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CIE <br /> Lammersville School District <br /> July 16, 1990 2021899-7004 <br /> 5 <br /> 1987 included installation of five mcnitoring wells, groundwater monitoring, and collection of soil and <br /> groundwater samples which were analyzed for benzene,toluene,ethylbenzene,and xylenes(STE\), and <br /> total petroleum hydrocarbons-as-gasoline (TPH-G). No petroleum hydrocarbons were detected in the <br /> analyzed soil samples, but dissolved petroleum hydrocarbons were found in groundwater samples <br /> collected from all five monitoring wells,with TPH-G concentrations ranging from 32.5 parts per billion(ppb) <br /> in MW-4 to 6,958 ppb in, II(Table 1). The wellhead elevations were surveyed to an arbitrary datum <br /> of 100 feet. Monitoring data collected in June 1987 indicated a northeastward groundwater flow direction, <br /> ~ TABLE 1 <br /> LABORATORY ANALYSIS OF GROUNDWATER <br /> (in ppb) <br /> M- June 22, 1987 <br /> Well <br /> 1D Benzene Toluene Eth !benzene Xylenes-- '�-- _..Y_ LPH-G <br /> MW-1 664.0 493.8 296.8 1132.0 <br /> 4923.0 <br /> MW-2 67.8 407.1 535.1 2693.0 <br /> 6958.0 <br /> MW-3 4.5 4.8 2.5 20.7 <br /> 200.9 <br /> MW-4 1.3 4.8 G 0.5 5.1 <br /> 32.5 <br /> MW-5 4.9 5 3. 2.7 4.2 <br /> _.. 33.3 <br /> Another round of groundwater monitoring and sampling was conducted on November 12, 1987. <br /> The water samples were analyzed for BTEX and TPH-G. Results of the analyses are summarized in Table <br /> 2 <br /> GR0UXDj%ATER <br /> TECHNOLOGY.INC. <br />