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Quarterly Report - Fourth Quarter 2005 >a ENTERPRISE INVESTMENTS (Former J.B.Murphy Trucking) 355 Enterprise Place, Tracy, California 1.0. INTRODUCTION i- At the request of Mr. Monty Warren of Enterprise Investments,Advanced GeoEnvironmental,Inc. (AGE)has prepared this quarterly report for 355 Enterprise Place,Tracy,California(site).The scope of work included purge water disposal,performance of a quarterly ground water monitoring event, submission of monitoring and analytical data to the State Water Resources Control Board's i GeoTracker information management system, and preparation of this report. The site an surrounding area are illustrated on Figure 1. Structures,soil borings, and monitoring and extraction well locations are illustrated on Figure 2. Site background information is provided in Appendix A. 271 2.0. PROCEDURES Five ground water monitoring wells (MW-1 through MW-5)and one ground water extraction well (EW-1) were monitored and sampled on 25 November 2005. Field work was performed in accordance with guidelines issued by the Central Valley Regional Water Quality Control Board (CVRWQCB)for the investigation of underground storage tank(UST)sites and by the San Joaquin County Environmental Health Department (EHD) for the sampling of ground water monitoring wells. 2.1. PURGE WATER DISPOSAL On 10 October 2005,approximately 165 gallons of non-hazardous purge water were pumped from ` on-site 55-gallon drums. The purge water had been generated by previous ground water monitoring events. Pumping and disposal were completed by American Valley Waste Oil, Inc. of Delhi, California.The purge water and waste soil were taken to Cascade General,Inc.,located in Portland, =- Oregon. A copy of the waste disposal manifest is included in Appendix B. 2.2. WELL MONITORING AND PURGING F., On 25 November 2005, a Solinst water level meter was used to measure the depth to ground water in wells MW-1 through MW-5 and EW-1 relative to the tops of the well casings (well heads). The ground water elevations and gradient were determined from this data(Table 1). After recording water level measurements,disposable plastic bailers were used to purge wells MW-1 through MW-5 of standing water; a three-stage pump was used to purge well EW-1 of standing water. Approximately 3.5 to 10.5 gallons of water (a minimum of three casing water volumes per well) were removed from wells MW-1 through MW-5; approximately 40 gallons of water were Advanced GeoEnvironmental,Inc.