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p - <br /> 1 <br /> N'EISs ASSGK'IAaS <br /> Julian Munoz 3 <br /> 13 November 1987 <br /> exceed <br /> Since TFHC concentrations in tlsese samples u11i[orGontrolnia g,Bcaa' nt <br /> Board of ijealth Services (MIS) and California Regional Water Quality <br /> standards for allowing; the backfill material to <br /> Central Valley Region (WQCB) <br /> remain in place untreated, the San Joaquin Local Health District (SJlt[D1 has <br /> requested that the pea gavel be removed from the excavaLiotl and disposed of <br /> properly. <br /> t a Class I facility would be logistically <br /> osc complicated and <br /> `a of dn�e <br /> Disposal a ; <br /> not eliminate potential liability. Therefore, we P re <br /> backfill material and aeration onsite. This will reduce the TTle7deot overan <br /> the backfill material to a levet that will allow it to be p <br /> t the rear of the Safeway facility. This approach was discussed <br /> unpaved area a <br /> Will <br /> with Steven Boll and David Brent of the VQCB and with William tadlwertae quality <br /> 5JLIID and they concur that this conforms with existing <br /> guidelines. <br /> As discussed in our report on Phase II: Monitoring Well Installation, <br /> ank excavation <br /> dated l5 October 1987, samples of native soil from beneath the t <br /> x. <br /> removal of the bac};fill material. <br /> will be collected during GC/FID <br /> the remo <br /> analyses of these samples will indicate whether hydrocarbons are present in <br /> soil beneath the tank excavation and the potential. for hydrocarbons in ground <br /> water beneath the site. <br /> I <br /> WA's scope of work for this program consists of the full-owing three tas :s; <br /> Task I - Coordinating and supervising construct ion f lined <br /> of lrnenclosur( , <br /> excavation of the backfill and sp1'e P <br /> backfill <br /> material onto the liner and; collecting eight composite samples <br /> and <br /> of the aerating backfill material, analyzing the samples <br /> preparing a brief letter report; <br /> etnc! <br /> Task 2 - Collecting six composite soil samples from <br /> r msoil <br /> samptesand; <br /> adjacent to the tank excavation «nd snakyZg Ch <br />