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i w <br /> TABLE 1 - CHECKLIST OF REQUIRED DATA <br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES <br /> Site Name and Location: The Pep Boys 3711,4907(4987)West Lane,Stockton, San Joaquin County <br /> NA 1. Distance to production wells for municipal, domestic, agriculture, industry <br /> and other uses within 2000 feet of the site; <br /> 0 2. Site maps to scale of area impacted showing locations of former and existing_tank systems. 500-gallon waste oil tank <br /> excavation contours and sample locationsboring and monitoring well elevation contours, closed 10118196 <br /> gradients, and nearby surface waters, buildings. streets, and subsurface utilities, <br /> a3. Figures depicting lithology(cross section), treatment system diagrams; 3 borings 65 ft bgs and 1 boring 45 ft bgs <br /> Q4. Stockpiled soil remaining on-site or off-site disposal(quantity); 12 drums disposed off-site excavated 7 ft bgs, <br /> excavated 7 ft bgs 10 cu yds returned to pit <br /> 0 5. Monitoring wells remaining on-site, fate; <br /> Q6. Tabulated results of all groundwater elevations and depths to water, 59.6 and approximately 65 ft bgs boring gw levels <br /> San Joaquin Co Flood Control Map 45 to 75 ft bgs <br /> 0 7.Tabulated results of all sampling and analyses: Contamination beneath tank and drain: 3.3 mg/kg TPH-g,20µg/kg,250 <br /> a Detection limits for confirmation sampling µg/kg, 66µg/kg,and 440 gg/kg BTEX, 10 mg/kg TPH-d, 9 mg1kg Pb,42 <br /> mg/kg Zn,48 mg/kg Cr,42 mg/kg Ni <br /> ay Lead analyses <br /> YD 8. Concentration contours of contaminants found and those remaining in soil Soil contamination: near tank to SB-4(15 <br /> and groundwater, and both on-site and off-site: ft) extends vertically 35 ft bgs to clay layer <br /> NY <br /> Lateral and yyVertical extent of soil contamination GW low concentration for petroleum <br /> contaminants <br /> Lateral and �y Vertical extent of groundwater contamination <br /> FNA] 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 /> Q 10.Reports/information ay Unauthorized Release Form 11112196 ❑N QMRs(Dates) <br /> 0 Well and boring logs a PAR Subsurface Investigation 11110197 ❑N Other(report name) <br /> y❑ 11.Best Available Technology(BAT)used or an explanation for not using BAT,' Removed tanks and excavated soil <br /> 0 12.Reasons why background wasris unattainable using BAT; Low concentrations at depth <br /> NA <br /> -1 13.Mass balance calculation of substance treated versus that remaining; <br /> NA 14.Assumptions,parameters, calculations and model used in risk' <br /> assessments, and fate and transport modeling; <br /> 15.Rationale why conditions remaining at site will not adversely Soil contamination limited in extent and concentration <br /> impact water quality, health, or other beneficial uses;and GW contamination limited in extent and low <br /> concentration <br /> NA 16.WET or TCLP results <br /> By: Comments: Remaining soil contamination: 40 mg/kg Cr, 14 mg/kg Pb, 38 mg/kg Ni, and 140 mg/kg <br /> f Zn. Ground water contamination 220µg/1 TPH-g, 0.7µg/I benzene, 0.1 mg11 Zn <br /> D'a <br />