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Ecology Publications & Forms |
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Ecology Publications & Forms |
| Title | Quality Assurance Project Plan: Guidance for the WDOE NWTPH-Dx Method for Testing Groundwater |
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Quality Assurance Project Plan: Guidance for the WDOE NWTPH-Dx Method for Testing Groundwater (Number of pages: 40) (Publication Size: 1421KB)
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| Author(s) | Hobbs, W. | ||||
| Description | Under the Model Toxics Control Act (MTCA) Cleanup Regulation, Method A is one of the most common approaches used to establish cleanup levels that are applicable to groundwater impacted by hydrocarbons. Under Method A, a total petroleum hydrocarbon (TPH) approach may be taken. In 1997, the Washington State Department of Ecology (Ecology) published analytical methods for TPH. Under guidance by Ecology’s Toxic Cleanup Program, a silica gel cleanup (SGC) step can be employed where groundwater may contain a component of naturally occurring organics that may interfere with the NWTPH-Dx analysis. Since the original publication of the NWTPH method for water, there have been no updates or guidance offered that address possible clarification and improvements to the SGC step. This project will survey accredited labs to ascertain how the NWTPH-Dx method is currently being used. Participating labs will then work with Ecology’s Manchester Environmental Laboratory to (1) provide guidance on how the SGC step within the NWTPH-Dx method could be improved and clarified for groundwater samples and (2) participate in an interlaboratory comparison using a revised approach. |
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ADA Accessibility The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188. Visit Ecology’s website for more information. |
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| Contact | Will Hobbs at 360-407-6764 or whob461@ecy.wa.gov | ||||
| Keywords | QAPP, polar metabolite, weathered diesel, toxicity, hydrocarbon, NWTPH | ||||
| DATA | Environmental Information Management (EIM) #WHOB005 |
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| RELATED PUBLICATIONS | Title:
Environmental Effects-Based Concentrations for Weathered Diesel-Range Organics: Toxicity in Marine Water and Freshwater Addendum to Quality Assurance Project Plan: Environmental Effects-Based Concentrations for Total Petroleum Hydrocarbons (TPH) in Marine Water and Freshwater Environmental Effects-Based Concentrations for Total Petroleum Hydrocarbons (TPH): Toxicity in Marine Water and Freshwater Quality Assurance Project Plan: Environmental Effects-Based Concentrations for Total Petroleum Hydrocarbons (TPHs) in Marine Water and Freshwater |
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