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¢7 y4 <br /> Knowles Gas Staticn <br /> r 202/799-5027.02 <br /> July 21, 1988 <br /> also noted in all samples except at depths ofEFlip �an&3 4'SL1e-itfF1 <br /> again in SB-1. A background value for total lead of 4.9 ppm (SB- <br /> 11) is comparable to all samples analyzed except for the value of <br /> k 29 ppm noted in SB-8. All soil samples analyzed for EDB revealed <br /> concentrations below its method detection limit. <br /> ANALYTICAL RESULTS FOR GROUNDWATER <br /> Groundwater samples collected on October 1, 1987 were <br /> analyzed for TPH as gasoline and STEX concentrations. Laboratory <br /> f <br /> analyses revealed benzene concentrations of 69, 36 and 85 ppb in <br /> MW-1, MW-2 and MW-3, respectively (see Table 3, Groundwater <br /> Sampling Analysis Summary) . Concentrations of TPH as gasoline <br /> were also noted in all ,three wells, r <br /> TABLE 3 <br /> t"f GROUNDWATER SAMPLE ANALYSES SUMMARY , <br /> TPH AS TOTAL <br /> WELL. BENZENE TOLUENE ETHYLBENZENE XYLENE GASOLINE LEAD <br /> ' ID PPB (PPB) <br /> (PPB) _ (PPB) )(PPB (PPM) EDB <br /> w + <br /> 10/1/87 <br /> MW-1 69 ' 8.7 1 3, 100 : 469 -- --_ <br /> bi MW-2 35 1.1 <0.5 <br /> 9.0 : 376. E -- -- <br /> MW-3 85 20 0.8 16 ::r 351.8 <br /> 2 <br /> 2/88 <br /> F'•;- ; � MW-1 �.3 fi 1 .. .. 35 ' 250 :. <br /> wr' � MW-2 2 <0.5 <0.5 <0.5 720 -- -- <br /> MW.-3 fi .,_..... <0.5....... .... .....<0.5... <0...8. 190 -- <br /> ...... ... -- <br /> �§ I <br /> 61241.88 <br /> (b• ' MW-1 1.'. <0.5 <0.5 <0.5 110 <0.010 0.02 <br /> MW-2 <0.5 : 1..0 <0.5 <0.5 590 <0.010 0.02 <br /> MW-3 . 680 . 9.0 <0.5 4..0 4800. <0.010 0.02 <br /> r g ' <br /> 4A <br /> Method Detection <br /> Limit 0.5 0.5 0.5 0.5 1.0 <0.010 0.02 <br /> ` 14 <br /> s <br /> s _3 <br /> - <br />