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Classification System (See Appendix B) . The boring logs may be found in Appendix C. Sampling commenced at the interface between the fill material and the native subsoil. Samples for laboratory analysis were taken with a California Modified Split-spoon sampler equipped with brass tubes. Some samples were taken without brass tubes for purposes of logging relatively undisturbed soils. The samples were observed for texture, moisture, and staining or odor. Samples were taken to characterize the level of contamination observed in the field. In addition, a bottom- of-the-hole sample was collected in every boring to verify i - any field observed absence or presence of contamination. - After the last sample from each boring was collected and - observed for signs of contamination, two to three samples were selected f•3r analysis. Sample selection was based on odor and visual observation with the objective of defining the vertical extent of the contamination in each boring. A photoionization detector (PID) was also employed initially to help detect petroleum hydrocarbon vapors in the soil samples. ` However, due to the low volatility of the contaminants, the PID tended to pull in more ambient air than volatilized - contaminants which resulted in very low readings even when field personnel noted strong petroleum odors. Therefore, the use of the PID was discontinued after the third boring. The ends of brass tubes containing soil t�amples for laboratory analysis were covered with Teflon film and plastic caps to provide an air tight seal. Each sample tube was appropriately marked on site with the boring number, sample designation, date, •time, and depth. Samples were placed on ice in a cooler and transported to a Anlab Analytical -� Laboratories for analysis. Anlab is a State--of-California certified laboratory located in Sacramento. .� 8 I IN MEMO NO