1 / 12

DRAFT Field Sampling Guidance

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.

thao
Download Presentation

DRAFT Field Sampling Guidance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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

  2. 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@alaska.gov

  3. Soil Sampling • General guidelines • Field screening • Soil analytical sample collection • Soil sampling equipment

  4. Excavated Soil Sample Collection Guide 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)

  5. Surface/Excavation Soil Sample Collection Guide Previous requirement: At least 1 field screening for every 100 sq ft of excavation bottom. For sidewalls, assess where contamination is most likely present. 2 lab samples for 0-250 sq ft + 1 lab sample for each additional 250 sq ft or portion thereof.

  6. Groundwater Sampling • General groundwater sampling requirements • Drinking water sampling and analysis • Groundwater analytical sample collection (including no purge and passive groundwater sampling for VOCs) • Groundwater sampling equipment(Bailers and peristaltic pumps not recommended for VOCs)

  7. Air Sampling • Vapor Intrusion • DEC’s Draft Vapor Intrusion Guidance

  8. Quality Control Measures • Field documentation- include complete copy of field notes in reports • Instrument calibration • General sample collection QC • Equipment decontamination • Chain-of-Custody, sample handling, and shipment

  9. Appendices • A – References • B – Initial comparison for selecting appropriate field screening method • C – Technical and logistical screening method comparison • D – Soil, sediment, sludge, and fill sample collection • E – Groundwater, surface water, marine water, drinking water, and waste sample collection • F – Determination of sampling and lab analysis for petroleum in soil and groundwater • G – Summary of analytical methods for soil gas, indoor and ambient air samples

  10. App. F: Determination of sampling and laboratory analysis for soils and groundwater Previous requirement: For any sample, if the sum of the hydrocarbon fractions (i.e. DRO, GRO, RRO) are greater than 500 mg/kg then PAH analysis was required. The other red highlighted areas were only required on a site specific basis previously. 7 For each source area, PAH analysis must be performed on a percentage on the samples with the highest DRO, RRO, GRO, concentrations to determine if PAHs are contaminants of concern. In general 10% are recommended for site characterization. If PAH concentrations are less than applicable cleanup levels, further PAH analysis is generally not required. PAHs should be sampled in groundwater if soil sample concentrations are above applicable cleanup levels and groundwater sampling is required.

  11. Draft Field Sampling Guidance Questions?

  12. Documented affects on VOCs http://water.usgs.gov/owq/FieldManual/Chapter2/Chapter2_V2uncompressed.pdf Section 2.1.2 A, page 46, loss of dissolved gasses due to vacuum. ASTM D7353- “Peristaltic pumps use a vacuum to transport the samples. This vacuum may cause some degassing and loss of volatile organic compounds (VOCs) from the sample.” http://www.epa.gov/region09/qa/pdfs/rcra_gwm92.pdf “Recent research focusing on the comparison of different types of ground-water sampling equipment demonstrates that significant loss of volatile organic compounds may occur when bailers are used to sample ground water (Pearsall and Eckhardt, 1987; Yeskis et al., 1988; Tai et al., 1991; Pohlmann et al., undated).” http://www.dnr.state.wi.us/org/water/dwg/gw/dsh_3a.htm According to a study conducted by Barker and Dickhout (1988) to evaluate the loss of volatile organic analytes from groundwater ….”the peristaltic pump provided samples with a significant negative bias (9 to 33 percent lower) relative to the bladder pump and inertial-lift pump methods.” http://www.state.nj.us/dep//srp/guidance/lowflow/lowflow05.htm Regarding Bailers- …[VOC] …results may be biased low (due to aeration) and metals analytical results may be biased high (due to turbidity).

More Related