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Advanced <br /> GeoEnvironmenta , ac, m ,: 3 0. ' <br /> 20 May 2004 <br /> AGE-NC Project No. 02-0886 <br /> Ms. Vicki McCartney <br /> San Joaquin County Environmental Health Department <br /> 343 East Weber, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Addendum to Revised Monitor ng Well Installation Work PI.-.n <br /> Former BLUE STAR GASOLINE <br /> 4040 East Main Street, Stockton, California <br /> Dear Ms. McCartney: <br /> At the request of Mr. Khalid Anber,property owner,Advanced GeoEnvironmental,Inc. (AGE)has <br /> prepared this Addendum to Revised Monitoring Well Installation Work Plan for the property located <br /> at 4040 East Main Street, Stockton, California. This addendum addresses concerns and comments <br /> in the San Joaquin County Environmental Health Department(SJCEHD)letter dated 15 April 2004, <br /> regarding the specific scope of work presented in the Work Plan. <br /> The following comments are submitted for your consideration: <br /> • AGE will install all three proposed monitoring wells during a single mobilization. <br /> • One monitoring well pilot boring, near the former underground storage tank area, will be <br /> continuously cored for lithological evaluation. <br /> • Laboratory results shall include all quality assurance/quality control (QZ/QC) paramaters, <br /> as appropriate and typical fo:T?S'r inc tigation sites. <br /> • Standard reporting limits for 1,2-DCA and EDB shall be 0.5 micrograms per liter, unless <br /> interference is encountered from other constituents (which could results in increased <br /> reporting limits in selected samples). <br /> • As indicated in the Work Plan, a site specific health and safety plan will be provided to the <br /> SJCEHD prior to field activities. <br /> 837 Shaw Road,Stockton,California 95215 <br /> Telephone(209)467-1006 FAX(209)467-1118 <br />