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APPENDIX A <br /> FIELD PROCEDURES 1 <br /> ' Page 2 <br /> presence of i/4-inch to 1/2-inch floating hydrocarbons Water from the bailers were decanted into <br /> appropriate sample containers provided by the laboratory The samples were immediately placed in <br />' an ice-chest with "crushed ice," along with a travel blank, and submitted under chain-of-custody to a <br /> California-certified laboratory for analysis of TPH as gasoline using EPA method 8015/Purge and <br /> Trap, and Benzene, Toluene, Ethylbenzene and Total Xylenes (BTEX) using EPA method 602/Purge <br /> and Trap <br /> 1 Pumping and sampling equipment was cleaned prior to development/purging of each well with a <br /> solution of trisodium phosphate and distilled water to minimize the potential for cross contamination <br /> All water removed during development and purging operations was stored in sealed, labeled 55- <br /> gallon drums <br />' Subsequent to installation and completion, the well locations and elevations were surveyed by a <br /> California licensed surveyor to aid in the determination of the hydraulic gradient and flow direction <br /> 1 <br /> I , 'N v / <br />' WALLAc=-RV IL <br /> R nd d paps, i=ASSOCIATEs imc <br />