310 CMR, § 40.0985

Current through Register 1536, December 6, 2024

Section 40.0985 - Determination of Method 2 Soil Standards Considering Leaching Potential

MCP Method 1 Soil Standards consider both the risks associated with direct contact with the contaminated soil and the potential for the oil and/or hazardous material to leach to groundwater. The leaching component of the MCP Method 1 Soil Standards can be modified or eliminated in Method 2 considering site-specific information. The direct contact-exposure component of the standard shall not be adjusted in this Method.

(1) The development of alternative leaching-based soil concentrations or the determination that leaching-based concentrations are not applicable shall be based upon information which is scientifically justified and completely documented.

(2) When developing alternative leaching-based concentrations in soil, alternative values shall be developed for each oil and hazardous material and for each applicable groundwater category. Demonstrations that the leaching-based component of the Method 1 soil standards is not applicable may be made on a chemical-by-chemical basis or for the site as a whole, depending upon the information relevant to that determination.

(3) The following methods may be used to demonstrate that the concentrations of oil and/or hazardous material in soil at the disposal site now and in the foreseeable future will result in compliance with all applicable MCP Method 1 or 2 Groundwater Standards:

(a) transport and fate modeling that incorporates site-specific information on source mass and subsurface hydrogeological conditions; and/or

(b) laboratory tests that demonstrate, under site conditions, the oil and/or hazardous material in the soil will not leach to groundwater at levels which exceed the applicable MCP Method 1 or 2 Groundwater Standards.

(4) For each combination of soil category (S-1, S-2, and S-3) and groundwater category (GW-1, GW-2, and GW-3), the lower of the following is the applicable MCP Method 2 Soil Standard for the oil and/or hazardous material:

(a) The leaching-based soil concentration identified in 310 CMR 40.0985(2) specific to the groundwater category, and

(b) The direct contact exposure-based concentration specific to the soil category, listed in Table 5 in 310 CMR 40.0985(6). The direct contact standard is applicable when it is determined that the leaching-based component of the Method 1 standard is not applicable per 310 CMR 40.0985(2).

(5) Groundwater monitoring shall demonstrate that residual soil contamination is not and will not result in groundwater concentrations greater than the applicable MCP Method 1 or 2 Groundwater Standards. The duration of required monitoring shall depend on the source mass, the mobility of the oil and/or hazardous material, and subsurface conditions.

(6)Table 5 Lists the Direct Contact Exposure-based Soil Concentrations.

