OAR 340-122-0218: Cleanup Rules for Leaking Petroleum UST Systems: Sampling and Analysis

(1) To streamline the investigation of petroleum UST release sites, a responsible person may use expedited site assessment methods (e.g., push probe samplers) for sample collection and analysis as long as all methods and results are documented in subsequent reports to the Department. However, samples used to demonstrate compliance with remediation levels must be collected and analyzed in accordance with this section. (a) Sample collection, preservation, storage, and handling methods must conform with appropriate procedures in “Test Methods for Evaluating Solid Waste,” SW-846, 3rd Edition, Final Updates I, II, IIA, IIB and III, Revised May 1997 (U.S. EPA). (b) Samples must be tested for all reasonably likely contaminants of concern relevant to the petroleum released, the age of the release, and the medium contaminated taking into account appropriate remediation levels. The following must be considered and, where appropriate, sampled: (A) Total Petroleum Hydrocarbons (TPH) in the gasoline range and TPH in the diesel/lube oil range, as appropriate; (B) For gasoline releases, benzene, toluene, ethylbenzene and total xylenes (BTEX); naphthalene, lead, ethylene dibromide (EDB), ethylene dichloride (EDC), and methyl t-butyl ether (MTBE); (C) For diesel or heating oil releases, BTEX and polynuclear aromatic hydrocarbons (PAHs); and (D) For waste oil releases, BTEX, PAHs, volatile chlorinated hydrocarbons, and leachable concentrations of cadmium, chromium, and lead. (c) Groundwater samples collected for the purpose of testing for lead must be filtered immediately upon collection using a 0.45 micron filter and analyzed for dissolved lead. (d) The following analytical methods must be employed. (A) Total Petroleum Hydrocarbons must be analyzed by the Northwest Total Petroleum Hydrocarbon Methods (DEQ, December 1996) including, as appropriate: (i) Hydrocarbon Identification by NWTPH-HCID; (ii) Gasoline Range Hydrocarbons by Method NWTPH-Gx; and (iii) Diesel/Lube Oil Range Hydrocarbons by Method NWTPH-Dx. (B) Leachable concentrations of cadmium, chromium, and lead must be analyzed by EPA Method 1311 (Toxicity Characteristic Leaching Procedure). (C) All other contaminants of concern must be analyzed by appropriate procedures described in “Test Methods for Evaluating Solid Waste,” SW-846, 3rd Edition, Final Updates I, II, IIA, IIB and III, Revised May 1997 (U.S. EPA). (e) The Department may accept alternative sampling and analytical methods that have been shown to be appropriate for the contaminants of concern and the media of interest, and that have acceptable quality control measures, and limits of detection. (2) The Department may request additional tests if site-specific conditions warrant additional information. [NOTE: Referenced documents not linked to below are available from the agency.] [ED. NOTE: To view attachments referenced in rule text, click here to view rule.]