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160 L Mr. Lloyd Gums A91701.01B January 15, 19% Page 8 5.0 RESULTS AND FINDINGS LResults of the field investigation and laboratory testing are summarized in the following subsections. 5.1 Soil PrDfUe: The soil profile beneath the site consists of interbedded strata of sand with silt, silty sand, sandy clay, well graded sand, sand with gravel, and poorly graded sand to a depth of 36.5 feet BSG, the greatest depth explored. Descriptions of the conditions encountered in the soil borings are presented in the logs of soil borings (Appendix Q. L The foregoing is a general summary of the subsurface conditions encountered in the soil borings drilled for this investigation. Stratification lines on the soil boring logs represent approximate boundaries between soil types. Actual transitions between soil types may be gradual, and the interpretation of various soil types from soil cuttings is subjective. 4 5.2 Results of P1eld Screening It has been Twining's experience while field screening soil samples with a PID that readings registering volatile organic compound concentrations of less than 100 parts per million (ppm) are not usually indicative of laboratory detectable quantities of PPCs in the soil. The readings of soil samples collected from the soil borings L B-1, B-2, B-3, B-4, B-5, B-6, B-7, B-9, HA-7, HA-8 and HA-10 drilled for this work did not register PID readings greater than 100 ppm. The soil sample collected at approximately 15 feet BSG from soil boring B-8 registered a PID reading of 113.5 ppm while the remaining samples collected from this soil boring did not register PID readings above 100 ppm. 53 Soil Sample Analytical Results: A summary of soil sample analytical results for soil samples collected in the soil borings drilled during this investigation are presented in Table L� 3. Laboratory analysis reports and chain-of-custody documentation are presented in Appendix D. L L L