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Advanced <br /> GeoEnvironmental, Inc . - - <br /> 14 March 2008 <br /> UL' I C-1;t L <br /> AGE-NC Project No. 99-0592 <br /> A R 3 0 ZGG8 <br /> ENViR0M,11:N i HEALTH <br /> Ms. Vicki McCartney PER N1;T/SERVICES <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street <br /> Stockton, California 95202 <br /> Subject: Additional Site Assessment Addendum <br /> MOORE TRUCK LINES <br /> 3400 Newton Road, Stockton, California <br /> Dear Ms. McCartney: <br /> At the request of Mrs.Edna Moore of Moore Truck Lines,Advanced GeoEnvironmental,Inc.(AGE) <br /> has prepared this Additional Site Assessment Addendum for 3400 Newton Road, Stockton, <br /> California. This addendum proposes to modify the scope of work of the original AGE-prepared <br /> Additional Site Assessment and Aquifer Pump Test Work Plan, dated 04 December 2007. <br /> In the original scope of work,AGE proposed to ad additional ground water monitoring <br /> wells (M)Y-5, MW-6, MW-7) to depths betwee ��ylg8eelow surface grade (bsg) and one well <br /> (MW-8) tfo 80 feet bsg. Proposed monitoring wells MW-5 through MW-7 were to be screened <br /> between 55 feet bsg and 7feet bsg; well MW-8 was to be screened between 60 and 80 feet bsg. <br /> 7g <br /> AGE proposed the deeper-screen interval for well MW-8 to maximize the ability of any future <br /> ground water extraction remediation feasibility testing or remediation, acknowledging the current <br /> 60 feet below surface grade (bsg) ground water depth. AGE proposed this screen interval for the <br /> monitoring wells to be consistent with existing well screen intervals of 75 feet bsk for well MW-2 <br /> through MW-4. — f <br /> Pi All <br /> As directed by the San Joaquin County Environmental Health Department (EHD) letter dated 10 <br /> January 2008 (Appendix A), AGE proposes the following modifications to the work plan: <br /> • The total depth for proposed well MW-�will be 70 feet bsg, screened between 60 feet and t 1 <br /> 70 feet bsg,to prevent shallow soil contamination migrating into the well.Well MW-8 will <br /> be advanced to a depth of 70 feet bsg and screened between 60 feet and 70 feet bsg,to prevent { <br /> shallow soil contamination from migrating into the well.) <br /> 837 Shaw Road, Stockton,California 95215 <br /> Telephone (209) 467-1006 Fax(209)467-1118 <br />