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1 <br /> 16 Seven water samples, including a trip blank, were analyzed for <br /> total petroleum hydrocarbons (TPH) and purgeable aromatic <br />' hydrocarbons (BTE&X) in accordance with the DHS Method 8015-m and <br /> EPA Method 602, respectively. <br /> Contaminated ground water generated from the developing and purging <br />' of the monitoring wells was stored in a 55-gallon drum on site. The <br /> drum was labeled with the site location, date of accumulation, <br /> contents, and the consultant's name and phone number. <br />' FIND <br />' Ground water was measured at a depth of approximately 78 feet in <br /> the monitoring wells. The relative casing elevations, depth to <br /> water and piezometric surface determined from the monitoring well <br />' measurements are recorded in Table 1. The ground water gradient is <br /> generally flat, less than . 01, to the west (Figure 2) . <br />' TPH and BTE&X were detected in ground water samples obtained in <br /> monitoring wells MW1, MW4, MW5, and MW6 (Table 2) . TPH and BTE&X <br /> were not detected in ground water samples obtained from monitoring <br /> wells MW2 and MW3 or in the trip blank (Table 2) . <br /> 1 The laboratory analysis, quality control/quality assurance data, <br /> and the chain of custody are attached. <br /> CONCLUSIONS <br />' Total petroleum hydrocarbons and BTE&X have been detected in <br /> monitoring wells MW1, NIW4 , MW5, and MW6. <br /> Monitoring wells MW1 and MW4 are both up-gradient of the fuel <br /> dispensing islands and the former underground storage tanks. The <br /> high concentrations of contamination in the ground water in MW1 <br /> indicate that there may be an off-site source of petroleum <br />' hydrocarbon to the southeast of the subject property. <br /> Monitoring well MW5 is located to the north of both the fuel <br />' dispensing islands and the former underground storage tanks. <br /> Monitoring well MW6 is located directly down-gradient from both the <br /> fuel dispensing islands and the former underground storage tanks. <br />' Furthermore, two additional monitoring wells are located between <br /> the monitoring well MW6 and the area of known ground water <br /> contamination. Water samples from these two additional wells, MW2 <br />' and MW3 , did not contain detectable concentrations of TPH nor <br /> BTE&X, Suggesting that an additional contaminant plume exists on <br /> the property. <br /> U-HAUL 1 2701 N WILSON WAY <br /> M7B-93-V!U-HAUL QM5 (SD5783 3) <br />' 19 OC1'O$8R 1993 4 <br /> 1 <br />