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C A M 8 R I A <br /> CONCLUSIONS <br /> CPT-1 was drilled between the dispensers and the USTs to assess the vertical extent of gasoline <br /> constituents in soil and groundwater No TPHg or benzene were detected in soil from this <br /> boring MTBE was detected in soil at depths from 30 to 50 fbg at concentrations ranging from <br /> 0 9 to 3 7 ppm This boring delineates the vertical impact of MTBE above 60 fbg in soil beneath <br /> the site <br /> Soil results from well borings MW-2 through MW-4 delineate TPHg, BTEX, and MTBE <br /> laterally in soil northwest of the USTs and to the south and southeast of the site <br /> TPHg and 1,2-DCA were detected in the shallow (71-74 fbg) groundwater sample from boring <br /> CPT-1, and not in deeper samples, delineating their impact to groundwater above 83 fbg <br /> Benzene was not detected in any groundwater samples from CPT-1 MTBE was detected in all <br /> the groundwater samples collected from CPT-1, indicating that it impacts groundwater to at least <br /> 92 fbg <br /> No wells were identified within 500 feet of the subject site, and Cambria concludes that the <br /> 110 subject site does not pose a threat to the receptors identified within 2000 feet of the site <br /> RECOMMENDATIONS <br /> Cambria recommends gauging and sampling wells MW-1 through MW-4 quarterly to determine <br /> if there are seasonal fluctuations in the observed groundwater elevations and chemical <br /> concentrations and to establish a predominant groundwater flow direction over time We <br /> recommend that the groundwater samples from all wells be analyzed for TPHg, BTEX, MTBE, <br /> and 1,2-DCA <br /> is <br /> 1359 8 <br />