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Mw-5 " <0 50 +MW-1 <br /> _ 1 <br /> <0 50 <br /> -- 4 In ..weTItz. \ <br /> MALES -------- ----��- ----- --------------- <br /> AREA _ VW-3 ® �� <br /> 1 \ \ � E <br /> a LEGEND <br /> MW-1 + Monitoring Well <br /> Location and Number <br /> \ i <0 50 Benzene concentration <br /> VW-4 10M <br /> I 1 I ! �- --- ------- (ug/1) <br /> (a a b) B-1 r- ----�------ -; \ 1 ? _ i VW-2 ® Vapor Extraction Well <br /> I J I i 10M ( F (Each vapor well consists <br /> VW-2 ® _ __-====3_��- -- 1 W , <br /> Ir 1 V 3 b I I i 1 1 F of two probes, a & b) <br /> l ) i IOM , � (/7 i <br /> 1 , B-1 Soil Boring Location <br /> 1 ! <br /> MW-3 1 11\ < < and Number <br /> ! / � V��N-1 � © � <br /> f PUMP \� 670 /�(a a b) 11 =\ i SW Sanitary Sewer <br /> 1 SS Storm Sewer <br /> j ISLANDS <br /> <0 50 -\ Inferred Benzene <br /> l <br /> MW�-4 Isoconcentration Contours <br /> I ! � <br /> I + 1 ' <br /> l <br /> 7 B-2 40 j 9 <br /> I Note Monitoring wells MW-1 through <br /> I MW-3 sampled by others on <br /> I MW-2 111 ? October 30, 1992. <br /> I <br /> I Monitoring wells MW-4 and MW-5 <br /> I <br /> 14 sampled by AMV on <br /> 1 December 14, 1992. <br /> EaS F�e FIGURE 4 <br /> -•-' BENZENE CONCENTRATION CONTOUR MAP <br /> (10-30-92 AND 12-14--92) 1N MICROGRAMS PER LITER <br /> Beacon Station 1494 <br /> 2185 East Fremont Street <br /> W` Stockton, California <br /> D—M_ <br /> ULTOS 02 LGP Acton • Mickelson •van Dam, Inc <br /> 55 C 20 ft Consulting Selentlsts, Engineers <br /> rn.>,. rnvamd W and GeologIsts <br /> f <br /> ULSBZC HEN 5090 R d Mathews Pkwy, <br /> Approximate Scale Gnhf.n Na K-U..a br E1 Dorad Hills, CA 95762 <br /> 1 In = 20 ft ID.lIti (916) 939-7550 <br />