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CIayton � 40 LAflTS?RY . r"sTs 41 PURPOSE AND SCOPE Borehole locations were selected to better define the extent of shallow soil contaminatior in the vicinity at monitoring well MW-313 and the leach line from former septic tank #1 (Figure 2) This septic tank was removed by Clayton on August 17, 1990 The borehole soil samples were analyzed for suspected chemical constituents by Environmental Protection Agency (EPA) Method 5520 E and F for oil and grease In addition, the soil srmple 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 the 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 The groundwater samples were analyzed by the following methods. EPA Method 503018015-8020 for gasoline fuel and the volatile hydrocarbons, benzene, toluene, ethylbenzene, and xylenes 1' • EPA Method 3510/8015 for total petroleum hydrocarbons as diesel fuel • EPA Method 418.1 for total recoverable petroleum hydrocarbons ° o Standard Method 5520 B and F for total petroleum hydrocarbons All samples were transported to Clayton's laboratory under chain-of-custody These forms are included in Appendix E with the analytical results f } 4.2 SOIL SAMPLE ANALYSES r 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-313 revealed 3 parts per mullion (ppm) diesel, 280 ppm hydrocarbons and 660 ppm total oil and grease The laboratory analyses report is included as Appendix E. -3- J