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TABS 1 CHECKLIST OF REQUIREDOOTA <br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES <br /> Site Name and Location: Rental Equipment Company,Inc., 1825 E.Charter Way,Stockton,San Joaquin Co. <br /> 0 1.Distance to production wells for municipal, domestic, agriculture,industry Five domestic wells owned by Cal-Water <br /> and other uses within 2000 feet of the site; are located N of the site,and 6 dom wells <br /> are located S of the site wrn 2000 feet. <br /> Y❑ 2.Site maps, to scale, of area impacted showing locations of former and existing tank systems, <br /> excavation contours and sample locations,boring and monitoring well elevation contours, <br /> gradients,and nearby surface waters,buildings, streets, and subsurface utilities, <br /> 0 3. Figures depicting lithology(cross section), treatment system diagrams; Single DPT boring log is presented In the <br /> closure report.Log Reports clay to 50'bgs. <br /> N� 4. Stockpiled soil remaining on-site or off-site disposal(quantity); No treatment of soil or groundwater conducted or <br /> required by SJCEHD. <br /> aN 5.Monitoring wells remaining on-site, fate; No monitoring wells were installed at the site. <br /> FN 1 6. Tabulated results of all groundwater elevations and depths to water; NIA No groundwater data for this site. One grab <br /> groundwater sample collected from DPT boring. <br /> 0 7.Tabulated results of all sampling and analyses: The files reviewed at the SJCEHD contained all sampling results with <br /> y Detection limits for confirmation sampling the appropriate detection limits. <br /> N I Lead analyses <br /> 0 8. Concentration contours of contaminants found and those remaining in soil Soil contamination Is defined in the vertical <br /> and groundwater,and both on-site and off-site: and lateral directions by soll borings and <br /> Y Lateral and RN <br /> Vertical extent of soil contamination excavation sampling.No groundwater <br /> N Lateral and Vertical extent of groundwater contamination samples were collected at this site. <br /> FNA remediation <br /> Zone of influence calculated and assumptions used for subsurface <br /> FNA <br /> remediation system and the zone of capture attained for the soil and <br /> groundwater remediation system; <br /> a10.Reports/information ❑Y Unauthorized Release Form NJ OMRs(Dates) <br /> 0 Well and boring logs 0 PAR ❑N FRP ❑y Other(report name)Closure Report <br /> ETI 11.Best Available Technology(BAT)used or an explanation for not using BAT; SJCEHD determined contaminant <br /> concentrations In soil to be low risk. <br /> FNAJ 12.Reasons why background wasTis unattainable using BAT, <br /> 0 13.Mass balance calculation of substance treated versus that remaining, <br /> FNAJ 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 TPHd,E,and X impact only.Analytical results Indicate <br /> Y impact water quality, health, or other beneficial uses;and that the contamination is localized to the S end of UST <br /> excavation.Low conc. TPHd Impact to groundwater. <br /> NA 16.WET or TCLP results <br /> By.-"re_ Comments:All indications by SJCEHD are that the contamination at the site is located in the immediate area of the <br /> former UST excavation. The primary contaminant is TPHd, with minor ethylbenzene and xylenes. Low concentrations <br /> of TPHd have impacted groundwater below the site. This does appear to be a low risk site. Concurrence with the <br /> Date: <br /> 10/g1'�Y SJCEHD decision of no further action required appears warranted. <br />