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')low �4 Strata may grade laterally and vertically in the region and is typical San Joaquin Valley sediment depositional environments. The site borehole data indicate that the uppermost shallow aquifer and underlying aquitard have lateral continuity in the area investigated. Physical Analysis One soil sample from Boring B-1 at 13.5-15.5 feet was sent to Earthtec Ltd. for physical analysis. The laboratory report is attached and the results are presented below in Table 1. Table 1. Physical Analysis SAMPLE ORGANIC SPECIFIC MOISTURE DRY UNIT HYDRAULIC POROSITY BULK CARBON GRAVITY CONTENT WEIGHT CONDUCTIVITY DENSITY % Pcf Cm/sec % Pef B-1@13.5- 0.11 2.766 30.80 116.9 1.56x10-5 48 117.9 15 Pcf—pounds per cubic foot. Cm/sec.—Centimeters per second. The test results indicate that the sample is a silty and clayey soil with a relatively low hydraulic conductivity. The sample was collected from the upper portions of the aquifer and the aquifer sand content increases in depth over the site. The hydraulic conductivity is probably somewhat higher in the lower sandier aquifer strata. Borehole logging shows that the aquifer strata are predominantly composed of sandy clay and clayey sand strata. Some sand strata appear to laterally grade with these strata within the aquifer. The organic carbon content is very low when compared to "typical" near surface soil. Organic carbon decays through oxidation and depth of burial in geologic deposits. In our opinion, given the depth of these sediments, the organic carbon content is considered very low to negligible. The porosity and density data for the sample are considered in the range of clayey sand and sandy clay soil. Chemical Analysis Eight soil samples four groundwater samples were analyzed at Kiff Analytical LLC, a certified analytical laboratory. Samples were be tested for the following; Total Petroleum hydrocarbons as Gasoline (TPHG), Benzene (B), Toluene (T), Ethylbenzene (E), Xylene (X), and Volatile Organic Compounds (VOC), Methyl-tert-butyl-ether (MTBE), and fuel oxygenates tert-Amyl- Methyl-Ether, Ethyl-tert-Butyl-Ether, Di-Isopropyl Ether and tert-Butyl Alcohol (TAME, ETBE, DIPE, TBA) and 1,2-Dichloroethane and Ethylene Dibromide using EPA Methods 3550, 3510/8015, 5030, 8020 and 8260. The analytical reports are attached and the data is presented in Tables 2 and 3 below.