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1 <br /> Attachment A <br /> SOIL SAMPLING PROCEDURES <br /> Confirmation Soil Samples <br />' Confirmation soil samples collected from the bottom and sidewalls of the <br /> excavation were collected from the backhoe bucket. Soil was removed from <br /> the surface of the bucket to access relatively undisturbed native material <br /> and to remove slough from the top of the soil. A 2-inch-diameter stainless <br /> steel ring was driven into the soil. The ring was then sealed at both ends <br /> with Teflon tape and plastic and caps, labeled, placed in a ziploc bag, and <br /> placed on ice pending chemical analysis. <br /> Stockpiled Soil Samples <br /> As the soil was being replaced into the excavation, soil samples were <br />' collected at random locations from the stockpile. Soil was removed from the <br /> surface of the pile, or from the recently backhoe-scraped edge, to access <br /> material which has been the least exposed to open air. A 2-inch-diameter <br />' stainless steel ring was then driven into the soil. The sample was sealed at <br /> both ends with Teflon tape and plastic and caps, labeled, placed in a ziploc <br /> bag, and stored on ice pending chemical analysis. <br /> r i <br /> OlOf9010f900020.2aw Rev. 0 October 281992 9 . , <br /> r Pl � <br />