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r7m <br /> Y - 3- s -,.-. a• : :s`.fl. *�»>nV` s,�4,',a'�•; - `w.W.wwer +�.wedYs§ 1." a:g <br /> x <br /> Lammersville School District <br /> July 16, 1990 202/899-7004 <br /> 6 <br /> TABLE 2 <br /> LABORATORY ANALYSIS OF GROUNDWATER <br /> UNDW <br /> ATER <br /> (in ppb) <br /> November 12, 1987 <br /> WELL <br /> ID benzene Toluene Eth (benzene <br /> --X—�. X Iv eves TPH-G <br /> MW-1 69 1 21 — <br /> 2 510 <br /> w.. MW-2 ND 56 130 <br /> 230 4300 <br /> MW-3 ND ND ND <br /> ND NO <br /> MW-4 ND ND ND <br /> ND ND <br /> MW-5 ND ND ND <br /> ND ND <br /> �. The estimated northeastward groundwater flow direction in November 1987 was similar to that in <br /> June 1987. TPH-G concentrations decreaszd in the five-month period from 6,958 ppb to 4,300 ppb in <br /> MW-2, and no detectable hydrocarbons were found in the analyzed water samples collected from MW-3, <br /> ^' MW-4, and MW-5. <br /> In September/October 1988, Groundwater Technology conducted additional groundwater <br /> monitoring and sampling of the live monitoring wells. During this period,the wells were sampled for total <br /> petroleum hydrocarbons as diesel (fP14-r)) as well as TPN-G and STEX. Results of the analyses are <br /> presented in Table 3. Copies of all three sets of analytical data are presented in A <br /> ►y ppendix L <br /> i . <br /> k <br /> GROU,NIA1'ATER <br /> TECH-NOLOGY.1\C, <br />