Laserfiche WebLink
07/19/96 FRI 10 42 FAX 583 3282 - — ULTRAHAR HORIZON SAC 005 <br /> Kk ur as rvx`i vauKJ~ 2 Z MARCH 1994 <br /> CLOSURE DOCUMENTATION <br /> The minimum information required in the closure report includes: <br /> 1. Distance to production wells for municipal, domestic, agriculture, <br /> industry and other uses within 2000 feet of the site, <br /> 2. Site reaps, to scale, of area impacted showing locations of former <br /> and gusting 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 /> S. Vertical and lateral concentration contours of contanvriants found <br /> initially, and those remaining in soil and ground water, both on <br /> and off site, <br /> b Mass balance calculation of the substance treated versus that <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 /> r—� Additional information submitted, such as risk assessments or fate and transport <br /> modeling, must include the assumptions used. <br /> Upon review, if Board staff determines that the Closure Report substantiates the <br /> request for closure, the remedial and monitoring activities may cease Upon <br /> concurring with the closure request, Board staff will prepare a letter which <br /> summarizes the site conditions and includes the foIlowing- <br /> "Based on the information provided, Board staff has determined (and <br /> the Local Implementing Agency concurs,r that appropnate response <br /> actions have been completed, that acceptable remedial practices were ` <br /> implemented, and that, at this time, no further investigation, remedial <br /> or removal action, or monitoring is required at [FaciIify name and , <br /> address] <br /> 5 d h0d-d Kv'ZE= l l 9661--6 t-L <br />