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Contaminated water developed from purging the monitoring wells was <br /> stored in 55 gallon drums on site. The drums were labeled with the <br /> site location, date of accumulation, contents, and the consultants <br /> name and phone number. <br /> A request to identify water wells within a 2 , 000 feet radius of <br />' the subject site was submitted to the California Department of <br /> Water Resources on 9 October 1992 . It has been noted that the <br /> ground water gradient beneath the subject site has shown seasonal <br />' reversals. We believe that the cause of this is probably a pumping <br /> well that is located to the north of the subject property. The <br /> obtaining of this data and the confirmation of this phenomenon will <br /> aid us greatly in the placement of future wells and in the design <br /> of a site remediation. <br /> FINDINGS <br />' Ground water was measured at a depth of approximately 85 to 87 feet <br /> in 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 . 001, to the north (Figure 2) . <br /> TPH was detected at 80, 800 µg/1 and 2 , 200 Ag/1 in the water samples <br /> from MW1 and MW3 , respectively (Table 2) . BTE&X were also detected <br /> in water samples MW1 and MW3 . TPH and BTE&X were not detected, at <br /> a detection limit of . 3 µg/l to . 5 µg/i, in the water samples from <br /> MW2 . <br /> The laboratory analysis and chain of custody are attached. The <br /> quality control/quality assurance data and laboratory state <br /> certification will follow under a seperate cover. <br /> CONCLUSIONS <br /> The ground water gradient has changed from a westerly direction to <br /> a northerly direction. It is not known if this change is seasonal, <br /> due to a nearby water well or a combination of both (Figure 1) . <br /> Monitoring well 2 shows a decrease in TPH and BTE&X concentrations <br />' over time. The decrease in TPH and BTE&X concentrations over time <br /> is consistent with a natural degradation of these contaminants over <br /> time. However, TPH and BTE&X concentrations in monitoring wells MWl <br /> and MW3 have fluctuated. <br /> The limits of the ground water contaminate and the soil contaminant <br /> plumes have not been determined. <br /> U-HAUL \ 2701 WILSON WAY <br /> MJB-92-11 \ UH-WILSON RPT (SD5020 2) <br /> 10 OCTOBER 1992 <br /> 3 <br />