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�gw1 4el 17 <br /> } <br /> Larweraville School Dist-rict <br /> 202/799-8221 <br /> July 28. 1987 <br /> TABLE 2 <br /> LABORATORY ANALYSIS FOR GROUNDWATER <br /> {in ppb} <br /> June 22, 1987 <br /> Well <br /> to Flcnr.ene Tohuene Ethylbenzene, X ler, fal;tl Volatile <br /> n_., If yd r0 carbons <br /> MW1 664 .0 493.8 296 . 8 <br /> 1132. 0 4923.0 <br /> MW2 67 . 8 407. 1 535. 1 2693. 0 <br /> 6958.0 <br /> MW3 q <br /> 4 .8 2. 5 20. 7 200.9 <br /> MW4 1 . 3 4 .8 C 0.5e <br /> 5. 1 32.5 <br /> MW5 4 . 9 3 .5 <br /> 2 . 7 4 . 2 33. 3 <br /> a DISCUSSION AND RECOMMENDATIONS <br /> The findings of this Investigation indicate that the <br /> subsurface groundwater beneath the Lammersville School site has <br /> been Impacted by hydrocarbons. The higher dissolved hydrocarbon <br /> concentrations In wells 1 and 2 and the presence of petroleum <br /> odors by field 'Inspection and analysis suggest that leakage has <br /> occurred in the vicinity of the pump island and/or tank pit . The <br /> limited Iateral extent , as exhibited by : ower dissolved <br /> hydrocarbon c;opcl'fltl•=at ions in the surruundiul: monitoring wells . <br /> sugl:ests the m;.Jor portio:r of the glom+t is conEaincd vas site. <br /> The d l "so l vert cooc:out rat ions o f benzene in the five wells Is <br /> above [hr, drinkingwater, actino level of. 0. 7 ppb established by <br /> the L a l i fit 1'al i ra I1 e p a t [ m rr n t ra f ff era 7 t h S e r v.l_c_es —S-1-n a e ---a-1-1-- <br /> ----- <br /> grouudWater in the city of Trar:y is considered sultable for <br /> drinking. adri i t iooa [ ,:sscssmen[ tanrl remr:di:atlOil wilt likely be <br /> 15 <br />