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= _ �. <br /> "- ROMPmr <br /> Excavatin and Aeration of Contaminated Soils <br /> Excavation of contaminated spil at this site started"' <br /> September 15, 1987, : using a backhoe capable of reaching 7.8 feet <br /> deep. The east and west ends of the proposed area were benched <br /> down 10 feet tafacilitate <br /> Septemberv181O1987on e 38 £eet . deep. <br /> Excavation was completed on <br /> Clean top soil was first excavated and stovkpiled for reuse. <br /> SoiContaminated was <br /> sestockpiled forusiaeration- <br /> -g a ro QVA�128S Organic <br /> for contaminationa TPH reading of 50 PPM`was <br /> Vapor Analyzer. Any soil containing <br /> classified as contaminated. <br /> - The" final. excavated pit was approximately:.AV long x 25=; <br /> See Plate 1. Four future vent lines were <br /> wide k 38' deiBp• = were installed on the bottom <br /> install:ed. Vent lines No. lr 2' j it and were 4" well screen <br /> and across the 25' dimension of the p the .face of the south <br /> e. Vent No. 4 was installed <br /> pvc pipalong <br /> wall ip the Qit• st is 2" pvc well screen. . <br /> vent li as were _.Covered:',viith c1ea _ e3... graveland <br /> separated with - counlacted ':clay ':', Eac3i=veut` was.:.brought t } e <br /> surface in senarte filers for_future;use. <br /> T At the completion of this work, the hole was backfilled with <br /> uncontaminated soil to about 20 feet below the original surface. <br /> TYa contaminated soil is' being;aerated Soil. in the large <br /> aeration area is about; 2' to 3' deep. The top 5" of sail is <br /> truck, - nitrogen fertilizer added and disked every 2 <br /> irrigated by this sril" is tested using an <br /> Y� to 3 days. After`About 2 weeks, <br /> OVA-128; and if found free hydrocararea bons,abouttaiweekrwhereoit and <br /> moved to the second aeration <br /> also disked. At. the` completion of this:operation, .;the":soil i <br /> tested and then placed in the hole.,and, campacted_ <br /> ,,, -2- <br />