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I <br /> Advanced <br /> GeoEnvironmental , Inc ® <br /> 18 November 2008 <br /> AGE-NC Project No. 95-0121 <br /> Mr. Mike Infurna <br /> SAN JOAQUIN COUNTY ENVIRONMENTAL HEALTH DEPARTMENT <br /> 600 East Main Street <br /> Stockton, CA 95202 ; P, 'iif3tiUi�ES <br /> Subject: Request for Reduction in Quarterly Monitoring Frequency <br /> NOMELLINI CONSTRUCTION CO., <br /> 1045 West Charter Way, Stockton, California <br /> Dear Mr. Infuma: <br /> On behalf of Mr. Dante John Nomellini, Advanced GeoEnvironmental, Inc. (AGE) is requesting <br /> approval by the San Joaquin County Environmental Health Department (SJCEHD) for a reduction <br /> in the sampling frequency of ground water monitoring and remediation wells at 1045 West Charter <br /> Way, Stockton, California. Attached is the proposed reduced monitoring schedule, with a brief <br /> justification for the reduction of sampling. The site setting is illustrated on Figure 1 . Site structures <br /> and monitoring well locations are depicted on Figure 2. <br /> The current monitoring program includes the following: <br /> • Depth to water measurements in all wells; <br /> • Sampling of twenty-three (23) monitoring and remediation wells. <br /> The proposed monitoring program would include the following: <br /> • Depth to water measurements in all wells; <br /> • Sampling of deep wells MW- 13 , MW. 14, and MW- 15, and shallow screened wells MW-2, <br /> MW-4, MW-5, and MW-6. This will reduce the redundancy of sampling points and the <br /> overall cost. <br /> • Sampling of shallow-screened remediation well EW- 1 to monitor the contaminant <br /> concentration in the "core" area of the plume (Figure 2). <br /> AGE also proposes to monitor and sample all of the site's monitoring wells on an annual basis <br /> during the second quarter of each calendar year. <br /> 837 Shaw Road , Stockton, California 95215 <br /> Telephone (209) 467 - 1006 Fax ( 209 ) 467 -1118 <br />