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Advanced <br /> r GeoEnvironmental, Inc. _ = <br /> 16 September 2002 <br /> AGE-NC Project No 99-0559 <br /> Mr Harlin Knoll <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third floor <br /> Stockton, California 95202 Q+ "r=� <br /> Sub,l ect. Interim Remediation Work Plan - Addendum <br /> WATERLOO FOOD AND FUEL <br /> 3032 East Waterloo Road, Stockton, California <br /> Deal Mr Knoll <br /> At the request of Mi Paul Sidhu of Waterloo Food and Fuel, Advanced GeoEnviionmentaI, Inc <br /> (AGE) has pt epai ed this addendum to the apps owed.Interim Remediation And Site Assessrneni Woa k <br /> Plena, dated 25 January 2001 The original woik plan detailed procedures for the initiation of a <br /> shallow ground water extraction, ti eatment and disposal system as an interim remediation measui e <br /> to i educe the offsite magi ation of pets oleum hydrocarbons and the fuel additive MTBE from the site <br /> located at 3032 East Waterloo Road, Stockton, California The original plan proposed to utilize the <br /> four shallow on-site ground water monitoring wells, established to a depth of apps oximately 65 feet <br /> below surface grade (bsg), as the extt action wells However, the can ent gi ound water level has <br /> decreased to 62 feet bsg, the amount of water in the shallow wells are insufficient to allow for <br /> exti action of the upper water table, whet e the highest concentrations of dissolved hydrocarbons are <br /> present <br /> AGE pi oposes to install four new, 4-inch extraction wells to a total depth of 80 feet bsg The wells <br /> will be screened fiom 60 feet to 80 feet bsg to allow fol adequate water production over the <br /> remediation period The well locations and depths ate depicted on Figures 2 and 3 The procedures <br /> for soil pilot borings and well completions wei e included in the initially approved work plan <br /> The alternative choice would be to postpone implementation of the approved i errtediation until at <br /> which time sufficient groundwater is present in the shallow wells at the site <br /> rl <br /> 837 Shaw Road, Stockton, California 95215 <br /> Telephone (209) 467-1006 FAX(209) 467-1118 <br />