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1 - - <br /> 11 December 2041 <br /> AGE-NC Project No 95-0184 <br />' Page 4 of 5 <br />' northwestern edge of the site to 0 005 ft/ft in the southern portion of the property The ground <br /> water flow direction vanes from northwest near the northwest corner of the site to southeast <br /> along the south side of a ground water finger in the northern portion of the site, the flow <br />' direction over much of the site is generally northeast <br /> • Detectable concentrations of TPH-g were found in all of the ground water wells sampled <br />' Except for MW-7, BTEX compounds were found in all ground water samples, except for <br /> MW-1, these samples contained one or more analytes at concentrations above California's <br /> Maximum Contaminant Levels (MCLs) <br />' • No free product was measured during this sampling event,however,most of the well screens <br /> are drowned and are not likely to produce direct evidence of free product <br /> • The oxygenated volatile organic compound MTBE was detected in concentrations ranging <br /> from 1 2 µg/1 (MW-3) to 260 �tg/I (VW-4), none of the other oxygenated volatile organics <br /> were detected at concentrations above laboratory reporting limits <br />' • After all of the wells have been sampled in order of the least contaminated to the most <br /> contaminated, an equipment blank was collected by passing tap water through a <br />' decontaminated purge pump Detectable concentrations of TPH-g and BTEX compounds <br /> were assessed in the equipment blank, oxygenated volatile organic compounds were not <br /> detected <br /> t • The extent of impacted soil and ground water has not yet been defined <br />' S.O. RECOMMENDATIONS <br />' Based upon data collected from the site, AGE recommends <br />' • Continued ground water monitoring, the next ground water monitoring event is scheduled <br /> for December 2001 <br /> • Based on the analytical results of the equipment blank,AGE will install anadditional clean- <br /> water rinse in the decontamination procedures <br /> A cone-penetrometer test (CPT) survey was conducted on 13 to 15 November 2001 to assess the <br />' vertical and lateral extent of impacted soil and ground water, to define hydrogeologic flow units at <br /> the site, and to optimize locations of additional monitoring and extraction wells The report <br /> presenting the results of this investigation is in preparation <br /> 1 <br /> • <br /> 1 <br /> Advanced GeoEnvnronmental,Inc <br /> I <br />