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Mr. Lloyd Gums A91701.01 C September 20, 1996 Page 5 SAMPLING AND ANALYSES OF SOIL SAMPLES Soil samples were collected from hand augered borings HA-8A and HA-10A. These borings were drilled to collect samples from directly below the samples collected from HA-8 and HA-10 during the December 1995 field investigation. SJCPHS representative, Mr. Ron Rowe, was present to observe the soil borings, sampling and abandonment of the borings. While on site, Mr. Rowe gave verbal approval of the boring locations and sampling depths. A soil sample was collected from HA-8A at 6.5 feet BSG, and a soil sample was collected form HA-10A at 8.0 feet BSG. The sampling depth was attained by boring with a hand auger soil boring device to the target depth. Soil samples were collected by driving a soil sampler equipped with a stainless-steel sample retention sleeve into undisturbed soil at the bottom of the augered holes. The soil borings were abandoned by backfilling with neat cement. In soil borings HA-8A and HA-10A a distinct color change was noted in the soil at approximately 3 feet BSG. Soil above the depth of 3 feet BSG was observed to contain gravel and pieces of portland cement concrete and asphaltic concrete. Below the depth of 3 feet BSG the soil did not contain any evidence of concrete or gravel and appeared to be naturally deposited sediment. Soil boring logs for HA-8A and HA-10A are attached. The soil samples were chemically analyzed in the 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 Leaking Underground Storage Tank (LUFT) Field Manual. Benzene, toluene, ethylbenzene, xylenes (BTEX) and methyl tertiary-butyl ether (MTBE) using the United States Environmental Protection Agency (U. S. EPA) Method 8020.