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CLEAWRT-ER G R Q U P Environmental Services soil samples and one groundwater sample were analyzed from each boring Soil concentrations of TPHg and BTEX were detected only in boring MW-5B The highest soil concentration of TPHg (1,000 mg/kg) was detected at 25 feet bgs in MW-513 This sample was also analyzed for TPH as Jet Fuel and found to contain 55 mg/kg Detectable concentrations of BTEX were present in soil samples collected from boring MW-5B at 25 feet and 35 feet bgs MTBE was not detected by EPA method 8260 in any of the soil samples analyzed Groundwater concentrations of TPHg and BTEX were detected in borings SB-9, MW-5B, MW-7 and MW-8 The highest groundwater concentration of TPHg (9,700 µg/L) was detected in MW-5B MTBE was not detected by EPA method 8260 in any of the groundwater samples analyzed A dual-phase test well and air sparge point was installed at the site in February, 2002 Remedial feasibility testing at the site was conducted during the week of March 10, 2002 The Well Installation and Feasibility Testing Report was sent on May 9, 2002 From data collected during these activities, Clearwater developed and submitted to the EHD a Corrective Action Plan dated November 20, 2002 Beginning in June, 2000 groundwater in all monitoring wells has been sampled on a calendar quarterly basis These sampling events took place on June 6, 2000, August 28, 2000, November 14, 2000, February 13, 2001, May 30, 2001, August 22, 2001, October 11, 2001, February 14, 2002, May 10, 2002 and September 30, 2002 Reports documenting these activities have been previously transmitted to the EHD by Clearwater OBJECTIVES In continuance of quarterly groundwater monitoring activities, the objectives of this current project were to gather groundwater samples from all monitoring wells at the site and to analyze the groundwater samples for hydrocarbon contamination GROUNDWATER MONITORING AND SAMPLING ACTIVITIES Groundwater monitoring and sampling activities were conducted on December 4, 2002 Groundwater elevation data were obtained from each of the monitoring wells A water level indicator was used for this purpose The water level indicator was thoroughly rinsed with distilled de-ionized water prior to placement in each well to prevent possible water quality influence from exterior sources Groundwater elevations were derived and are tied to previously determined well surface elevation data Before sampling, the wells were purged of approximately three wetted casing volumes from each well until water quality parameters had stabilized All wells were checked for the presence of light non-aqueous-phase liquids (LNAPL) prior to purging LNAPL were not observed to be present in any well Stabilization measurements of purged groundwater temperature, conductivity and pH were made and recorded for each well Well stabilization data are enclosed in Appendix B ZB178C/4Q Monitoring Rpt 3 January 8,2003