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Project No. 9688 WORK PLAN `"' June 11, 1999 2373 Mariposa Road Page 8 As samples are obtained, they will be covered with aluminum foil or teflon tape, capped and sealed with tape. The samples will then be labeled, placed in a cooled ice chest for storage until transported to the analytical laboratory. A Chain-of-Custody form will be initiated by WDE personnel at the time of sampling and will accompany the samples to a state certified laboratory using California Department of Health Services approved methods. Groundwater Sample Collection Following all soil sampling the boring will be extended about 5 to 10 feet below the first encountered groundwater. New slotted PVC well screen and blank riser casing will be placed in the hole. Initially the depth to water from the top of the boring will be measured to an accuracy of 0.01 feet. The water will then be checked for floating product or iridescent sheen by taking a preliminary water sample with a new disposable bailer. If floating product is observed, the thickness and nature of the product will be noted. Then about 10 liters of water will be removed as a development procedure. The disposable PVC bailer will be used for the development. Development water will be stored on site in 55 gallon DOT 17E drums until analysis of the water is obtained and the proper method of transport and disposal can be determined. The grab water sample will be collected with a disposable PVC bailer. Samples will be handled and transported as if a representative groundwater sample. The water sample will be poured directly into laboratory cleaned 40 milliliter volatile organic analysis (VOA) vials to prevent loss of any volatile constituents. The vials will be filled slowly and in such a manner that the meniscus extends above the top of the VOA vial. After the vials are filled and capped, they will be inverted to insure there are no headspaces or entrapped air bubbles. After sealing with a laboratory provided teflon cap, the VOA vials will then be labeled and placed in a cooled ice chest for transportation to the analytical laboratory. Water samples which will be analyzed for extractable compounds will be decanted into laboratory cleaned one liter bottles and will be handled the same as the VOA vials. A Chain of Custody form will be initiated by WDE personnel at the time of sampling and will accompany the water samples to a state certified laboratory using Department of Health Services approved methods. Soil and Groundwater Sample Analyses All soil and groundwater samples obtained during the work described in this Work Plan will be analyzed for the following: WILLIAM DUBOVSKY ENVIRONMENTAL