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Advanced <br /> GeoEnvironmental , Inc. <br /> 18 July 2002 <br /> AGE-NC Project No. 02-0926 <br /> Ms. Margaret Lagorio <br /> SAN JOAQUIN COUNTY ENVIRONMENTAL HEALTH DEPARTMENT <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, CA 95202 <br /> Subject: Revised Work Plan Addendum-July 2002 <br /> OCAMPO PROPERTY (Former Electro Delta) <br /> 821 South Wilson Way, Stockton, California <br /> Dear Ms. Lagorio: <br /> At the request of Mr.Alfonso Ocampo,Advanced GeoEnvironmental,Inc.(AGE)has prepared this <br /> Revised Work Plan Addendum for additional assessment activities at 821 South Wilson Way, <br /> Stockton California.The additional scope of work includes a minor modification in the locations of <br /> monitoring wells and soil borings proposed in the original work plan addendum, and advancement <br /> of a soil boring near each of the three in-ground sumps to collect soil samples for laboratory analysis. <br /> BACKGROUND <br /> It is our understanding that a single 550-gallon underground storage tank(UST)was removed from <br /> the site in 1985. A soil sample collected from the former UST location indicated that high <br /> concentrations of lead were present in the soil. A soil boring was advanced at the site in 1998; <br /> petroleum hydrocarbons were detected in soil samples collected from the boring. A work plan <br /> addendum and revised addendum were prepared for the site in 1999 to advance four soil borings and <br /> install three ground water monitoring wells at the site; the revised addendum was approved by the <br /> San Joaquin County Environmental Health Department (EHD) by correspondence dated 19 May <br /> 1999.The following scope of work is based upon the previously-approved work plan addendum and <br /> revised work plan addendum. <br /> SCOPE OF WORK <br /> AGE proposes to make the following revision and addition to the original Upgradient Environmental <br /> Consultants (UEC)-prepared Revised Addendum to Site Contamination Work Plan, dated 10 May <br /> 1999 and approved by the EHD by letter dated 19 May 1999: <br /> 837 Shaw Road,Stockton,California 95215 <br /> Telephone(209) 467-1006 FAX(209) 467-1118 <br />