C.M.R. 06, 096, ch. 691, app 096-691-Q
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 |
C.M.R. 06, 096, ch. 691, app 096-691-Q