Laserfiche WebLink
PMY() l <br /> • Using the same hand trowel or spoon, scrape additional material off of the sidewall, at the <br /> appropriate depth, into a decontaminated sieve (if larger particles are to be screened out), or <br /> directly into the laboratory provided sample container (if screening is not required). Soil that <br /> falls through the sieve should be caught in a decontaminated stainless-steel bowl. Laboratory <br /> provided sample containers should then be filled out of the stainless-steel bowl. Minimize the <br /> amount of time the soil is exposed to atmospheric conditions, and seal inside the sample <br /> containers as soon as practical. <br /> • Label sample containers and place in cold storage. All samples should be chilled to and <br /> maintained at 4° C until delivered to the laboratory. Enter the sample into the chain of <br /> custody, or other field data validation form, such as the soil sampling form or field book, if <br /> compositing with other samples at the laboratory is to be conducted. All spaces on the field <br /> forms should be completed and if not applicable, NA should written into those spaces. <br /> • Once all depth appropriate samples are collected, packaged, labeled, and properly stored, <br /> direct the excavator operator to backfill the test pit using soils generated during its excavation. <br /> 8. Do not enter any pit or trench deeper than three feet. A hand auger with extensions may be required in <br /> some cases. In situations where test pit depths exceed 3 feet, soil samples may be collected from the <br /> excavator bucket; however, care must be taken to assure that the sample is representative of the sample <br /> location, not sluff, and that the sample is not compromised with material from other vertical intervals. <br /> 9. If sampling for volatiles or other potential contaminants where use of a photoionization detector is <br /> appropriate, place a small portion of the soil sample into a"Zip-IockTM" bag and seal the bag immediately. <br /> Screen the soil with the photoionization detector or designated field screening instrument, after a few <br /> minutes, allowing the sample to equilibrate with the headspace inside the baggie. <br /> 10. To prevent volatilization, care should be taken to minimize soil exposure to air and heat and to minimize <br /> disturbance of the soil. The soil should completely fill the sampling jar with no headspace room, especially <br /> if analyzing for volatile organic compounds. <br /> Soil Sampling with Excavator or Backhoe <br /> December 23, 2022 <br /> Page 3 of 3 <br />