Laserfiche WebLink
(e,g, upon encountering significant silbsurface utilities, a <br /> building, or roadway) ; samples wnuEachesampple wouldobethe <br /> obtained <br /> and sidewalls of the excavation. ht to grade within the <br /> from an undisturbed block of soil bheutop 111-2" of soil within <br /> excavator bucket. After removing <br /> the bucket, a clean brass sampling tube (1 .9 inches in diameter <br /> by 6.0 inches in length) would be driven <br /> nnntoin he remaining <br /> e ainsampling <br /> soil and completely filled. Promptly be <br /> tube from the soil, the ends of the tube would a cedvwith black <br /> aluminum foil, fitted with plastic caps, and wrapped <br /> tube would be marked <br /> electrical tape• Each and placed on dry <br /> ice for transportation under chain of custody to J.L. Analytical <br /> Laboratory of 17dsal��amplesiwouad beardous analyzedste foraTotal <br /> laboratory. Ane benzene, toluene, <br /> Petroleum Hydrocarbons abenzene l ($TX&E)^using EPA Methods <br /> total xylenes, and ethyl <br /> 5030/8015-8020. Analyses for Total Lead would also be undertaken <br /> using ICAP or AA <br /> o" Will <br /> St is estimated that approximately 100 cubic yards oAlthough dimensions <br /> be excavated during the referenced process. <br /> of the original tank pit are unknown, the apprroximatoximat <br /> e dimensions <br /> of the expanded excavation are indicated on Figure #2, attached. <br /> As you are aware, the original excavation has been closed for <br /> some time. No remediation of previously excavated soils is <br /> known to have occurred. <br /> Should the extent of the ability to eit istproposed thatreached bthere <br /> the plume boundaries are determined, <br /> extent of any further lateral migration be determined through <br /> or analysis (SVA); which would be undertaken under <br /> soil vapor permit. The specific svA procedure <br /> authority of a PH5/EHD <br /> slotted shield <br /> proposed here wou�no'besvfittedhwithsretractableertion j� '8-inch diameter, <br /> stainless steel p the to be determined by <br /> points into the soil at various deo to the subsurface from <br /> lithologic conditions and acceSssibilit�f <br /> isoil vapor (i.e. gases <br /> within the on-site building. pi articles and which would <br /> vbir-h occupy the space between soifppresent) would be acquired <br /> include hydrocarbon contaminants, withdrawing the probe <br /> at the site of each probe insertion g the slotted shield <br /> approximately two inches and exposing <br /> thus permitting the aspiration of a volume of sail gas <br /> points- " vapor analyzer which had been <br /> through a Photovac "Tiparts per million (ppm) hexane standard. <br /> calibrated using a 50 p computer modeling which <br /> Contour maps would be prepared utilizing <br /> taminant patterns and thus also <br /> would show vapor phase con <br /> approximate liquid phase contamination. <br /> groundwater <br /> depth As information acquired from PHS/EHA deo of no less <br /> indicates that <br /> in the area of the Collegeville sit'. is at a <br />