North Carolina Administrative Code › Title 15A - Environmental Quality › Chapter 02 - Environmental Management › Subchapter L - GROUNDWATER CLASSIFICATION AND STANDARDS › Section .0400 - RISK-BASED ASSESSMENT AND CORRECTIVE ACTION FOR PETROLEUM UNDERGROUND STORAGE TANKS › Section 02L .0413 - ANALYTICAL PROCEDURES FOR GROUNDWATER SAMPLES

Current through Register Vol. 39, No. 2, July 15, 2024
(a)
				  Analytical procedures for groundwater samples required under this Section shall
				  be methods accepted by the US EPA as suitable for determining the presence and
				  concentration of petroleum hydrocarbons for the type of petroleum
				  released.
(b) Groundwater samples,
				  including the most contaminated sample, shall be analyzed as follows in order
				  to determine the risks of the constituents of contamination:
(1) groundwater samples collected from a
				  discharge or release of low boiling point fuels, including gasoline, aviation
				  gasoline, and gasohol, shall be analyzed for volatile organic compounds,
				  including xylenes, isopropyl ether, and methyl tertiary butyl ether, using
				  Standard Method 6200B or EPA Methods 601 and 602. Samples shall also be
				  analyzed for ethylene dibromide using EPA Method 504.1 and lead using Standard
				  Method 3030C preparation. 3030C metals preparation, using a 0.45 micron filter,
				  shall be completed within 72 hours of sample collection;
(2) groundwater samples collected from a
				  discharge or release of high boiling point fuels, including kerosene, diesel,
				  varsol, mineral spirits, naphtha, jet fuels, and fuel oil no. 2, shall be
				  analyzed for volatile organic compounds using EPA Method 602 and semivolatile
				  organic compounds plus the 10 largest non-target peaks identified using EPA
				  Method 625;
(3) groundwater samples
				  collected from a discharge or release of heavy fuels shall be analyzed for
				  semivolatile organic compounds plus the 10 largest non-target peaks identified
				  using EPA Method 625;
(4)
				  groundwater samples collected from a discharge or release of used or waste oil
				  shall be analyzed for volatile organic compounds using Standard Method 6200B,
				  semivolatile organic compounds plus the 10 largest non-target peaks identified
				  using EPA Method 625, and chromium and lead using Standard Method 3030C
				  preparation. 3030C metals preparation, using a 0.45 micron filter, shall be
				  completed within 72 hours of sample collection;
(5) groundwater samples collected from a
				  discharge or release subject to this Section shall be analyzed for alkane and
				  aromatic carbon fraction classes using methods approved by the Director under
				  15A NCAC
				  02H .0805(a)(1);
(6) analytical methods specified in
				  Subparagraphs (1), (2), (3) and (4) of this Paragraph shall be performed as
				  specified in the following references or the most recent version of these
				  references:
(A) Guidelines Establishing Test
				  Procedures for the Analysis of Pollutants under the Clean Water Act, 40 CFR
				  Part 136, is incorporated by reference and may be obtained electronically free
				  of charge from the United States Environmental Protection Agency website at
https://www.epa.gov/cwa-methods
;
(B) Standard Methods for the Examination of
				  Water and Wastewater, published jointly by American Public Health Association,
				  American Water Works Association and Water Pollution Control Federation, is
				  incorporated by reference and is available for purchase from the American Water
				  Works Association (AWWA), 6666 West Quincy Avenue, Denver, CO 80235 for a
				  charge of one hundred sixty dollars ($160.00) for the
				  18th Edition, one hundred eighty dollars ($180.00)
				  for the 19th Edition, and two hundred dollars
				  ($200.00) for the 20th Edition; or
(C) in accordance with methods or procedures
				  approved by the Director under
				  15A NCAC
				  02H .0805(a)(1);
(7) other EPA-approved analytical
				  methods may be used if the methods include the same constituents as the
				  analytical methods specified in Subparagraphs (1), (2), (3), and (4) of this
				  Paragraph and meet the detection limits of the analytical methods specified in
				  Subparagraphs (1), (2), (3), and (4) of this Paragraph; and
(8) metals and acid extractable organic
				  compounds shall be eliminated from analyses of groundwater samples collected
				  pursuant to this Section if these compounds are not detected in the groundwater
				  sample collected from the source area monitoring well installed pursuant to
				  Rule .0405 of this Section.