /> each container will then be tightly sealed with a Teflon-lined septum; and (3) Each container will <br /> then be labeled and placed in cold storage for transport to the analytical laboratory under formal <br /> chain-of-custody. All sampling equipment will be thoroughly cleaned and decontaminated between <br /> each sample collection by triple rinsing as described above. <br /> Laboratory Analysis of Soil and Water Samples <br /> Approximately 12 soil samples and four grab groundwater samples will be analyzed for the <br /> following parameters: <br /> USEPA 8015M Total Petroleum Hydrocarbons as Diesel/Motor Oil (TPH-D/MO) <br /> In addition, four soil samples will be analyzed for the following parameters: <br /> USEPA 8015M Total Petroleum Hydrocarbons as Gasoline (TPH-G) <br /> In addition, four grab groundwater samples will be analyzed the following parameters: <br /> USEPA 8260B Volatile Organic Compounds (VOCs) <br /> All analyses will be conducted by a California-certified analytical laboratory with two-week turn <br /> around on lab results. <br /> Preparation of Summary Report <br /> A report summarizing investigative methods and results will be prepared for submittal to San <br /> Joaquin County Public Health Services. This report will describe all investigative methods and <br /> results, and will include tabulated laboratory results. <br /> GRIBI Associates <br />