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u . <br /> N <br /> Via+ I l p9s <br /> 76 Broadway <br /> Sacramento, California 95818 <br /> August 13, 2009 <br /> Mr. Harlin Knoll <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street <br /> Stockton , CA 95202-3029 <br /> SITE : CONOCOPHILLIPS SITE #08671 <br /> 8606 THORNTON ROAD <br /> STOCKTON , CALIFORNIA <br /> Agency Case #: 2261 <br /> SUBJECT : GROUNDWATER MONITORING SCHEDULE PER SWRCB RESOLUTION NO, <br /> 2009-0042 <br /> Dear Mr. Knoll : <br /> Pursuant to the State Water Resources Control Board (SWRCB) adopted Resolution No. 2009- <br /> 0042 dated May 19, 2009, this letter proposes a groundwater monitoring frequency and <br /> schedule for the Site. A Site summary of the proposed sampling frequency consistent with the <br /> Geotracker format is presented in the matrix below: <br /> FREQUENCY NUMBER OF WELLS SAMPLED <br /> BEFORE* CURRENT** <br /> Monthly <br /> Quarterly 10 5 <br /> Semi-Annual 2 <br /> Annual 3 <br /> Other <br /> Notes: = equivalent term for BEFORE on the attached spreadsheet is CURRENT. <br /> * = equivalent term for CURRENT on the attached spreadsheet is PROPOSED. <br /> The reasons or rationale for a groundwater monitoring frequency other than semi-annual are <br /> summarized consistent with the Geotracker format and are presented in the following matrix: <br />