Laserfiche WebLink
ES-RR&IH-001 <br /> ® Stantec Soil Sampling SOP Page 7 of 11 <br /> Rev. 2 Jun 2016 <br /> 3. Tightly seal the VOA vial. <br /> 4. Repeat this step with the second sodium bisulfate VOA vial. <br /> 5. Then, repeat with the methanol preserved VOA vial. <br /> 6. Collect a soil sample in the 4-ounce wide mouth glass jar provided by the lab. <br /> 7. Make sure sample containers are labeled and bagged in plastic or bubble bags. <br /> 8. Ice the samples. <br /> 8.2 Hand Auger Sampling <br /> Shallow soil boreholes less than five (5) feet in depth can be collected using a hand <br /> auger. The auger will be advanced until the desired sampling depth is reached. The <br /> auger will be removed from the boring, the sample will be extracted from the hand <br /> auger and field screened (as appropriate), and representative grab samples will be <br /> collected and placed into the appropriate labeled sample container. Decontamination <br /> of the auger and extensions will occur after each sample. <br /> Boreholes will be abandoned by backfilling with bentonite chips and hydrating with <br /> potable water. <br /> 8.3 Excavation <br /> Excavations and test pits will be excavated using a backhoe provided by the <br /> subcontractor. The dimensions of individual excavations will vary depending on the <br /> strength and stability of the trench walls and the specific purpose of the trench. <br /> Excavations greater than four (4) feet deep will not be entered by any personnel unless <br /> shoring is performed or the sides are stepped back to the proper angle per OSHA <br /> requirements. <br /> When starting an excavation, the backhoe operator will first remove the topsoil or cover <br /> (if any) and place it in a discrete mound at least five (5) feet from the edge of the <br /> excavation. The excavation will be continued in approximately 6-inch cuts with the <br /> backhoe using a horizontal scraping motion rather than a vertical scooping motion. If a <br /> visibly-stained or otherwise chemically-affected soil interval is encountered, the affected <br /> excavated soils will be placed on 4-mil thick plastic sheeting. <br /> 8.3.1 Excavation Sampling <br /> Samples will be collected from the backhoe bucket using a stainless steel trowel or similar. <br /> The top layer of soil will be removed prior to collecting the sample. The soil will then be <br /> placed in the appropriately labeled sample container and placed inside a chilled cooler. <br /> 8.3.2 Excavation Backfilling <br /> The soils will be replaced in the excavation at their original depths to the extent <br /> THIS INFORMATION FOR AUTHORIZED COMPANY USE ONLY <br /> STANTEC CONSULTING <br />