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iQuarterly Report - Second Quarter 2005 <br /> . NATIONAL FREIGHT <br /> ' 2850 Loomis Road, Stockton, Cakfornla <br /> I.O. INTRODUCTION <br /> At the request of Mr Daniel Folcher of Vineland Construction Co ,Advanced Geo Environmental, <br /> Inc (AGE) has prepared this report of environmental activities conducted at 2850 Loomis Road, <br /> Stockton,California(site) The scope of work Included the monitoring and sampling of five ground <br /> water monitoring wells, analysis of the ground water samples, and preparation ofiis,report The , sb, <br /> location of the site and surrounding area are illustrated on Figure 1 On-site`sfrucfii es and the 41 <br /> locations of monitoring wells are illustrated on Figure 2 <br /> ' Site background information can be found in the AGE-prepared Preliminary Investigation and <br /> Evaluation Report, dated 12 October 1999, and Additional Site Assessment Report,dated 09 April <br /> 1 2002 <br /> 2.0. PROCEDURES <br /> Field procedures were performed in accordance with Central Valley Regional Water Quality Control <br /> ' • Board(CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites and <br /> San Joaquin County Environmental Health Department(EHD)guidelines for the sampling of ground <br /> water monitoring wells The procedures were performed in accordance with the AGE-prepared and <br /> EHD-approved Monitoring Well Installation Work Plan, dated 09 June 2000 <br /> 21 PURGE WATER DISPOSAL <br /> On 14 April 2005,approximately 75 gallons of non-hazardous purge water was pumped from on-site <br />' 55-gallon drums The purge water had been generated during previous ground water monitoring <br /> events Pumping and disposal was completed by American Valley Waste Oil, Inc of Delhi, <br /> California The purge water was disposed of at Riverbank Oil Transfer located in Riverbank, <br />' California A copy of the waste disposal manifest is included in Appendix A <br /> 2 2 WELL MONITORING AND PURGING <br /> On 30 June 2005, the depth to ground water in monitoring wells MW-1 through MW-5 was <br /> measured from the top of each well casing to the nearest 0 01-foot utilizing a Solinst water level - - <br /> meter The ground water elevation in each well was calculated by subtracting the measured depth <br /> to ground water from the surveyed casing elevation(Table 1) <br /> . After water levels were measured, between 6 and 8 gallons of water (a minimum of three casing <br /> Advanced GcaEnvironmcntal,Inc , <br />