Laserfiche WebLink
D <br />Soil samples for logging and testing will be collected by driving a <br />modified California split -spoon sampler having a 2 -inch -inside - <br />diameter and a 2.5 -inch -outside -diameter. The sampler will be lined <br />with 2 -inch -diameter, stainless steel, thin-walled rings. The sampler <br />will be driven 18 inches into the undisturbed soil at each sampling <br />interval before advancing the borehole with the drill bit. Soil <br />samples from the shallow borings will be collected by driving the <br />sampler into the soil using a 140 -pound hammer dropping an average of <br />30 inches. The sampler will be pushed into the soil in advance of the <br />drill bit on the deeper borings. <br />placed in an ice chest and maintained at 4°C with frozen gel packs. <br />Upon sample collection, chain -of -custody documentation will be initi- <br />ated. This document will accompany the samples to the laboratory. At <br />the laboratory, EMCON personnel will accept the samples by signing the <br />chain -of -custody document and assigning a unique number to each <br />sample. Plate B-1 shows a typical soil analysis request form. Other <br />representative samples for geologic logging will be retained in <br />plastic bags. <br />1 0", Vrtl I I I Me I <br />Boring equipment, including augers, drill rods, drill bits, and drive <br />samplers, will be steam cleaned before starting operations at each <br />boring to prevent possible cross -contamination between borings. In <br />addition, the drive samplers will be washed in a trisodium phosphate <br />detergent solution and rinsed after each sample interval to prevent <br />possible cross -contamination between drives. After sampling, soil <br />borings that are not converted to monitoring wells will be backfilled <br />with a cement -bentonite grout. <br />PJ9 9390313.00D <br />n <br />After the sampler is driven and withdrawn <br />from the hole, both ends of <br />the stainless steel <br />rings will be wrapped <br />with Teflon. Polypropylene <br />caps will be placed <br />over the Teflon to seal <br />the rings. The rings will <br />be placed in glass <br />jars and labeled. All <br />samples will be immediately <br />placed in an ice chest and maintained at 4°C with frozen gel packs. <br />Upon sample collection, chain -of -custody documentation will be initi- <br />ated. This document will accompany the samples to the laboratory. At <br />the laboratory, EMCON personnel will accept the samples by signing the <br />chain -of -custody document and assigning a unique number to each <br />sample. Plate B-1 shows a typical soil analysis request form. Other <br />representative samples for geologic logging will be retained in <br />plastic bags. <br />1 0", Vrtl I I I Me I <br />Boring equipment, including augers, drill rods, drill bits, and drive <br />samplers, will be steam cleaned before starting operations at each <br />boring to prevent possible cross -contamination between borings. In <br />addition, the drive samplers will be washed in a trisodium phosphate <br />detergent solution and rinsed after each sample interval to prevent <br />possible cross -contamination between drives. After sampling, soil <br />borings that are not converted to monitoring wells will be backfilled <br />with a cement -bentonite grout. <br />PJ9 9390313.00D <br />n <br />