310 CMR 40.0985(6): TABLE 5 [DOUBLE DAGGER] MCP Method 2: DIRECT CONTACT EXPOSURE-BASED SOIL CONCENTRATIONS APPLICABLE TO THE SPECIFIED SOIL CATEGORY.
Oil and/or Hazardous Material	CAS Number	Soil Category S-1 µg/g (ppm)	Soil Category S-2 µg/g (ppm)	Soil Category S-3 µg/g (ppm)
ACENAPHTHENE	83-32-9	1,000	3,000	5,000
ACENAPHTHYLENE	208-96-8	1,000	3,000	5,000
ACETONE	67-64-1	500	1,000	3,000
ALDRIN	309-00-2	0.09	0.5	4
ALIPHATIC HYDROCARBONS (See Petroleum HydrocarbonS)
ANTHRACENE	120-12-7	1,000	3,000	5,000
ANTIMONY	7440-36-0	20	40	40
AROMATIC HYDROCARBONS (See Petroleum Hydrocarbons)
ARSENIC	7440-38-2	20	20	60
BARIUM	7440-39-3	1,000	3,000	5,000
BENZENE	71-43-2	40	200	1,000
BENZO(a)ANTHRACENE	56-55-3	20	300	2,000
BENZO(a)PYRENE	50-32-8	2	30	30
BENZO(b)FLUORANTHENE	205-99-2	20	300	2,000
BENZO(g,h,i)PERYLENE	191-24-2	1,000	3,000	5,000
BENZO(k)FLUORANTHENE	207-08-9	200	3,000	5,000
BERYLLIUM	7440-41-7	100	200	200
BIPHENYL, 1,1-	92-52-4	200	1,000	5,000
BIS(2-CHLOROETHYL)ETHER	111-44-4	2	9	90
BIS(2-CHLOROISOPROPYL)ETHER	108-60-1	30	100	1,000
BIS(2-ETHYLHEXYL)PHTHALATE	117-81-7	100	700	2,000
BROMODICHLOROMETHANE	75-27-4	40	200	500
BROMOFORM	75-25-2	300	1,000	3,000
BROMOMETHANE	74-83-9	100	700	700
CADMIUM	7440-43-9	80	80	80
CARBON TETRACHLORIDE	56-23-5	30	100	1,000
CHLORDANE	12789-03-6	6	30	60
CHLOROANILINE, p-	106-47-8	7	40	40
CHLOROBENZENE	108-90-7	500	1,000	3,000
CHLOROFORM	67-66-3	500	1,000	1,000
CHLOROPHENOL, 2-	95-57-8	100	400	400
CHROMIUM (TOTAL) *	7440-47-3	100	200	200
CHROMIUM(III)	16065-83-1	1,000	3,000	5,000
CHROMIUM(VI)	18540-29-9	100	200	200
CHRYSENE	218-01-9	200	3,000	5,000
CYANIDE **	57-12-5	30	400	500
DIBENZO(a,h)ANTHRACENE	53-70-3	2	30	200
DIBROMOCHLOROMETHANE	124-48-1	30	100	500
DICHLOROBENZENE, 1,2- (o-DCB)	95-50-1	1,000	3,000	5,000
DICHLOROBENZENE, 1,3- (m-DCB)	541-73-1	100	500	500
DICHLOROBENZENE, 1,4- (p-DCB)	106-46-7	100	400	3,000
DICHLOROBENZIDINE, 3,3'-	91-94-1	3	20	100
DICHLORODIPHENYL DICHLOROETHANE, P,P'- (DDD)	72-54-8	10	40	70
DICHLORODIPHENYL DICHLOROETHYLENE,P,P'- (DDE)	72-55-9	7	30	70
DICHLORODIPHENYL TRICHLOROETHANE, P,P'- (DDT)	50-29-3	7	30	70
DICHLOROETHANE, 1,1-	75-34-3	500	1,000	3,000
DICHLOROETHANE, 1,2-	107-06-2	30	100	1,000
DICHLOROETHYLENE, 1,1-	75-35-4	500	1,000	3,000
DICHLOROETHYLENE, CIS-1,2-	156-59-2	100	500	500
DICHLOROETHYLENE, TRANS-1,2-	156-60-5	500	1,000	3,000
DICHLOROMETHANE	75-09-2	300	800	800
DICHLOROPHENOL, 2,4-	120-83-2	80	900	900
DICHLOROPROPANE, 1,2-	78-87-5	60	300	1,000
DICHLOROPROPENE, 1,3-	542-75-6	20	100	1,000
DIELDRIN	60-57-1	0.09	0.6	4
DIETHYL PHTHALATE	84-66-2	1,000	3,000	5,000
DIMETHYL PHTHALATE	131-11-3	1,000	3,000	5,000
DIMETHYLPHENOL, 2,4-	105-67-9	500	2,000	2,000
DINITROPHENOL, 2,4-	51-28-5	50	900	900
DINITROTOLUENE, 2,4-	121-14-2	2	10	90
DIOXANE, 1,4-	123-91-1	20	100	500
ENDOSULFAN	115-29-7	300	500	500
ENDRIN	72-20-8	20	30	30
ETHYLBENZENE	100-41-4	500	1,000	3,000
ETHYLENE DIBROMIDE	106-93-4	1	5	50
FLUORANTHENE	206-44-0	1,000	3,000	5,000
FLUORENE	86-73-7	1,000	3,000	5,000
HEPTACHLOR	76-44-8	0.3	2	10
HEPTACHLOR EPOXIDE	1024-57-3	0.2	1	1
HEXACHLOROBENZENE	118-74-1	0.7	0.9	0.9
HEXACHLOROBUTADIENE	87-68-3	30	100	100
HEXACHLOROCYCLOHEXANE, GAMMA (gamma-HCH)	58-89-9	2	8	70
HEXACHLOROETHANE	67-72-1	50	300	300
HMX	2691-41-0	1,000	3,000	5,000
INDENO(1,2,3-cd)PYRENE	193-39-5	20	300	2,000
LEAD	7439-92-1	200	600	600
MERCURY	7439-97-6	20	40	40
METHOXYCHLOR	72-43-5	300	400	400
METHYL ETHYL KETONE	78-93-3	500	1,000	3,000
