Code of Maine Rules › 06 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL › Chapter 691 - RULE FOR UNDERGROUND OIL STORAGE FACILITIES › Appendix 096-691-Q - Facility Closure Site Assessment Characterization and Notification Requirements

Current through 2024-29, July 17, 2024
For the purpose of site assessment soil testing requirements,
				  soil shall mean sand, silt, clay and mixtures thereof to which oil or oil
				  components may adsorb. Soil does not include pea stone, crushed stone, or
				  similar materials used for backfill around tanks, piping and other facility
				  components.
1. One of the following soil sampling methods must be
				  utilized when conducting a closure assessment in accordance with 06-096 C.M.R.
				  ch. 691, §
									11. Any deviations must be documented
				  and explained in the closure assessment report.
A. The Department's standard operating soil sampling
				  method.
NOTE: The Department's standard operating soil sampling
				  method may be found on the website at:
				  http://www.maine.gov/dep/spills/petroleum/documents/sop/ts004.pdf.This method
				  is entitled Compendium of Field Testing of Soil Samples for Gasoline and Fuel
				  Oil, TS 004.
B. The Site Assessment Soil Sampling Method for laboratory
				  analysis and associated notification levels.
(1) Applicability. This soil sampling procedure is only
				  applicable to facilities that stored gasoline, aviation gasoline, diesel fuel,
				  and #1 and #2 heating oils. Because of the degree of professional judgment
				  required by this procedure, site assessments conducted by this method must be
				  certified by a Maine certified geologist, a Maine licensed professional
				  engineer or geologist or engineer otherwise in compliance with Maine's
				  professional regulation statutes.
(2) Field screen soil from the walls and bottom of the tank
				  excavation hole and piping run and under dispensers using a photo-ionization
				  device (PID) with a lamp energy of 10.2 to 10.6 eV, calibrated to isobutylene
				  in accordance with the instrument's manufacturer instructions and bump tested
				  to check the calibration at the start of each day and after every 2 hours of
				  use.
(3) PID field screening to identify suspected oil
				  contaminated soils must be conducted in accordance with the following minimum
				  requirements:
(a) Collection of 200 gram (6 oz.) soil samples, each placed
				  in a double layered metalized polyester and polyethylene bag, closed, kneaded
				  to break clumps, shaken for 30 seconds, and the headspace concentration
				  immediately measured with the PID while the bag is closed around the instrument
				  probe;
(b) Collection of at least 5 samples for field analysis from
				  the tank excavation, 1 from each side wall and 1 from the excavation
				  bottom;
(c) Collection of at least 1 sample from beneath each
				  dispenser or loading rack;
(d) Collection of samples along each piping run trench
				  beneath the location of joints, elbows, sump penetrations and other likely
				  locations of possible leaks; and
(e) Recording of headspace readings.
(4) Soil samples must be collected for laboratory analysis
				  from the following locations and where in the professional judgment of the site
				  assessor the highest concentrations of oil contamination will be found:
(a) Gasoline, diesel and fuel oil facilities. A minimum of 2
				  soil samples must be collected. One sample must be collected and analyzed from
				  the bottom of the tank excavation and 1 sample must be collected and analyzed
				  from beneath the piping.
(b) Gasoline and aviation fuel facilities. At facilities
				  storing gasoline or aviation gasoline, a minimum of 1 sample must be collected
				  and analyzed at each of the following locations:
(i) Tank excavation bottom where PID Bag Headspace >=40
				  ppm;
(ii) Beneath piping where PID Bag Headspace >=40 ppm;
				  and
(iii) Beneath dispensers where PID Bag Headspace >=40
				  ppm.
(c) Diesel, kerosene and fuel oil facilities. At facilities
				  storing diesel fuels, or #1 or #2 fuel oils, a minimum of 1 sample must be
				  collected and analyzed at each of the following locations:
(i) Tank excavation bottom where PID Bag Headspace
				  >=10ppm;
(ii) Beneath piping where PID Bag Headspace >=10 ppm;
				  and
(iii) Beneath dispensers where PID Bag Headspace >=10
				  ppm.
