Current through Register Vol. 63, No. 3, March 1, 2024
(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.]
Statutes/Other Implemented: ORS
465.200
- 465.455 & 466.706 - 466.835
