Laserfiche WebLink
SIERRA <br /> Clint Rogers Page 6 <br /> March 25, 1991 <br /> The water samples will be collected using steam-cleaned teflon bailers. Sample containers <br /> will be obtained from the analytic laboratory prior to sampling. The ;water samples%will be <br /> decanted in sample containers, labeled and refrigerated for transport to the laboratory. Chain of <br /> custody records will be maintained for the samples. <br /> A bailer blank will be prepared at the site and a trip blank will accompany the samples to <br /> the laboratory. Both the trip blank and the bailer blank will be analyzed for TPPH(G) and BTEX. <br /> The ground water samples from the wells will be analyzed for TPPH(G) and TPH(D) by EPA <br /> Method 5030/8015 and EPA Method 8015, respectively. The ground water samples will also be <br /> analyzed for BTEX and organic lead by EPA Method 8020 and the DHS LUFT method,respectively. <br /> Task 5 - Surveying and Ground Water Gradient <br /> The top of casing elevations of the new wells will be surveyed by a Iicensed land surveyor. <br /> The casing elevations will be surveyed relative to mean sea level using a USGS benchmark. <br /> Water and product (if present) levels will be measured using a MMC flexi-dip interface <br /> probe. Water and product levels will be reported to the nearest 1/100th of a foot. <br /> A ground water contour map will be prepared using survey and water level data. If free- <br /> phase hydrocarbons are detected in more than two wells, a product-thickness contour map will <br /> also be prepared. A sample of the free-phase product will be collected so that specific gravity and <br /> identification of the product can be determined by the laboratory. The specific gravity of the fuel <br /> will be used to correct the ground water elevations in the wells which contain free-phase <br /> hydrocarbons. <br />