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Advanced <br /> GeoEnvironmental, Inc. --o- <br /> 02 June 1999 <br /> AGE-NC Project No. 98-0533 <br /> JUN 0 31999 <br /> E�N%IgC)1441ViEl47i,L hEA1,.TN <br /> Ms. KaseyQFoley pE,�1br1T S <br /> SAN JOA UIN COUNTY PHS-EHD /SER'viCE <br /> 304 East Weber Avenue <br /> Stockton, CA 95202 <br /> Subject: Work Plan Addendum Letter <br /> LODI AIRPORT <br /> 23987 North Highway 99, Acampo, California <br /> Dear Ms. Foley: <br /> A Work Plan(dated 21 December 1998)was previously submitted to the San Joaquin County Public <br /> Health Services-Environmental Health Division(PHS-EHD)for the advancement of five soil probe <br /> borings for the evaluation of the subsurface beneath the USTs and for the abandonment of three <br /> USTs. However, per our phone conversation (28 May 1999), Advanced GeoEnvironmental, Inc. <br /> (AGE)proposes the following revisions to the work plan: <br /> • Removal of dispenser island/associated piping and sampling will be performed first. <br /> PHS-EHD personnel will be onsite for removal procedures. <br /> • One additional soil probe boring advanced for the investigative evaluation of the subsurface <br /> beneath the USTs. <br /> • The application of 30 pounds of dry ice per 1,000-gallon capacity of USTs. <br /> • Based on information obtained by AGE verifying that Avgas contains lead, an additional <br /> analysis will be performed for Total Lead for selected samples. <br /> • AGE is in the process of attaining a permit from San Joaquin County Fire Prevention for the <br /> USTs. <br /> 4005 North Wilson Way, Stockton, California 95205 <br /> Telephone (209)467-1006 FAX (209)467-1118 <br />