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} <br /> d <br /> 24 March 1993 <br /> _ (GeoAudit 640-S) <br /> Page 3 of 5 <br /> ' to have an arbitrary elevation of 30 feet. <br /> After water levels were measured, a three-stage purge pump was used <br /> to surge and purge each well. Approximately IA—tsZ_l6 gallons of � 1� <br /> water were removed from each well, except MW-5 which went dry after <br /> removing 5 gallons, to stabilize temperature, pH and conductivity <br /> (see Table 2) . The purge water was stored in 55-gallon drums on- <br /> site. <br /> Table 1 <br /> Relative Groundwater Elevations <br /> Relative Relative <br /> Well No. Depth to Casing Groundwater 3C <br /> Groundwater Elevation Elevation <br /> ?� b", MW-1 14. 14 26.90 12 .76 5` <br /> y 7,( MW-2 �S�a� 14 . 36 26.93 12 . 57 V-7 <br /> v yj MW-3 12 .88 26.84 13 .96 <br /> tis _ MW-4 1,7� 13 .76 26. 79 13 . 03 ZZ- C)'7 <br /> ZU Z" MW-5 15. 56 29 . 13 13 . 57 Z• 01 <br /> I <br /> Water samples were collected using disposable plastic bailers. The <br /> samples were collected in 40 ml EPA vials and 1-liter amber <br /> bottles. The water samples were analyzed for TPH as gasoline and <br /> BTE&X in accordance with EPA methods 8015m and 602, respectively. <br /> The sample from MW-5 was also analyzed for TPH as diesel and <br /> halogenated volatile organics (EPA 601) . <br /> FINDINGS <br /> The borings penetrated sandy silts, silty sands and sandy silts <br /> with clay. Some well sorted sands were also encountered. During <br /> drilling, water was encountered at a depth of approximately 18 - 20 <br /> feet in each boring (see Boring Logs) . <br /> Groundwater flow direction at the site was calculated to be to the <br /> east-northeast. The relative groundwater elevations are contoured <br /> in Figure 3 . <br /> Hydrocarbon odors were observed in soil samples from Borings #1, <br /> #2 , #3 and #5. However, volatile organic vapors were detected by <br /> the PID only in samples from Borings #1 and #3 (40 ppm and 505 ppm, <br />