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Advanced <br /> GeoEnvironmental, Inc . - <br /> 05 September 2008 <br /> AGE-NC Project No. 02-0950 INIEC�LJjj�� I�I� <br /> U�U <br /> Ms. Margaret Lagorio - San Joaquin County EHD <br /> 600 East Main Street SEP 0 3 2008 <br /> Stockton, California 95202 <br /> ENVIRONMENT HEALTH <br /> Subject: Quarterly Monitoring Sampling Reduction PERMIT/SERVICES <br /> MASONITE-former Prem Dor <br /> 433 West Scotts Avenue, Stockton, California <br /> Dear Ms. Lagorio: <br /> On behalf of Masonite International,Inc., Advanced GeoEnvironmental,Inc.requests to reduce the <br /> sampling frequency and analysis for specified wells in order to reduce costs at the facility located <br /> at 433 West Scotts Avenue, Stockton, California(site). AGE proposes the following: <br /> • Reduction of sampling frequency for wells MW-1,MW-3,MW-4 and MW-5 from quarterly <br /> to annual. These wells have consistently been reported at non-detect levels for all analytes <br /> during the past eight quarterly monitoring events. <br /> • Continued quarterly monitoring for wells MW-2, MW-6 and MW-7. However, AGE <br /> proposes to reduce sampling frequency from quarterly to annual for MW-6, if results show <br /> non-detect levels during the next three quarters. <br /> • Removal of analysis for total petroleum hydrocarbons quantified as diesel (TPH-d) for all <br /> wells except MW-2; TPH-d has only been reported in samples collected from MW-2. <br /> • Removal of analysis for TPH-d for MW-2, if analytical results continue to report non-detect <br /> levels through the Third Quarter 2008. TPH-d has not been reported in samples collected <br /> from MW-2 since the Third Quarter 2007. <br /> All wells will continued to be measured quarterly for depth to water. If you have any questions or <br /> comments,please contact our office at(209) 467-1006. <br /> Sincerely, <br /> Advanced GeoEnvironmental, Inc. <br /> Ad�� - <br /> Shawn K. Agarwal <br /> Staff Geologist <br /> cc: Mr. Tom Crawshaw, Masonite International, Inc. <br /> 837 Shaw Road; Stockton,California 95215 <br /> Telephone (209)467-1006 Fax (209)467-1118 <br />