DRAFT Field Sampling Guidance Alaska DEC野外取样指南阿拉斯加12月.pptxVIP

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DRAFT Field Sampling Guidance Alaska DEC野外取样指南阿拉斯加12月.pptx

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DRAFT Field Sampling Guidance To be used this field season by DEC and consultants Initial focus on soil, groundwater, and vapor intrusion Future versions to include remediation system and outdoor air sampling, surface water and sediment sampling DRAFT Field Sampling Guidance Soliciting ideas for the document Living document For this field season-comments needed by March 15th Are you on our List Serve? Denise.Elston@ Soil Sampling General guidelines Field screening Soil analytical sample collection Soil sampling equipment Excavated Soil Sample Collection Guide By Volume (cubic yards) Number of Screening Samples Associated Number of Laboratory Samples 0-10 5 1 11-50 5 2 51-100 1 per 10 CY 3 More than 100 1 per 10 cy, or as the department determines necessary 3 samples, plus one (1) sample for each additional 200 cubic yards, or portion thereof or as the department determines necessary. Previous requirement: Field screening 1 per 10 CY. For untreated stockpile 2 lab samples for 0-50 CY, plus 1 lab sample per additional 50 CY or portion thereof. For treated stockpile 5 lab samples for 101-500 CY, 7 lab for 501-1000 CY, 10 lab for 1001-2000 CY, and 10+1 lab per 500 CY or portion thereof for 2000+ CY (or as the department determines necessary) Surface/Excavation Soil Sample Collection Guide By Surface Area (square feet) Number of Screening Samples Associated Number of Laboratory Samples 0-50 5 1 51-124 5 2 125-250 1 per 25 sq ft 2 250 10 plus 1 per additional 100 ft2, or as the department determines necessary 2 samples, plus one sample for each additional 250 square feet, or portion thereof; or as the department determines necessary. Excavation sidewalls For each excavation sidewall, 1 per 10 linear feet, or portion thereof, with field screening sample collection focused on soil horizons demonstrate