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The petroleum hydrocarbon plume has been sufficiently defined at the site (see Section 5 3) <br /> However, until the residual petroleum hydrocarbons in the area north of the former UST <br /> have been remediated,we do not recommend active groundwater treatment We recommend <br /> the next quarterly sampling of the monitoring wells be scheduled for June of 1994 <br /> TABLE 2 <br /> ANALYTICAL RESULTS OF WATER SAMPLES <br /> (A91L) <br /> Sample TPH as TPH as Ethyl- <br /> ID Gasoline Diesel Benzene Toluene benzene Xylenes <br /> GT-18-MW 1 <br /> (6-3-88) 940 ND 89 1 56 NA 190 <br /> (1-9-90) 80,000 66 870 760 210 540 <br /> 01-1712 MWI <br /> �p l[ (9-17-90) 8,100 NA 130 5 00 110 730 <br /> MW-1/3-5-93 4,000 1,800 61 41 4' 29 4`-450 <br /> �k� > MW-1/9-9-93 2,300 520 21 50 °23 A150 <br /> 1 MW-1/3-25-94 K 5,100 700 93 4,-21 �<81 z 670 <br /> I GT-18-MW 2 <br /> (6-3-88) ND ND ND ND NA ND <br /> (1-9-90) ND ND ND ND ND ND <br /> 01-1712 MW2 <br /> (9-17-90) ND NA ND ND ND ND <br /> MW-2/3-5-93 ND ND ND ND ND ND <br /> MW-2/9-9-93 ND ND ND ND ND ND <br /> MW-2/3-25-94 ND ND ND ND ND ND <br /> GT-18-MW 3 <br /> (6-3-88) ND ND ND ND NA ND <br /> (1-9-90) ND ND ND ND ND ND <br /> 01 1712 MW3 <br /> (9-17-90) ND NA ND ND ND ND <br /> I MW-3/3-5-93 ND ND ND 032 ND ND <br /> MW-3/9-9-93 ND ND ND ND ND ND <br /> MW-3/3-25-94 ND ND ND ND ND ND <br /> I MW-4/9-9-93 61 ND ND ND 054 ' 0 <br /> MW-4/3-25-94 ND ND ND ND 044 ND <br /> gglL parts per Mon p <br /> ND None Detected <br /> NA Not Analyzed <br /> 5.3 Petroleum Hydrocarbon Impacted Soil <br /> IAs indicated in the previous report on the site, sail samples from the sidewalk of the <br /> excavation as well as samples from the installation of MW-4, indicate that impacted soil <br /> extends to the north and northwest of MW-1 Approximately 350 to 400 cubic yards of <br /> ts�ar.r,t.e„s< r.G <br /> QR3W l a 10 <br /> I <br />