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is 4 ISr_ _ K•s��s _ .�' �A. _;'�+�fi� � s _ -a <br /> PRE-TJNK REPLACEMENT Site Assessamnt Results <br /> 420 WLST KETTLEMAN LANE,L001, CA. <br /> Aegis Project No, 89.013 <br /> Page 10 <br /> 6.0 RECCMNIEY )ATION6 <br /> The following presents Aegis' recommendations rec.a::ding the planned <br /> tank closure/replacement at the site: <br /> 1) Due to the short time frame required to complete the planned <br /> improvements, it is :recommended a'mihimal:.amount', of....oil- <br /> containing petroleum hydrocarbons be excavated-.;frons the <br /> existing :tank basin, because of SJCHD limitations on: <br /> excavating during a tank closure. Preliminarily, any <br /> contaminated soils left in place may be suitable for vapor <br /> - extraction technologies. <br /> 2) Remove _sails.,from .the Northwest: corner of-,the :Pr'opased: new' <br /> tarb,-,iocation which contain petroleum hydrocarbons. Posi4ion <br /> the location of the new underground tanks 10 ft, to 15 ft. <br /> south of the proposed location. .Contaminatfon, observed: fn <br /> ,t the.northwest .corner ,or the -proposed new tank­14 cation ;-, <br /> -- dIssapates; in a .southerly:direction.;.Samples should be .taken <br /> from the new tank excavation �to <br /> excavation is "clean", confirm the:bott)m of the <br /> 'h 3) Disposal of excavated soils containing petroleum <br /> hydro.:arbons. at a Class II landfi�ll ' '(either Forward, Inc. or <br /> Amador: Cou�tty landfill) , is the most cost effective, <br /> r expedient method to manage soils generated during the tank_ <br /> cl0sure, provided the generation of ,soils containing <br /> pet oleum hydrocarbons during the tank cl-'sure is kept :o a <br /> min].ilium <br /> 4) An Aegis representative should be onsite during the tank <br /> closure to obtain samples beneath the existing underground <br /> �1. storage tanks per SJCHD requirements, and screen, segregate, <br /> .� sample and manage soils removed from the existing tank <br /> basin. , <br /> � } r <br /> 5) At the completion of the tank closure/replacement, submit a <br /> tank closure rF .. <br /> :port o the-,SJCHD which conforms to the <br /> " ( guidelines outlined in "Regional Board Staff Recommendations <br /> j for Initial Evaluation and Investigation of Underground <br /> I Tanks" (CVRWQCB, NCRWQCB, SFBRWQCB June 1986) and the <br /> "Luft Manual" (State of CA Leaking Underground Fuel Tank <br /> n. Task Force, May. 1988) . <br /> r� <br /> t � ! f <br />