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Clayton co" 4.0 i 4.1 PURPOSE AND SCOPE Borehole loca*ions were selected to better define the extent of shallow soil contamination in the vicinity of monitoring well MW-3B and the leach line fro;n former.septic tank #1 {Figure 2j. This septic tank was removed b Clayton 17, 1990. Y Y on August E r The borehole soil samples were analyzed for suspected chemical constituents by Environmental Protection Agency g cY (EPA) Method 5520 E and F for ail and grease. In addition, the soil sample from the 4-foot interval in monitoring well MW-3B was reanalyzed for total petroleum hydrocarbons (TPH) as diesel, total oil and grease and, hydrocarbons. This task was conducted to better quantify the potential leachability of she hydrocarbon constitutes, at the request of Ms. Hinson. Clayton conducted a quarterly water sampling on May 2, 1991. This task was conducted to assess groundwater for possible contamination from the hydrocarbons. detected in the surrounding soils. f The groundwater samples were analyzed by the i;allowing methods: • EPA Method 5030/8015-$020 for gasoline fuel and the volatile hydrocarbons, benzene, toluene, ethylbenzene, and xylenes EPA Method 3510/8015 for totalp etr oleum hydrocarbons as diesel fuel EPA Method 41$.1 for total recoverable petroleum hydrocarbons t Standard.Method 5520 B and F for total petroleum hydrocarbons All samples were transported to Clayton's laboratory under:chain-of-cu forms are included in Appendix E with the analytical results. stOdY' These 4.2 SOIL SAMPLE ANALYSES Total recoverable hydrocarbons were not detected in soil samples collected from the - boreholes (BH-1, BH-2, BH-3, BH-4, and BH-5). Reanalysis of the soil sample from the 4-foot interval in MW-3B revealed 3 parts per million (ppm) diesel, 2.80m p t - hydrocarbons and 560 ppm total oil and grease. The laboratory analyses report is - - included as Appendix E: E - 1 i