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RECEIVED <br /> Geolagical 7eck�ics lfZc. SEP 0 7 2011 <br /> 1172 Kansas Avenue <br /> Modesto,Califomia 95351 ENVIRONMEN'•qL HEALTH <br /> (209)522-4119/Fax(209)522-4227 PERMIT/SERV10ES <br /> www.gtienv.com <br /> August 31, 2011 <br /> Project No.: 507.2 <br /> Project Name: J.M. Equipment(Charter Way) <br /> Mr. Michael hlfurna <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street <br /> Stockton CA 95202-3029 <br /> RE: Groundwater Monitoring Schedule for the fiscal year 2011/2012 <br /> J.M. Equipment, 1245 W. Charter Way, Stockton, CA <br /> Dear Mr. Infurna: <br /> We are writing to propose the following for groundwater monitoring plan for the fiscal year <br /> 2011/2012. Our goal is to minimize costs and still obtain pertinent data for making decisions. We <br /> propose following: <br /> 1. Discontinue monitoring for the following wells: MW-1, -2, -3, -7, -10 & -109. <br /> 2. Four wells to be monitored semi-annually on the second and fourth quarters for TPH-G, BTEX <br /> & MtBE, using method 8015m/8021b: MW-4, -6, -8 & -9. <br /> 3. Four remedial observation wells to be monitored monthly for TPH-G, BTEX & MtBE, using <br /> method 8015m/8021b: MW-5, OW-1, -2 & -3. <br /> 4. These same observation wells to be monitored semi-annually on the second and fourth quarters <br /> for metals: MW-5, OW-1, -2&-3 <br /> 5. Based on the analytical results from the composited soil samples collected at the site between <br /> June 27 and June 29, 2011,the metals analysis will be limited to As, Ba, CrVI,Fe, K and Mg. <br /> 6. Groundwater monitoring will include depth to water measurements in all monitoring wells. <br /> Please let me know if you have any questions and I look forward to hearing from you regarding this <br /> proposal. Thank you very much. <br /> Resp tfully S mit <br /> l <br /> Rayno d <br /> 'd <br /> lan w , PhD <br /> PG, CHG, REAII <br /> cc: George Betker, Geo Corp <br /> Catherine Kahler, JM Equipment <br />