Laserfiche WebLink
Working to Restore Nature <br /> Soil samples selected for laboratory analysis were removed from the sampler and quickly <br /> sealed in their brass sleeves with Teflon tape and plastic caps The sample containers were <br /> labeled in the field with the,lob number, sample location and depth, and date, and promptly <br /> placed in iced storage for transport to the laboratory Chain of Custody Records were <br /> initiated in the field by the geologist and accompanied the samples to a laboratory certified <br /> by the State of California to perforin the analyses requested <br /> Logging of BorinV <br /> Soil cuttings and samples were identified using visual and manual methods and logged using <br /> the Unified Soil Classification System Samples not selected for chemical analysis and the <br /> soil sampler shoe were extruded in the field for examination The texture, color, moisture, <br /> plasticity, and consistency of soil, the blow counts, and subjective evidence of hydrocarbons, <br /> such as soil staining, obvious product odor, and photoionization detector (or similar <br /> instrument) readings were noted in the field on the Logs of Borings <br /> Vapor-Extraction Well Construction <br /> Vapor-extraction wells were constructed with thread-jointed,4-inch-inner-diameter,Schedule <br /> 40 PVC casing No chemical cements, glues, or solvents were used in well construction <br />. The screened portion of each well consists of factory-perforated casing with 0 10-inch-wide <br /> slots The annular space in each well was packed with pea gravel to a point approximately <br /> 1 foot above the slotted interval A bentonite plug was added above the pea gravel and <br /> beneath the overlying cement/bentonite slurry The remaining annulus was backfilled to <br /> grade with a bentonite-cement slurry The vapor-extractton wells are protected by a traffic- <br /> rated, water resistant, cast-aluminum utility box <br /> 1214dcam/38032-14 <br />