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TAIL 1 - CHECKLIST OF REQUiRED-wATA <br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES <br /> Site Name and Location: Fire Station #l9, 550 E Harding Way, Stockton, San Joaquin County <br /> N 1 1.Distance to production wells for municipal, domestic, agriculture, industry <br /> Has not been determined. <br /> and other uses within 2000 feet of the site; <br /> No monitoring wells were <br /> N 2. Site maps, to scale, of area impacted showing locations of former and existing tank systems, installed. Groundwater <br /> excavation contours and sample locations, boring and monitoring well elevation contours, gradient and flow direction <br /> gradients, and nearby surface waters, buildings, streets, and subsurface utilities; have not been determined. <br /> FY 3. Figures depicting lithology(cross section), treatment system diagrams; Boring logs for 3 drive direct-push borings <br /> near the tank pit were provided. <br /> NA 4. Stockpiled soil remaining on-site or off-site disposal(quantity); <br /> Unknown <br /> NA 5. Monitoring wells remaining on-site, fate; No monitoring well were installed on-site. <br /> NA 6. Tabulated results of all groundwater elevations and depths to water, <br /> Ya 7.Tabulated results of all sampling and analyses: All sampling results are presented in a tabular format. Elevated <br /> 0 Detection limits for confirmation sampling detection limits were present for TPHd for several samples. <br /> aLead analyses <br /> 8. Concentration contours of contaminants found and those remaining in soil The vertical and lateral extent of soil and <br /> and groundwater, and both on-site and off-site: groundwater contamination have not been <br /> nLateral and [N] Vertical extent of soil contamination adequately characterized. <br /> 0 Lateral and H 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 /> 0 10.Reports/information a Unauthorized Release Form a QMRs(Dates) <br /> El Welland boring logs Q PAR N] FRP 0 Other(report name) Site Characterization, dated 18 July 97 <br /> N� 11.Best Available Technology(BAT) used or an explanation for not using BAT, <br /> NA 12.Reasons why background was/is unattainable using BAT; <br /> EEI13.Mass balance calculation of substance treated versus that remaining; No Mass balance calculation was performed. <br /> NA 14.Assumptions, parameters, calculations and model used in risk <br /> assessments, and fate and transport modeling; <br /> a15.Rationale why conditions remaining at site will not adversely Leaching Potential Analysis for Gasoline and Diesel <br /> impact water quality, health, or other beneficial uses; and (from LUFT) was used to evaluate potential impact to <br /> groundwater. Conclusions are contradicted by sample. <br /> NA 16.WET or TCLP results <br /> By:M�f Comments: The site has not been adequately characterized. On 23 December 1996, groundwater was <br /> encountered at approx. 48'bgs. A groundwater sample collected from a temporary well contained 410 ug/L <br /> Date. TPHd and 0.7 Ng/L toluene. It appears that contamination has migrated vertically and impacted <br /> alt CRg groundwater. No contaminant mass has been calculated and the contaminant distribution is unknown. <br />