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q_R-n Geological Techlucs Inc, 9 1172 Kansas Avenue Modesto,California 95351 (209)5224119/Fax(209)522-4227 www.etienv.cam September 16, 2011 Project No.: 507.2 Project Name: J.M. Equipment(W. Charter Way) Mr. Michael Infurna San Joaquin County Environmental Health Department 600 East Main Street Stockton CA 95202-3029 RE: Progress Report of Phase I Remedial Action Activities&Revised GWM Schedule Request for fiscal year 2011/2012 J.M. Equipment, 1245 W. Charter Way, Stockton, CA Dear Mr. Infuma: As requested by a telephone conversation on September 15, 2011, the purpose of this letter is to provide a brief summary to date of the Phase I implementation of the Remedial Action activities proposed in the Remediat Action Plan Addendum,dated May 27,2011 and to request a reduction in the ground water monitoring for this fiscal year. The following is a brief progress report: • GTI completed the installation of four injection wells (IW-1 through IW-4) and three observation wells(OW-1 through OW-3)on June 29, 2011. • During installation, the wells were surged and an initial development performed to insure drilling activities would not clog the wells with silt. • Each of the seven wells was surveyed on June 30, 2011 as required under AB-2886. • Observation wells OW-1 through OW-3 and injection well IW-4 were more thoroughly developed using mechanical surging,pumping and flushing methods on June 30, 2011. • The ORC socks were ordered and the 14 one foot sections of 6" ORC Advanced socks were assembled on September 7, 2011 and are ready for installation. • The air compressor and associated well head fittings were prepared and/or ordered on September 7, 2011. • GTI submitted the Notice of Intent (NOI) and associated Monitoring and Reporting Program(MRP)to the Regional Board on September 8,2011 for review and approval. • On September 8,2011,GTI personnel met with the client on-site to evaluate the proposed location of the air compressor and associated air supply lines. GTI personnel confirmed that the electrical and water utilities have been turned on.