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APPEND X B OF THE TRI-REGIONAL RECON 1T NDATIONS <br /> ___CHECKLIST,_OF-REQUIRED_DATA.FOR-CLOSURK OF-.UNDERGROUND-TANK-SITES <br /> CLOSURE DOCUMENT APPLICATION <br /> 1. Distance to production wells for municipal, domestic, agriculture, industry and other uses within <br /> 2000 feet of the site; <br /> 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 /> 3. Figures depicting lithology (cross section), treatment system diagrams; <br /> 4. Stockpiled soil remaining on-site or off-site disposal (quantity); <br /> 5. Monitoring wells remaining on-site, fate; <br /> 6. Tabulated data of all ground water elevations and depths to water; <br /> 7. Tabulated results of all sampling and analyses: <br /> Detection limits for confirmation sampling <br /> _ --------------Lead analyses-— ---- - ----- <br /> 8. Concentration contours of contaminants found and those remaining in soil and ground water, both <br /> on- and off-site: <br /> Lateral extent of soil contamination <br /> Vertical extent of soil contamination <br /> Lateral extent of ground water contamination <br /> Vertical extent of groundwater contamination-- - <br /> 9. Zone of influence calculated and assumptions used for the subsurface remediation system and the <br /> zone of capture attained for the soil and ground water remediation system; <br /> 10. Reports/information missing from file <br /> Unauthorized Release Form (URF) <br /> QMRs (Dates) <br /> PAR <br /> FRP <br /> Other (report name) <br /> Well and boring logs <br /> 11. Best Available Technology (BAT) used or an explanation for not using BAT; <br /> 12. Reasons why "background" was/is unattainable using BAT; <br /> 13. Mass balance calculation of the substance treated versus that remaining,-- <br /> 14. — <br /> emaining,14. Assumptions, parameters, calculations and model used in risk assessments, and fate and transport <br /> modeling; - - -- --- <br /> 15. Rationale why conditions remaining at the site will not adversely impact water quality, health, or <br /> other beneficial uses; and <br /> 16. WET or TCLP results <br /> Comments: <br />