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GROUNDWATER MONITORING AND SAMPLING REPORT - "QUEST FOR NO FURTHER ACTION UNIVERSITY OF THE PACIFIC 1081 W MENDOCINO AVENUE, STOCKTON, CALIFORNIA Assessor's Parcel Number: 113-144-42 County of San Joaquin Site Code: R0732 I. INTRODUCTION On behalf the University of Pacific(UOP),Environmental Science Associates(ESA)has prepared this report to provide results of groundwater monitoring and sampling conducted at the former underground storage tank(UST)site,located at 1081 W Mendocino Avenue in Stockton, California(Figure 1) This assessment work was completed between January 2002 and April 2003 and represents the latest phase of soil and groundwater assessment associated with this UST case Soil and groundwater assessment work was initiated for this case in July 2000 In addition to providing results of the previous and current the soil and groundwater assessment,this report also provides necessary data to support a request for No Further Action Following the removal of an underground storage tank(UST) in April 2000,UOP retained ESA to complete follow-up soil and groundwater investigations to determine the extent of methyl tertiary- butyl ether(MTBE)in groundwater detected during the UST removal Conducted in 2000 and 2001,these assessments included drilling and sampling exploratory soil bonngs and obtaining shallow soil and groundwater from selected locations Details of the previous soil and groundwater investigations can be found in the following reports that were submitted to the San Joaquin County Environmental Health Division(SJCEHD), a brief summary of the results of the investigations follows • Site Investigation Workplan University of the Pacific, 1081 West Mendocino Avenue, June 8, 2000 • Subsu ace Soil and Groundwater Assessment Report University of the Pacific, 1081 West Mendocino Avenue, August 25,2000 • Additional Groundwater Assessment Work lap University of the Pacific, 1081 West Mendocino Avenue, November 28,2000 _" -_ -- - - r- - -- T - _ • Additional Groundwater Assessment Report, University of the Pacific, 1081 West Mendocino Avenue, March 26,2001 • Groundwater Monitoring Well Installation Workplan, University of the Pacific, 1081 West Mendocino Avenue, September 27, 2001 Groundwater Assessment Report t ESA 1200252 September 2003