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� 3 � The twenty samples were composited by the laboratory into five samples for analysis. The composrted samples were each analyzed for TPH as gasoline, BTE&X, and Total Lead Upon completion of the soil characterization, the soil was transported on December 1, 1993, ' by R Bauerle Trucking to B & J Landfill, Inc in Vacaville, California under Non -hazardous ol I Waste Manifest (Manifest Numbers 3802 through 3822, 5125 through 5129, and 4942) 1R 2.8 Quarterly Groundwater Monitoring, October 1993 i Fd` On October 14, 1993, personnel from GeoAudit attempted to purge standing water from the monitoring wells using a submersible pump However, because of heavy equipment operation at the site during excavation and soil disposal, the wells contained too much silt' and could not be purged Personnel returned to the site on October 18, 1993 to redevelop E the wells and perform the monitoring Between June 1993 and October 1993, water levels Idropped approximately one foot in all wells (Table 5) The hydraulic gradient was calculated ` to be 0 0050 ft/ft directed S 72° E This gradient is steeper than, the previous gradient of d 0025 ft/ ', but the direction is nearly identical to the previous calculated direction of S 70° " E No petroleum hydrocarbons were detected in any of the samples (Table 5) ' 2.9 Quarterly Groundwater Monitoring, January 1994 On January 14, 1994 each well was monitored and sampled for the fourth time ' Groundwater depths were measured and wells were purged using PVC bailers Samples were collected using disposable plastic bailers and the samples were transported to STI Between ' October 1993 and January 1994, groundwater rose approximately 2 5 feet in all wells (Table 5) The gradient was calculated to be 0 00032 ft/ft, oriented due east Initially, benzene, toluene and xylenes were detected in MW -3 However, these results were determined to be questionable by GeoAudit and the sample (MW -311-14-94) was reanalyzed, Upon reanalysis, no petroleum hydrocarbons were detected in the sample (Table 5). 3.0 GROUNDWATER MONITORING, APRIL 1994 3.1 Well Monitoring and Sampling On April 15 1994, personnel from GeoAudrt performed the quarterly monitoring The depth to groundwater in each well was measured using a Solinst water level meter (Table 4) After water levels were measured, the wells were purged to stabilize the temperature, pH, and conductivity using PVC bailers An ICM water analyzer was used to measure the stability parameters Approximately 10 gallons of water were purged from each well to stabilize the temperature, pH, and conductivity The purge water was placed in DOT -approved drums and stored on-site The groundwater stabilization data and field data sheets are included in Appendix A 8 161/49UMd-�] QR