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REQUESTS FOR CLOSURE 2 t ' 1 MARCH 1994 <br /> CLOSURE DOCUMENTATION/ <br /> The minimum information required in the closure report includes: j <br /> 1. Distance to production wells for municipal, domestic, agriculture, <br /> industry and other uses within 2000 feet of the site, ". <br /> 2. Site maps, to scale, of area impacted showing locations of former <br /> and existing tank systems, elevation contours, gradients, and <br /> nearby surface waters, buildings, streets, and subsurface utilities, <br /> 3. High and low ground water levels (below ground surface), <br /> 4. Tabulated results of all sampling and analyses, <br /> i <br /> 5. Vertical and lateral concentration contours of contaminants found <br /> initially, and those remaining in soil and ground water, both on <br /> and off site, <br /> i <br /> 6. Mass balance calculation of the substance treated versus that j <br /> remaining, <br /> 7. Technology used to clean the site; if Best Available Technology <br /> (BAT) was not used, explain why, <br /> 8. Zone of influence calculated for the subsurface remediation system <br /> and the zone of capture attained for the soil and ground water <br /> remediation system, <br /> 9. Reasons why "background" was/is unattainable using BAT, and <br /> 10. Rationale why conditions remaining at the site will not adversely <br /> impact water quality, health, or other beneficial uses. <br /> Additional information submitted, such as risk assessments or fate and transport <br /> modeling, must include the assumptions used. <br /> - _ oA� <br /> From L <br /> a P (Oak DmLtofi/dTJ I ovd 50C <br /> t <br /> i <br /> i <br />