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M WON Job: J. MELL - TRACY March 15, 1990 SAMPLING PROTOCOL SOIL:; SAMPLING 1. All soils samples recovered fcr chemical analysis will be sampled, handled, and stored in accordance with Environmental Protection Agency and Regional Water Quality Control Board guidelines for the investigation of suspected underground storage tank leaks. 2. Prior to working at the site, the brass sample liners will be steam-cleaned or cleaned in soapy (TSP) water, rinsed withc lean tap water and finally rinsed with de-ionized water, and air- dried. Prior to using the backhoe for collecting the materials for sampling and chemical analysis, the backhoe bucket will be washed with TSP and rinsed with clean tan water. 3. The brass sample liner will be sufficiently driven into the soil materials to eliminate all head space in the liner. head space is observed in the liner, If no the samle liner will be properly sealed, labeled and identified pin its original liner. The ends of all the sample liners will be capped with aluminum foil, and sealed an place by clean plastic caps and aluminized duct tape. Included on the label will be the time and date sampled, and the project name. 4. All samples retained for chemical analysis. will be stored on ice in a clean, covered cooler-box for transport to the laboratory. Additional ice will Sap added as necessary, Duplicate samples (if any) will be refrigerated. 5. Samples will be delivered to the laboratory within three days of acquisition. &. Unless otherwise requested by the laboratory, no preservatives will be added to the samples. 7. The sealed samples will only be opened by laboratory per who will perform the chemical analysis. The soil samples will anal collection date. ysed within 14-days fromtheir - -- -- - SAMPLE RECORDS AND CHAIN OF CUSTODY 1. . . Sample records for each sample will contain information on- sample type and source; .job name; sampling date; location; THE ENVIRONMENTAL _ CONSTRUCTION CO. 1