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Cherokee Service Center A91701.01 July 10, 1996 Page 2 PROPOSED WORK SCOPE Task 1 - Additional Sampling - Eastern Dispenser Island An additional soil sample will be collected at the approximate location of soil boring HA-10 drilled during our investigation in December, 1995. The SJCPHS will be notified of the date and time that the sample will be collected. The sample will be collected at deeper than approximately 6 feet below site grade (BSG), or at a reasonable and appropriate depth specified by the SJCPHS-ESD representative. Soil sampling, decontamination of equipment, handling of soil cuttings, sample handling, and field screening with a photoionization detector (PID) will be performed in accordance with our "Standard Operating Procedures" contained in Appendix "A" of the Amended Work Plan. The sampling depth will be attained by boring with a hand auger soil boring device until native soils are encountered (below any fill material). The soil sample will be collected from the native soils by driving a soil sampler, equipped with stainless-steel or brass sample retention sleeve, into undisturbed soil at the bottom of the augered hole. The soil sample and cuttings will be screened in the field with a PID. The soil boring will be abandoned by backfilling with a neat cement slurry. The slurry will be poured into the boring slowly to preclude the potential for bridging and formation of voids. Task 2 - Analytical Testing of Soil Sample The soil sample will be chemically analyzed in the Twining's analytical laboratory for the following analytes: Total petroleum hydrocarbons -gasoline range constituents (TPH-G) and total petroleum hydrocarbons - diesel range constituents (TPH-D) using the gas chromatography/flame ionization (GC/FID) method as recommended in the California State Water Resources Control Board's L=Idng Underground Storage Tank MFT) Field Manual. Benzene, toluene, ethylbenzene, and xylenes(BTEX)and methyl tert-butyl ether(MTBE) using the United States Environmental Protection Agency (U. S. EPA) Method 8020.