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hydrocarbons as gasoline (TPHG) by United States Environmental Protection Agency (USEPA) <br /> method 8015 and for benzene, toluene, ethylbenzene, and total xylenes (BTEX) and methyl tert- <br /> butyl ether (MTBE) by USEPA method 8020. MTBE was confirmed using USEPA method <br /> 8260. <br /> TPHG was detected in 3 of the 7 sampled monitoring wells at concentrations ranging from 56 <br /> gg/l (MW-3) to 32,000 µg/l (MW-4). Benzene was detected in 2 of the 7 sampled monitoring <br /> wells at concentrations of 53 µg/l (MW-8) and 92 µg/l (MW-4). MTBE was detected by method <br /> 8260 in 2 wells at concentrations of 8 µg/l (MW-3) and 110 µg/l (MW-8). Analytical data are <br /> summarized in the table and illustrated on Figure 3. Certified Analytical Reports and chain of <br /> custody documentation are presented in Appendix B. <br /> 5 CONCLUSIONS <br /> Groundwater samples from 3 of the 7 sampled monitoring wells (MW-3, MW-4, and MW-8) <br /> contained detectable concentrations of petroleum hydrocarbons. Groundwater flowed toward the <br /> south-southeast during the fourth quarter 1998. <br /> The material and data in this report were prepared under the supervision and direction of the <br /> undersigned. <br /> Pinnacle Environmental Solutions Pinnacle Environmental Solutions <br /> GE <br /> FL <br /> Go Ko a Harold Duke,R.G. 6763 DUB JFL <br /> Project Manager Project Geologist <br /> IV0.8783 <br /> O� <br /> SACIH:IWINWORD1USA\USA65QR.DOC-98�bduke:4 P4mae& <br /> 2 Rev.0, 1128199 <br />