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l , , <br /> f5CIjj <br /> C40109kdrechItIcs Inc. <br /> 110 1 7`h Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax(209)522-4227 PERMIT I i"IERVICES <br /> September 9, 2008 <br /> Project No.: 770.2 <br /> Project Name: Marci Property <br /> Vicki McCartney—San Joaquin County Environmental Health Department <br /> RE: Revision- Groundwater Monitoring Schedule <br /> Marci Property, 2969 Loomis Road, Stockton, CA <br /> Hello Vicki: <br /> Geological Technics Inc. has reviewed the analytical data for the above mentioned site and <br /> would like to decrease the frequency of sampling of the following wells from quarterly to semi- <br /> annually (2nd and 4th quarters) because of the reasons given below as well as being a cost savings <br /> for the project: <br /> ■ MW-104: it has been Non-detect (ND) for all constituents in all monitoring events since <br /> March 2003. <br /> ■ MW-105: it has been Non-detect for all constituents in all monitoring events since February <br /> 2005. <br /> ■ MW-106: it has been Non-detect for all constituents in all monitoring events except <br /> November 17, 2006. TPH-D was detected at 100 pg/l. Because all other events have been <br /> ND, this is suspect data and may have been either a field or laboratory error. <br /> ■ MW-2: it has been Non-detect for all constituents in all monitoring events since December <br /> 2001. <br /> Please let me know if you have any question and I look forward to hearing from you regarding <br /> this proposal. We are in the process of getting bids for 2009 lab analysis and need to know the <br /> number of wells covered in groundwater monitoring as soon as possible. Thank you very much. <br /> Respectfully submitted, <br /> Reza Namdar Ghanbari <br /> Project Manager <br /> cc: Mrs. Margaret Marci <br /> _ I <br /> i <br />