Laserfiche WebLink
The samples will then be labeled with a unique sample number, date, time of collection, <br /> initials of collector, Terranext project number and any other pertinent information. Each <br /> water sample will be placed in an insulated chest containing ice and delivered (along with <br /> chain-of-custody documentation) to Quanterra Environmental Services for analysis. <br /> 4 <br /> 4.4 Borehole Abandonment Procedures <br /> After each soil boring has been drilled and necessary samples have been collected, the soil <br /> boring will be abandoned. Borehole abandonment will consist of placing a cement/bentonite <br /> grout through the center of the hollow-stem augers as they are slowly raised to the surface. <br /> The grout mix will consist of approximately 2 pounds of powdered bentonite added to 6.5 to <br /> 7 gallons of potable water and mixed with 94 pounds (one sack) of cement. The bentonite <br /> Lwill be added to the water and allowed to hydrate by circulating the mixture using a grout <br /> pump or mixing apparatus. The cement will then be added to the bentonite/water mixture <br /> and thoroughly mixed. The borings will be backfilled by placing the grout mixture through <br /> the augers while the augers are slowly removed from the hole in 5-foot increments. This <br /> process will be repeated until the boring is filled to the ground surface. <br /> 4.5 Laboratory Analysis <br /> Selected soil and ground water samples may be analyzed by the following analytical methods: <br /> * TPH-D by EPA Method 8015 Modified; <br /> * BTEX by EPA Method 8020; <br /> * Phenols by EPA Method 8270; and <br /> * CAM metals by EPA 6000/7000 Series Methodology. <br /> 4 <br /> r 809-001.wkp/03-06-97/u/keydata/workplan 8 <br /> I{rr TerwNext <br />