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1 2.4 Monitoring Well Installation <br /> . <br /> on June 1, 1992, a groundwater monitoring well <br /> M�ct d from thlled e wella <br /> ndanalyzed ately nortfohr <br /> of the former tank excavation. A water sample was co <br /> fatal petroleum hydrocarbons('TPH as gasoline and <br /> ' ester sample le and the nd volatile aPHS/EHD reqromatics uired Petroleum hydrocarbons were detected in the p <br /> further groundwater assessment. <br /> leum <br /> Soil samples collected from MW-1 indicated that <br /> all volume of Toluene was detected in ea h sample; <br /> rocarbons <br /> remained in the soil at depths of 35, 40 and 45 feet <br /> xylenes were detected in sample B1-35. Analytical results of the soil samples are included <br /> tin Table 3. <br /> Two additional monitoring wells were installed by GeoAudit on November 12, 1992. One <br /> well (MW-3) was installed south of the warehouse, near the southern boundary of the <br /> property(near the Manna Pro facility).The other monitoring well (MW-2)was installed east <br /> of the former tank excavation. Installation, sampling procedures, and results were described <br /> ' in a report prepared by GeoAudit ("Groundwater <br /> ing Wdetected in soilell ation samplResf rom <br /> dated January 8, 1993). No petroleum hydrocarbons were d <br /> ' MW-2 or MW-3. <br /> On June 17, 1993, two additional monitoring wells were installed on the Cutter Lumber <br /> property to the north of monitoring well MW-1. MW-4 was installed near the southeast <br /> corner of the Cutter Lumber office, north-northeast of monitoring well MW-1; MW-5 was <br /> installed at the west edge of the property, northwest of monitoring well MW-1. Installation, <br /> described in <br /> he <br /> sampling procedures, and results were t tGehydrocarbons were Well <br /> and Sampling Report dated June 1993. No petroleum <br /> detected in soil samples from MW-4 or MW-5. <br /> 1 <br /> 2.5 Groundwater Monitoring <br /> Groundwater monitoring at this site began in June 1992, following installation of MW-1.The <br /> monitoring program was performed on a semi-annual basis through June 1993. Since then, <br /> monitoring has been conducted quarterly. The most recent monitoring is the sixth time that <br /> groundwater data have been collected at the site. <br /> The depth to groundwater is measured in all wells and samples are collected from MW-1, <br /> MW-4, and MW-5 during each event. Wells MW-2 and MW-3 are sampled only annually <br /> (in June), because no petroleum hydrocarbons were detected in these wells when they were <br /> ,installed in November 1992; they are believed to be beyond the limits of groundwater <br /> ' contamination. <br /> moo.,ti&�. �.�. 4 <br /> Web.Uh QR46-9Y,1.10 <br />