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' ! 0 <br /> ENVIRONMENTAL AUDIT, INC. <br /> 4 <br /> 1000-A ORTEGA WAY • P&,QCENTIA, CA 92616-7125 <br /> 0 714/632-8521 • FAXi 714/632-M#4 <br /> January 26, 1998 <br /> Project No. 1232 <br /> Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> 1601 East Hazelton Avenue <br /> Stockton, CA 95201-6229 <br /> RE: SAN JOAQUIN DELTA COLLEGE IRRIGATION WELL <br /> Quarterly Monitoring <br /> (Site Code 2163 - Montgomery Ward) <br /> Dear Mr. Infuma: <br /> Reference your letter to Montgomery Ward dated December 29, 1997, which among other <br /> things, requested that Montgomery Ward and Unocal provide a schedule and protocc}I for <br /> quarterly monitoring of the irrigation well owned and operated by San Joaquin Delta College <br /> located near the southwest corner of the intersection of Pacific Avenue and Robinhood Drive. <br /> Montgomery Ward is willing to comply with your request. <br /> Montgomery Ward proposes that Unocal and it alternate monitoring events, i.e., Montgomery <br /> Ward will complete the monitoring for the Second Quarter 1998, Unocal will complete the <br /> Third Quarter 1998 event, and so on. EAI was informed that Delta College has installed a <br /> sampling port on a part of the irrigation well extraction piping. Ground water samples from <br /> the well will be collected from this port. Each sample will be tested for total petroleum <br /> hydrocarbons as gasoline by modified EPA Method 8015, and volatile organic compounds <br /> including methyl tertiary butyl ether by EPA Method 8260. <br /> EAI contacted Dan Watson at Delta College regarding the sampling port recently installed on <br /> the irrigation well. Mr. Watson and EAI agreed that using the sampling port to collect ground <br /> water for analytical testing will only provide representative samples of ground water from the <br /> aquifer when the well is being used to extract ground water for irrigation purposes, usually <br /> between the months of April to October. Sampling can be performed at other times but i will <br /> only provide a sample of the standing water within the well. Therefore, please confirm that <br /> the County stills desires sampling of the well when it is not in use. <br /> EAI staff and Ms. Toni Cardinelli of Delta College have discussed providing representath es of <br /> Montgomery Ward and Unocal access to the site. Ms. Cardinelli stated Delta College is <br /> willing to grant access rights for the purpose of sampling the irrigation well. <br /> EAI staff contacted Bob Baust of Unocal to discuss alternating sampling events. Unocal <br /> indicated that it would prefer that Montgomery Ward complete all the sampling events and <br /> PLANNING,ENVIRONMENTAL ANALYSES AND <br /> HAZARDOUS SUBSTANCES MANAGEMENTAND REMEDIATION <br />