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A S S O C I A T E S I N C <br /> concentrations of petroleum hydrocarbons Field activities and analytical results were detailed in <br /> ATC's Summary Report ofAdditional Investigation, dated October 19, 1998 <br /> In April 2000, ATC personnel supervised the advancement of three soil borings at the site, S138 <br /> through SB 10 Soil borings were advanced using a truck mounted Geoprobe® narrow diameter <br /> rig employing direct push technology Soil and groundwater samples were collected and <br /> analyzed from each boring and were found to contain no detectable concentrations of total <br /> petroleum hydrocarbons as gasoline (TPHg), total petroleum hydrocarbons as diesel (TPHd), <br /> benzene, toluene, ethylbenzene, xylenes (BTEX), or methyl tertiary butyl ether (MTBE) Field <br /> activities and analytical results were detailed in ATC's Summary Report ofAdditional Subsurface <br /> Investigation, dated September 7, 2000 <br /> In June 2000, ATC personnel supervised the advancement of three additional soil borings, MW4 <br /> through MW6 The borings were advanced using hollow stem auger drilling Approximately ten <br /> inches of free product was discovered in boring MW4 at a depth of 20 feet bgs In accordance <br /> with the approved work plan, the borings were completed as groundwater monitoring wells <br /> MW4, MW5 and MW6 Soil and groundwater samples taken from MW4 contained detectable <br /> concentrations of TPHg and TPHd, but did not contain detectable concentrations of BTEX or <br /> MTBE Soil and groundwater samples from MW5 and MW6 did not contain detectable <br /> concentrations of TPHg, TPHd, BTEX, or MTBE Field activities and analytical results were <br /> detailed in ATC's Summary Report of Additional Subsurface Investigation, dated September 7, <br /> 2000 <br /> SAMPLING ACTIVITIES <br /> On September 7, 2000, groundwater samples were collected by ATC personnel from monitoring <br /> wells MW3 through MW6 Well MW I was inaccessible at the time of sample collection due to a <br /> cotton seed stockpile covering the well, and well MW2 contained approximately one-eighth <br /> inches of free product The locations of the monitoring wells are shown on Figure 2 Prior to <br /> collection of groundwater samples, the depth to water, pH, electrical conductivity, and <br /> temperature were measured in the monitoring wells and recorded A minimum of three well <br /> casing volumes were purged from each well prior to sampling The wells were allowed to <br /> recover and samples were collected from each well using dedicated disposable bailers <br /> The groundwater samples collected from each well were submitted to State-certified Argon <br /> Laboratories, Inc (ELAP Cert No 2358) for chemical analysis of TPHg and TPHd utilizing <br /> EPA method 8015 modified, and BTEX and MTBE utilizing EPA Method 8020 Groundwater <br /> well purge and sample logs are contained in Attachment 1 <br /> GROUNDWATER FLOW DIRECTION <br /> On September 7, 2000 Penny Newman Grain personnel stated that they would attempt to remove <br /> the cotton seed stockpile covering well MW1 ATC personnel returned to the site on September <br /> w 1625001quart1yl3gr-2000 doe 2 <br />