Laserfiche WebLink
TAG 1 -CHECKLIST OF REQUiREDOTA <br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SiTES <br /> Site Name and Location: Corral Hollow Sanitary Landfill,Corral Hollow Road/1-580,Tracy, San Joaquin County <br /> NA 1 1. Distance to production wells for municipal, domestic, agriculture,industry and <br /> other uses within 2000 feet of the site; <br /> a2 Cita'maps to scale. of area impacted showing locations of formes and existing tank systems. 1,600-gallon diesel tank <br /> excavation contours and sample locations. boring and monitoring well elevation contours, removed 2/96 <br /> gradients, and nearby surface waters, ibu ldingl. streets, and subsurface utilities; <br /> 0 3. Figures depicting/ithokigy(cross section), treatment system diagrams; <br /> Q 4. Stockpiled soil remaining on-site or off-site disposal(quantity): 200 cu yd stockpiled soil aerated to 60 mg/kg TPH-d,and <br /> used to backfill the tank pit <br /> 0 5. Monitoring wells remaining on-site, fate; <br /> FY-1 6. Tabulated results of ad groundwater elevations and depths to water, 68 to 75 ft bgs <br /> a7.Tabulated results of all sampling and analyses: Contaminated soil excavated to 23 ft bgs Confirmatory soil samples <br /> N Detection limits for confirmation sampling ND for petroleum contaminants including MTBE <br /> aN Lead analyses <br /> Y ] 8. Concentration contours of contaminants found and those remaining in soil Limited to excavated soil <br /> and groundwater, and both on-site and off-site: <br /> y Lateral andRN <br /> Vertical extent of soil contamination <br /> N Lateral and Vertical extent of groundwater contamination <br /> 0 9. Zone of influence calculated and assumptions used for subsurface <br /> remediation system and the zone of capture attained for the soil and <br /> groundwater remediation system, <br /> 0 10.Reports/information a Unauthorized Release Form 4/15/96 o QMRs(Dates) <br /> Q Well and boring logs 0 PAR a FRP o Other(report name) Diesel Tank Removal 1116197 <br /> FY-1 11.Best Available Technology(BAT)used or an explanation for not using BAT; Removed tank and excavated to NO 23 ft <br /> bgs <br /> NA 12.Reasons why background wads unattainable using BAT,' <br /> FNA <br /> NA 13.Mass balance calculation of substance treated versus that remaining; <br /> FNA <br /> NA 14.Assumptions,parameters, calculations and model used in risk <br /> assessments, and fate and transport modeling; <br /> 0 15.Rationale why conditions remaining at site will not adversely Petroleum contamination was removed from this site and <br /> impact water quality, health,or other beneficial uses;and replaced with backfill having 60 mg/kg TPH-d. This <br /> concentration is too low to impact water quality. <br /> NA 16.WET or TCLP results <br /> BComments.San Joaquin County has determined that no further site investigation or remedial action <br /> P4is required at this site, and Board staff concur. Only 60 mg/kg TPH-d remained in the stockpiled <br /> Dat . soil that was used at backfill in the tank pit. The original contamination was excavated to ND. <br />