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I <br /> October 22, 1997 <br /> 1 <br /> i <br /> Mr. Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 388 <br /> Stockton, California 95201 <br /> Re: Site Investigation Work Plan - Addendum <br /> Former Shell Service Station <br /> 1265 - 1267 Country Club Blvd <br /> Stockton, California <br /> Dear Mr Infurna <br /> This work plan addendum has been prepared by Enviros, Inc (Enviros) on behalf of Shell <br /> Oil Products Company in response San Joaquin County Public Health Services' (SJCPHS) <br /> request to provide additional information pertaining to construction of the ground water <br /> monitoring wells proposed in our October 1, 1997 Work Plan <br /> The proposed well construction is described on the attached Plate 1 Well screen will be <br /> placed approximately 10 feet above and 10 feet below first encountered ground water <br /> During previous site investigation activities performed in April 1997, ground water was <br /> encountered at depths ranging from 19 to 33 feet below grade (fbg), and stabilized at <br /> depths of 13 to 16 feet below grade Ground water will be allowed to stabilize in the well <br /> boring prior to placement of the well screen It is anticipated that stabilized ground water <br /> depths will be located approximately 20 fbg during upcoming investigation activities <br /> If you have any questions regarding the scope of work outlined in this work plan, please <br /> call <br /> Enviros, Inc , <br /> Diane M Lundquist, E <br /> Senior Engineer <br /> C46725 <br /> Attachments <br /> Plate 1 Proposed Monitoring Well Construction Detail <br /> cc Mr Tom Maher, Shell Oil Products Company <br /> Mr Alex Perez, Shell Oil Products Company <br /> Mr Phillip Metzger, Bank of the West <br /> Mr Lance Anderson, Miller, Starr, and Regalia <br /> • Ms Elizabeth Thayer, Regional Water Quality Control Board <br /> Cnvlros, Inc 270 Perkins Street Sonoma California Tel 707/935 4650 <br /> P 0 Sox 259 95476 0259 Fax 7071935 6649 <br />