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ig �11'6ETTLER - RYAN INC. ti <br /> 0C + k " P'° 12: 04 <br /> October 12, 1998 <br /> Ms. Carol Oz <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95201-0388 <br /> RE: Work Plan Addendum,Tosco 76 Branded Facility No. 11193,3202 West Hammer Lane, Stockton, <br /> California <br /> Ms. Oz:_ <br /> At the request of Tosco Marketing Company (Tosco), Gettler-Ryan Inc. (GR)has prepared this Addendum to our <br /> Work Plan For Soil Sampling Following Product Piping Removal, dated August 21, 1998 (work plan). In addition <br /> to upgrading the existing product piping,as outlined in the referenced work plan, Tosco will also remove and replace <br /> the existing gasoline underground storage tanks(USTs) at the site. <br /> In addition to proposed sampling outlined in the work plan, GR will observe the removal of the USTs and collect <br /> compliance samples from the UST excavation in accordance with San Joaquin County Public Health Services <br /> (SJCPHS) guidelines. UST locations or shown on Figure 2 of the work plan. Compliance soil samples will be <br /> collected from the base of the excavation at both ends of each tank. If groundwater is encountered in the UST <br /> excavation,a grab groundwater sample will be collected and soil samples will be collected from the sidewalls above <br /> groundwater. Soil and groundwater samples will be collected, handled, and analyzed using the methods outlined in <br /> the work plan. <br /> If either subjective field evidence or analytical data indicate soil beneath the site has been impacted by hydrocarbons, <br /> Tosco may elect to excavate the impacted soil. GR will observe the excavation activities. Confirmation samples will <br /> be collected from the lateral limits of the excavation and analyses performed in accordance with SJCPHS guidelines. <br /> Excavated soil and backfill material will be stockpiled at the site pending characterization and disposal per the methods <br /> outlined in the work plan. <br /> Upon completion of all environmental activities associated with the UST and product piping removal, and receipt of <br /> all data, GR will prepare a report documenting the sampling activities and analytical results. This report will be <br /> prepared for Tosco's use and distribution. <br /> If you have any questions regarding this work plan addendum, please do not hesitate to call me at(925)551-7555. <br /> Sincerely, <br /> Gettler-Ryan, Inc. <br /> %DougglLee <br /> Project Manager <br /> cc: David J. Camille, Tosco Marketing Company <br /> iao�ns.okz <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />