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San Joaquin County DIRECTOR <br /> o u N Donna Heran,REHS <br /> ,o �o Environmental Health Department <br /> iG ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla,RENS <br /> N. Q� Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> •:� Carl Borgman,REHS <br /> Mike Huggins,REHS, RDI <br /> q r F o R rig <br /> Website: WWW.w.S/gov.org/ehd' Margaret Lagorio,REHS <br /> Phone: ,(209) 468-3420 Robert McClellon,REHS <br /> Fax: (209)464-0138 Jeff Carruesco,REHS,RDI <br /> Kasey Foley,REHS <br /> September 18, 2008 <br /> John and Margaret Marci <br /> 20 Mobile Lane - <br /> Crescent City, California. 95531-8409 <br /> Subject: John and Margaret Marci Property <br /> 2969 Loomis Road <br /> Stockton, California 95205 <br /> The San Joaquin County Environmental Health Department (EHD) has received a request <br /> from Geological Technics 'Inc. to reduce the frequency, of sampling monitoring wells <br /> MW-2, MW-104, MW-105, and MW-106 from quarterly to semi-annually. Geological <br /> Technics Inc. requested this reduction by letter dated September 9, 2008. <br /> The EHD has reviewed the historical analytical data for groundwater samples collected at <br /> the above-referenced site and approves moving MW-2, MW-104, MW-105, MW-106, in <br /> addition to MW-3 and MW-8 from the quarterly to the annual groundwater-monitoring <br /> program as annual monitoring of ihese wells appears to be adequate to track the plume. <br /> Please sample these wells during the fourth quarter sampling event; however, do not <br /> exclude these wells.from having the,water level measurements documented each quarter <br /> for the purpose of determining the groundwater gradient. <br /> If.you have any questions, please contact Vicki McCartney at (209) 468-9852 or by email <br /> at vmccar(ne}@sjcehd.com.. <br /> Sincerely, <br /> Victoria L. McCartney, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: Mr. Reza Namdar Ghanbari, Geological Technics Inc., 1101 7th Street, Modesto, <br /> California 95354 <br /> Mr. James L.L. Barton, PG, California Regional Water Quality Control Board. Central <br /> Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br />