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. . .A . <br /> TAE;I1 - CHECKLIST OF REQUIRELjATA <br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES <br /> Site Name and Location: Puller Mobile Home Park,:365 Louise Ave., Lathrop, San Joaquin Co. <br /> F .4 <br /> Y 1 `l.Distance to production wells for municipal, domestic, agriculture, industry No wells identified within 2000 feet of the <br /> and other uses within 2000 feet of the site; f T site. One on-site domestic well was <br /> destroyed ` <br /> 0 `2'. Site maps, to scale, of area impacted showing to cations of former and existing tank systems, See casefile <br /> excavation contours and sample locations, boring and monitoring well elevation contours, <br /> gradients, and nearby surface waters, buildings, streets, and subsurface utilities, F <br /> a3.Figures depicting lthology(cross section), treatmentsystem diagrams; Crass sections with contaminant <br /> concentrations,and borings logs were <br /> provided. <br /> ED 4. Stockpiled soil remaining on-site or off-site disposal(quantity); The original tank evcavation soil was returned to the <br /> 3 tank pit.An unknown quanity of soil was removed from <br /> the storm drain pond location and moved on-site. <br /> FY-1 7 roundwatermonitorin wells were installed on-site to determine the <br /> 5. Monitoring wells remaining on-site, fate; g g <br /> degree of groundwater contamination below the site. <br /> 6. Tabulated results of all groundwater ellevations and depths to water, This information was provided in each q.m.r.and <br /> + E the site closure summary. <br /> belated results of all sampling and analyses: <br /> See the Site Closure Summary for all sampling results and detection <br /> Detection limits for confirmation sampling E limits. <br /> Lead analyses i <br /> 8. Concentration contours of contaminants found and those remaining in soil Soil and groundwater contamination is <br /> FwW groundwater, and both-on-site and off-site: defined in the vertical and lateral directions <br /> Y from the soil borings and groundwater <br /> Lateral and Vertical extent of soil contamination <br /> i 'i monitoring well network. <br /> ❑Y Lateral and ❑Y Vertical extent of groundwater contamination <br /> NA 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 /> Q10.Reports/information El Unauthorized Release Form 0 QMRs(Dates) 2196-4197 <br /> ij <br /> El Well and boring logs 'PAR 0 FRP 0 Other(report name) Site Closure Summary, Phase!t Site Char <br /> NA <br /> 11.Best Available Technology(BAT)used or an explanation for not using BA T' t <br /> 12.Reasons why background wasris unatt�alinable using BAT; <br /> 3 <br /> 0 Y <br /> 13.Mass balance calculation of substancetreated versus that remaining; Approximately 37.6 gallons of TPHg&d <br /> ;. contamination remain in 1,150 cu yds of soil <br /> NA 14.Assumptions,parameters, calculations,'and model used in risk <br /> assessments, and fate and transport modeling,' <br /> 0 Y <br /> 15.Rationale why conditions remaining at site will not adversely Concentrations have decreased significantly over the <br /> Impact water quality, health, or other beneficial uses,'and past 5 years. This may be due in part to biodegradation F <br /> I ;I of the pertoleum constituents: <br /> NA ip <br /> 16.WET or TCLP results <br /> 0 <br /> gy. Comments: The remaining contamination does not appear to pose a significant threat to water quality. Site <br /> conditions appear to be appropriate for biodegradation of TPH to be occuring.An estimated 37.6 gallons of TPHd <br /> Date and TPHg remain in the subsurface. This contamination is present in an estimated 1,150 cubic yards of soil, centered <br /> g Z$ at 12.5 feet bgs near the former tank location. The soil is in contact with gw, but is no longer present in the mon wells. <br /> i <br />