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41 <br />' Quarterly Report - Second Quarter 2005 <br /> FERNANDO'S PLACE <br /> 1201 South Center Street, Stockton, California r <br /> i <br /> 1.0. INTRODUCTION <br /> At the request of Mr Roger Huckms,Advanced GeoEnvironmental, Inc (AGE) has prepared this <br />' quarterly report for the property located at 1201 South Center Street,Stockton,California(site) The <br /> scope of work included the performance of quarterly ground water monitoring, submission of , <br /> monitoring and analytical data to the State Water Resources Control Board's GeoTracker } <br /> information management system, and preparation of this report The location of the site and the <br /> surrounding area is illustrated on Figure 1, structures, former underground storage tank (UST) <br /> locations,and soil boring and monitoring well locations are illustrated on Figure 2 Site background <br /> h information is provided in Appendix A <br /> r <br /> Based on the results of previous investigations, AGE has informally identified five hydrogeologic , <br /> units between first encountered ground water and 199 feet below surface grade (bsg) as having <br /> significant intervals of apparently porous,coarser-grained soil separated by intervals of finer-grained, <br />' less permeable soil (Appendix A) Hydrogeologic Unit 1 (HU-1) was identified at depths between ' <br /> 25 feet(first encountered ground water)and 90 feet bsg,it was subdivided into three sub-units(HU- <br /> H 1 Upper Zone,HU-1 Middle Zane, and HU-1 Lower Zone)that may not have significant barriers to <br /> • vertical migration of contaminations Hydrogeologic Unit 2(HU-2)was identified at depths between <br /> 112 feet and 125 feet bsg, Hydrogeologic Unit 3 (HU-3) was identified at depths between 140 feet <br /> and 160 feet bsg, Hydrogeologic Unit 4 (HU-4) was identified at depths between 160 feet and 175 <br /> feet bsg, and Hydrogeologic Unit 5 (HU-5) was identified at depths between 190 feet and 199 feet <br /> bsg <br /> 2.0. PROCEDURES <br /> a <br /> Field work was performed in accordance with guidelines issued by the Central Valley Regio'nal 4 <br /> Water Quality Control Board (CVRWQCB) and the San Joaquin County Environmental Health- <br /> Department(EHD) for the investigation of underground storage tank(UST) sites and the sampling, <br /> fof ground water monitoring wells, respectively <br /> 2 1 WELL MONITORING AND EVACUATION <br /> On 19 and 20 May 2005, ground water monitoring and sampling-were performed at one single- <br />' completed monitoring well location (MW-1), two clustered monitoring well locations (MW-2A/B <br /> , <br /> and MW-3AB),and six multi-chambered monitoring well locations[MW-4(A-E),MW-5(A-E),and <br />' MW-6(A-D) through MW-9(A-D)], a total of 31 well points were monitored and sampled Due to , <br /> lack of response AGE was uriable to report ground water monitoring data for the adjacent Arc Weld <br /> • and Pump site I <br /> Advanced GeoEnvironmentai,inc <br /> 1 <br />