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• i <br /> Montgomery Wards page 2 <br /> 5400 Pacific Ave., Stockton. <br /> Bio-remediation rather than destroying them. Recent changes in groundwater <br /> monitoring requirements have been issued by the Central Valley Regional Water Quality <br /> Control Board (CVRWQCB), and enclosed for your use is the policy adopted by PHS- <br /> EHD to comply with the requirements. Please modify your sampling procedures to <br /> include EPA Method 8260 for groundwater analysis for all wells , for all quarters at <br /> this site. Please include sampling any vapor extraction well that contains groundwater <br /> also. Check with the Department of Health Services certified laboratory you are <br /> currently utilizing and ensure that the detection limit for the five to seven oxygenates is <br /> not greater than 5.0 ug/I (parts per billion, "ppb"). The sampling for oxygenates shall <br /> begin with the very next quarterly sampling event and continue on a quarterly basis. <br /> Please have your consultant call Mr. Infurna and schedule the field inspection with at <br /> least forty-eight (48) working hours notice. <br /> Please adjust your sampling schedule to ensure that the quarterly monitoring reports are <br /> submitted to PHS-EHD before the next quarterly sampling event. <br /> Your revised CAP should be updated to include an evaluation of groundwater <br /> remedial efforts, costs for all methods, implementation time schedules, and <br /> should be submitted to PHS-EHD by April 13, 1998. <br /> Please contact Michael Infurna, Senior REHS, at (209) 468-3454 if you have any <br /> questions, wish to schedule a field inspection, or if you would like to discuss the site. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> �— <br /> Michael J. Infurna Jr., Senior REHS Margaret Lagorio, REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> MI/ <br /> enclosure (addressee only) <br /> c: CVRWQCB - Pat Anderson <br /> c: SWRCB-CUF - James DiGiorgio <br /> c: EAI - Wallid Kazi, RG, 1000-A Ortega Way, Placentia, 92670-7125 <br /> c: Gilmartin & Leberthon - M. Gilmartin, 100 Wilshire Blvd.,#1325 LA. 90401 <br /> c: Stone Bros. &Assoc. - B. Hippensteel, 1024 W. Robinhood, Stockton, 95207 <br /> c: Altheimer & Gray - S. Bezark, 10 S. Wacker St.,#4000, Chicago, IL., 60606 <br /> c: SJ Delta College - T. Cardinale, 5151 Pacific, Stockton, 95207 <br />