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3.6 Laboratory Analytical Results The soil and groundwater samples collected during this investigation were preserved on ice and submitted to Sparger Technology, Inc. following standard sample-preservation and Chain-of-Custory procedures. A summary of the analytical results is presented in Table 1 and 2. The laboratory analytical reports are presented in Appendix B. The Total Recoverable Hydrocarbon analysis (EPA 418.1) of the four soil samples revealed detectable concentrations of petroleum hydrocarbons in the range of 47 parts per million (ppm) to 110 ppm (Table 1). The four groundwater samples exhibited non- detectable levels by EPA 418.1 (Table 2). The laboratory analyses of Total Petroleum Hydrocarbons for gasoline constituents (TPH-G) and Benzene, Toluene, Ethylbenzene and Xylene compounds (BTEX) revealed non-detectable levels in all eight soil and groundwater samples tested. One soil sample (B-4) analyzed for Total Petroleum Hydrocarbons in the diesel range (TPH-D) exhibited a non-detectable result (Table 1). The B-4 soil sample was analyzed for TPH-D to determine the specific hydrocarbon constituent detected by the EPA 418.1 analysis. Chain-of-Custody forms and laboratory results are presented in Appendix C. 8