(5) Laboratory soil and water samples shall be analyzed for
				  volatile (VPH) and extractable petroleum hydrocarbons (EPH) and other
				  parameters including those in Appendix S, as appropriate for the oil products
				  stored at the facility, in accordance with the Massachusetts Department of
				  Environmental Protection Hydrocarbon Fractions Laboratory Method and Appendix
				  S.
C. Other Investigation Methods. Other methods may be proposed
				  for approval by the Commissioner prior to the start of field work. These
				  methods must be able to achieve comparable accuracy and precision and be
				  capable of detecting the corresponding notification levels specified in this
				  appendix. Other investigative methods may include, but are not limited to,
				  soil, ground water, pore water and if applicable surface water contamination
				  investigations using geoprobing, or obtaining samples for analysis from soil
				  test pits, or other similar intrusive methods to assess the presence and areal
				  extent of oil contaminated soils, and the presence of ground water and surface
				  water contamination.
2. Notification levels
A. Any exceedance of the VPH, EPH, 1, 2 dichloroethane,
				  ethylene dibromide, or lead laboratory notification levels for soil in Table 1
				  below, or any exceedance of a PID baghead space for gasoline or aviation fuel
				  of 40 ppm or for diesel, kerosene and fuel oil 10 ppm, is considered evidence
				  of a reportable oil discharge, and shall be reported by the facility owner or
				  operator within two (2) hours of discovery. The owner and operator must plan
				  for additional investigation or removal of impacted soils if laboratory results
				  show evidence of contamination above site-specific cleanup goals.
B. Any VPH, EPH, 1,2 dichloroethane, ethylene dibromide, or
				  lead analytical result from ground water indicative of contamination as defined
				  in this Chapter is considered evidence of a reportable discharge and shall be
				  reported by the facility owner or operator within two (2) hours of discovery.
				  Table 2 presents ground water notification levels based on maximum exposure
				  guidelines published by the Maine Center for Disease Control and Prevention
				  (December 31, 2016).
C. Any of the conditions in Appendix P(7)(B) through (D) must
				  be reported to the Department in accordance with Appendix P.
Table 1
Laboratory Soil Notification Levels
Chemical/Fraction
Concentration
(mg/kg)
1,2 Dichloroethane
0.036
2-Methylnaphthalene
3.6
Acenaphthene
170
Acenaphthylene
68
Anthracene
760
Benzene
0.51
Benzo(a)anthracene
2.3
Benzo(a)pyrene
2.3
Benzo(b)fluoranthene
3.5
Benzo(g,h,i)perylene
750
Benzo(k)fluoranthene
2.6
Chrysene
26
Dibenz(a,h)anthracene
0.48
Ethylbenzene
0.81
Ethylene dibromide
7.1
Fluoranthene
1,000
Fluorene
120
Indeno(1,2,3-cd)pyrene
1.6
Lead
100
Methyl tertiarybutyl ether
0.19
Naphthalene
1.7
Phenanthrene
97
Pyrene
750
Toluene
8.1
Xylene
26
C5-C8 Aliphatics
1,400
C9-C12 Aliphatics
2,700
C9-C18 Aliphatics
2,700
C19-C36 Aliphatics
10,000
C9-C10 Aromatics
75
C11-C22 Aromatics
460
Table 2
Laboratory Notification Levels in Ground Water
Chemical/Fraction
Concentration (µg/l)
1,2 Dichloroethane
4
2-Methylnaphthalene
30
Acenaphthene
400
Acenaphthylene
400
Anthracene
2,000
Benzene
4.0
Benzo(a)anthracene
0.5
Benzo(a)pyrene
0.05
Benzo(b)fluoranthene
0.5
Benzo(g,h,i)perylene
200
Benzo(k)fluoranthene
5.0
Chrysene
50
Dibenz(a,h)anthracene
0.05
Ethylbenzene
30
Ethylene dibromide
0.2
Fluoranthene
300
Fluorene
300
Indeno(1,2,3-cd) pyrene
0.5
Lead
10
Methyl tertiarybutyl ether
35
Naphthalene
10
Phenanthrene
200
Pyrene
200
Toluene
600
Xylene
1,000
C5-C8 Aliphatics
300
C9-C12 Aliphatics
700
C9-C18 Aliphatics
700
C19-C36 Aliphatics
10,000
C9-C10 Aromatics
200
C11-C22 Aromatics
200