Laserfiche WebLink
Kennedy/Jenks Consultants <br /> • Insulated sample storage and shipping containers <br /> • Personal protective equipment (refer to project site safety plan) <br /> TYPICAL PROCEDURE <br /> 1. Obtain applicable drilling and well construction permits prior to mobilization. <br /> 2. Clear drilling locations for underground utilities and structures by Underground <br /> Service Alert (USA) and subcontractors. <br /> 3. Have all downhole equipment steamcleaned prior to drilling each boring. <br /> 4. Ensure that soil borings not to be completed as monitoring wells are drilled with an <br /> auger drill rig, using hollow stem augers of appropriate size. <br /> 5. Make sure that borings not completed as monitoring wells are grouted to the <br /> surface, using a neat cement-bentonite grout (containing approximately 5 percent <br /> bentonite). <br /> 6. Ensure that borings made to construct shallow monitoring wells are drilled with an <br /> auger drill rig that uses hollow stem augers of appropriate size to provide an <br /> annular space of a minimum of 2 inches between borehole wall and well casing. <br /> 7. Verify that drill borings used to construct deeper monitoring wells are drilled with a <br /> dual tube percussion hammer or air-rotary casing hammer, using a steel drive <br /> casing of appropriate size, or with hollow stem augers through a steel conductor <br /> casing. <br /> 8. Collect soil samples for lithologic logging purposes with a CME continuous coring <br /> system in 5-foot increments. <br /> 9. Collect soil samples for lithologic logging and chemical and physical analyses by <br /> driving a split-spoon drive sampler, in 2.5- to 5-foot increments, below the depth of <br /> the auger bit with a rig-mounted hammer. Record the standard penetration <br /> resistance. If the sample is pushed rather than driven, be sure to record the push <br /> force. <br /> 10. When drilling with air-driven drill rigs, collect soil samples for lithologic logging <br /> purposes from the cyclone separator discharge on the dual tube percussion <br /> hammer, which separates air from formation cuttings as the drive casing is <br /> advanced. <br /> 11. Have the soils classified in the field in approximate accordance with the visual- <br /> manual procedure of the Unified Soil Classification System (ASTM D-2488-93) and <br /> the Munsell Color Classification. <br /> 12. Prior to each sampling event, wash the split-spoon drive sampler and brass liners <br /> with high purity phosphate-free soap, and double-rinse them with deionized water <br /> and methanol and/or 0.1 N nitric acid, as appropriate. <br /> 13. At each sampling interval, collect soil in one brass liner for potential laboratory <br /> analysis. Cover this sample in Teflon sheets, seal it with plastic caps, and wrap it <br /> with silicon tape. Place a completed sample label on the brass liner. Then see that <br /> the samples are placed in appropriate containers and stored at approximately 4°C. <br /> i:\job\96\966070.01\workplan\ap pend-b.doc B-2 <br />