METHYL ISOBUTYL KETONE	108-10-1	500	1,000	3,000
METHYL MERCURY	22967-92-6	5	9	9
METHYL TERT BUTYL ETHER	1634-04-4	100	500	500
METHYLNAPHTHALENE, 2-	91-57-6	300	500	500
NAPHTHALENE	91-20-3	500	1,000	3,000
NICKEL	7440-02-0	700	1,000	1,000
PENTACHLOROPHENOL	87-86-5	3	20	80
PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS)***
PERFLUORODECANOIC ACID (PFDA)	335-76-2	0.3	0.4	0.4
PERFLUOROHEPTANOIC ACID (PFHpA)	375-85-9	0.3	0.4	0.4
PERFLUOROHEXANESULFONIC ACID (PFHxS)	355-46-4	0.3	0.4	0.4
PERFLUORONONANOIC ACID (PFNA)	375-95-1	0.3	0.4	0.4
PERFLUOROOCTANESULFONIC ACID (PFOS)	1763-23-1	0.3	0.4	0.4
PERFLUOROOCTANOIC ACID (PFOA)	335-67-1	0.3	0.4	0.4
PERCHLORATE	NA	4	6	6
PETROLEUM HYDROCARBONS
TOTAL PETROLEUM HYDROCARBON [DAGGER]	NA	1,000	3,000	5,000
ALIPHATIC HYDROCARBONS
C5 through C8 Aliphatic Hydrocarbons	NA	100	500	500
C9 through C12 Aliphatic Hydrocarbons	NA	1,000	3,000	5,000
C9 through C18 Aliphatic Hydrocarbons	NA	1,000	3,000	5,000
C19 through C36 Aliphatic Hydrocarbons	NA	3,000	5,000	5,000
AROMATIC HYDROCARBONS
C9 through C10 Aromatic Hydrocarbons	NA	100	500	500
C11 through C22 Aromatic Hydrocarbons	NA	1,000	3,000	5,000
PHENANTHRENE	85-01-8	500	1,000	3,000
PHENOL	108-95-2	500	1,000	3,000
POLYCHLORINATED BIPHENYLS (PCBs)	1336-36-3	1	4	4
PYRENE	129-00-0	1,000	3,000	5,000
RDX	121-82-4	20	90	400
SELENIUM	7782-49-2	400	800	800
SILVER	7440-22-4	100	200	200
STYRENE	100-42-5	80	300	3,000
TETRACHLORODIBENZO-p-DIOXIN (TCDD), 2,3,7,8-(equivalents)	1746-01-6	2.E-05	6.E-05	6E-05
TETRACHLOROETHANE, 1,1,1,2-	630-20-6	90	400	500
TETRACHLOROETHANE, 1,1,2,2-	79-34-5	10	50	500
TETRACHLOROETHYLENE	127-18-4	100	500	800
THALLIUM	7440-28-0	8	70	90
TOLUENE	108-88-3	500	1,000	3,000
TRICHLOROBENZENE, 1,2,4-	120-82-1	700	3,000	5,000
TRICHLOROETHANE, 1,1,1-	71-55-6	500	1,000	3,000
TRICHLOROETHANE, 1,1,2-	79-00-5	40	200	500
TRICHLOROETHYLENE	79-01-6	30	70	70
TRICHLOROPHENOL, 2,4,5-	95-95-4	1,000	3,000	5,000
TRICHLOROPHENOL 2,4,6-	88-06-2	30	400	400
VANADIUM	7440-62-2	500	800	800
VINYL CHLORIDE	75-01-4	0.3	10	100
XYLENES (Mixed Isomers)	1330-20-7	500	1,000	3,000
ZINC	7440-66-6	1,000	3,000	5,000
NOTE: All concentrations of oil and/or hazardous material in soil are calculated and presented on a dry weight/dry weight basis. NA - Not Applicable * - The Total Chromium standard is applicable in the absence of species-specific data for Chromium III and Chromium VI. - Cyanide expressed as Physiologically Available Cyanide (PAC). In the absence of measured Physiologically Available Cyanide, the standard is applicable to Total Cyanide. * - The listed compounds and associated CAS numbers are for the acid forms of these PFAS compounds. The information presented in Table 5 are also applicable to the respective anionic forms of these compounds. These anions may form salts with any of a number of cations resulting in a variety of possible chemical species, each having a unique CAS number. [DAGGER]- The Total Petroleum Hydrocarbon (TPH) standard may be used as an alternative to the appropriate combinations of the Aliphatic and Aromatic Hydrocarbon Fraction standards. The use of the general TPH standard is a valid option only for C9 and greater petroleum hydrocarbons; it is not appropriate for the characterization of risks associated with lighter (gasoline-range) hydrocarbons. [DOUBLE DAGGER]- The Department periodically reviews the scientific basis for these Standards and amends them, as appropriate, to incorporate new scientific information.