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TA6=E 1 - CHECKLIST OF REQUIRED k�,ATA <br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES <br /> Site Name and Location: Rossetti's Market,25411 Lone Tree Road, Escalon,San Joaquin County <br /> N� 1. Distance to production wells for municipal, domestic, agriculture, industry There is no evidence of groundwater <br /> and other uses within 2000 feet of the site; contamination,and SJCEHD did not <br /> believe a well survey warranted. <br /> YD 2. Site maps, to scale, of area impacted showing locations of former and existing tank systems, 3 UST excavations,5 soil <br /> excavation contours and sample locations, boring and monitoring well elevation contours, borings advanced in the <br /> gradients, and nearby surface waters, buildings, streets,and subsurface utilities; area of the Impacted UST <br /> excavation. <br /> EYD3. Figures depicting lithology cross section), system diagrams; Borings logs:Sand to 14'and silt to 35, <br /> site covered by asphalt. <br /> N <br /> 4. Stockpiled soil remaining on-site or off-site disposal(quantity); WA <br /> 5. Monitoring wells remaining on-site, fate; Groundwater was not encountered to 35 feet bgs In soil borings. No <br /> N monitoring wells were installed. <br /> 06. Tabulated results of all groundwater elevations and depths to water; WA <br /> 7. Tabulated results of all sampling and analyses: Initial soil sample results from UST excavation at time of tank pull: <br /> 2040 ppm TPHg,benzene 0.073 ppm. Sampling during soil boring <br /> FYIDetection limits for confirmation sampling program: 4.8 ppm TPHg,benzene 0.017 ppm,All oxygenates were ND <br /> ❑N Lead analyses by EPA Method 8260. <br /> 8. Concentration contours of contaminants found and those remaining in soil The lateral and vertical extent of soil <br /> groundwater, and bot site and off-site: contamination has been determined. The <br /> Lateral and �Vertical extent of soil contamination only soil impact is near the former UST <br /> excavation.No groundwater contamination <br /> ❑N Lateral and N❑ Vertical extent of groundwater contamination has been observed. <br /> 9.Zone of influence calculated and assumptions used for subsurface WA <br /> remediation system and the zone of capture attained for the soil and <br /> groundwater remediation system; <br /> 0 10.Reports/information El Unauthorized Release Form NJ OMRs(Dates) <br /> 0 Well and boring logs 0 PAR 0 FRP R Other(report name)Summary Rpt of Subsurface Invest. <br /> 0 11.Best Available Technology(BAT)used or an explanation for not using BAT- N/A <br /> 1 � 1 12.Reasons wily background was/is unattainable using BAT; WA <br /> 0 13.Mass balance calculation of substance treated versus that remaining; Mass calculation was not completed. <br /> 0 14.Assumptions,parameters, calculations and model used in risk WA <br /> assessments, and fate and transport modeling; <br /> FYD 15.Rationale why conditions remaining at site will not adversely Low conc.soil impact limited to within 10-15 feet of the <br /> impact water quality, health, or other beneficial uses;and UST excavation,highest concentrations encountered <br /> between 10 and 15 feet bgs. <br /> 16.WET or TCLP results <br /> By: `�_ Comments:Low concentrations of TPHg and BTEX, were present in soil samples collected from the UST excavation <br /> in 1987. The 1998 soil investigation detected low conc of TPHg and BTEX, in two soil borings loc. next to the UST <br /> Date:/G excavation. Groundwater was not encountered in the soil boring to 35'bgs,and no evidence of a potential <br /> v <br /> groundwater impact is evident. This site poses little threat to water quality, and closure concurrence appears <br />