310 CMR, § 40.0996

Current through Register 1536, December 6, 2024

Section 40.0996 - Method 3 Ceiling Limits

(1) Method 3 Ceiling Limits (M3CLs) are concentrations of oil and/or hazardous material in soil or groundwater at the disposal site which, if exceeded under the conditions specified in 310 CMR 40.0996, constitute a significant risk of harm to public welfare and the environment under future conditions.

(2) Characterization of risk of harm to public welfare and the environment shall in all cases include, but not necessarily be limited to, comparison of concentrations of oil and/or hazardous material in soil and groundwater at the disposal site with Method 3 Ceiling Limits, which are listed in 310 CMR 40.0996(7) or identified pursuant to 310 CMR 40.0996(8).

(3) Comparisons of oil and/or hazardous material concentrations in soil and groundwater at the disposal site to Method 3 Ceiling Limits shall be made using:

(a) the arithmetic mean of the concentration of oil or hazardous material in soil and groundwater at a disposal site; and

(b) the arithmetic mean of the concentration of oil or hazardous material within any Hot Spot identified at the disposal site.

(4) Except as provided in 310 CMR 40.0996(5) and (6), a level of No Significant Risk of harm to public welfare and to the environment does not exist for future conditions if the concentration of one or more oil and/or hazardous material exceeds an applicable Method 3 Ceiling Limit, as described at 310 CMR 40.0996(3). The disposal site may, however, pose No Significant Risk for current conditions and thus meet the conditions of a Temporary Solution as described in 310 CMR 40.1050 if all other requirements for a Temporary Solution are satisfied.

(5) For a disposal site where the Method 3 Ceiling Limit in soil or groundwater for Total Petroleum Hydrocarbon is exceeded, a condition of No Significant Risk shall still be considered to exist if the concentrations of the Aliphatic and Aromatic Hydrocarbon Fractions comprising the TPH are less than or equal to the applicable Method 3 Ceiling Limits of such fractions in soil and groundwater.

(6) For a disposal site at which the concentration of one or more oil and/or hazardous material in Soil exceeds a Method 3 Ceiling Limit, a level of No Significant Risk of harm to public welfare and to the environment exists or has been achieved for both current and future conditions if a finding of No Significant Risk of harm to public welfare and the environment has been made pursuant to 310 CMR 40.0994 and 40.0995, respectively, an Activity and Use Limitation is implemented as required in 310 CMR 40.1012(2), and the Soil with concentrations exceeding a Method 3 Ceiling Limit:

(a) has been permanently immobilized or fixated as part of a remedial action;

(b) is located at a depth greater than 15 feet from the ground surface; or

(c) is located beneath an Engineered Barrier implemented pursuant to the requirements at 310 CMR 40.0998.

(7) Table 6 lists the Method 3 Ceiling Limits in Groundwater and Soil.

(8) Except as specified in 310 CMR 40.0996(8)(c) for any oil or hazardous material not listed in Table 6 at 310 CMR 40.0996(7), either a default or chemical-specific Method 3 Ceiling Limit must be used.

(a) The default Method 3 Ceiling Limit in Groundwater shall be 10,000 ug/L and the default Method 3 Ceiling Limit in Soil shall be 1,000 ug/g.

(b) The chemical-specific Method 3 Ceiling Limits shall be calculated using the methodology presented at 310 CMR 40.0983 and 40.0984.

1. The Method 3 Ceiling Limit in Groundwater shall be equal to ten times the highest groundwater standard calculated at 310 CMR 40.0983 or 100,000 ug/L, whichever is lower.

2. The Method 3 Ceiling Limit in Soil shall be equal to ten times the highest soil standard calculated at 310 CMR 40.0984, or 10,000 ug/g, whichever is lower.

(c) For the following oil and/or hazardous material, the Method 3 Ceiling Limits in Soil and Groundwater are not applicable. As a result, the comparison of site concentrations to Method 3 Ceiling Limits pursuant to 310 CMR 40.0996(3) is not required, and the need for an Activity and Use Limitation shall not be determined by comparison to a Method 3 Ceiling Limit in Soil, as described in 310 CMR 40.1012(2)(a)3. and 310 CMR 40.1012(3)(b).

1. aluminum

2. asbestos

3. calcium

4. iron

5. potassium (excluding elemental potassium)

6. sodium (excluding elemental sodium)

(9) Ongoing monitoring shall be performed as necessary to ensure that a condition of No Significant Risk is maintained at any disposal site where a Permanent Solution has been achieved and the concentration of one or more oil and/or hazardous material is greater than the Method 3 Ceiling Limit. The results of such monitoring shall be submitted to the Department.

310 CMR 40.0996(7): TABLE 6 [DOUBLE DAGGER] MCP Method 3: METHOD 3 CEILING LIMITS (M3CLs) IN GROUNDWATER AND SOIL
Oil and/or Hazardous Material	CAS Number	M3CLs IN GROUNDWATER µg/L (ppb)	M3CLs IN SOIL µg/g (ppm)
ACENAPHTHENE	83-32-9	100,000	10,000
ACENAPHTHYLENE	208-96-8	100,000	10,000
ACETONE	67-64-1	100,000	10,000
ALDRIN	309-00-2	300	40
ALIPHATIC HYDROCARBONS (See Petroleum Hydrocarbons)
ANTHRACENE	120-12-7	1,000	10,000
ANTIMONY	7440-36-0	80,000	400
AROMATIC HYDROCARBONS (See Petroleum Hydrocarbons)
ARSENIC	7440-38-2	9,000	600
BARIUM	7440-39-3	100,000	10,000
BENZENE	71-43-2	100,000	10,000
BENZO(a)ANTHRACENE	56-55-3	10,000	10,000
BENZO(a)PYRENE	50-32-8	5,000	300
BENZO(b)FLUORANTHENE	205-99-2	4,000	10,000
BENZO(g,h,i)PERYLENE	191-24-2	500	10,000
BENZO(k)FLUORANTHENE	207-08-9	1,000	10,000
BERYLLIUM	7440-41-7	2,000	2,000
BIPHENYL, 1,1-	92-52-4	100,000	10,000
BIS(2-CHLOROETHYL)ETHER	111-44-4	100,000	900
BIS(2-CHLOROISOPROPYL)ETHER	108-60-1	100,000	10,000
BIS(2-ETHYLHEXYL)PHTHALATE	117-81-7	100,000	10,000
BROMODICHLOROMETHANE	75-27-4	100,000	5,000
BROMOFORM	75-25-2	100,000	10,000
BROMOMETHANE	74-83-9	8,000	7,000
CADMIUM	7440-43-9	80	800
CARBON TETRACHLORIDE	56-23-5	50,000	10,000
CHLORDANE	12789-03-6	20	600
CHLOROANILINE, p-	106-47-8	100,000	400
CHLOROBENZENE	108-90-7	10,000	10,000
CHLOROFORM	67-66-3	100,000	10,000
CHLOROPHENOL, 2-	95-57-8	100,000	4,000
CHROMIUM (TOTAL) *	7440-47-3	3,000	2,000
CHROMIUM(III)	16065-83-1	6,000	10,000
CHROMIUM(VI)	18540-29-9	3,000	2,000
CHRYSENE	218-01-9	700	10,000
CYANIDE **	57-12-5	2,000	5,000
DIBENZO(a,h)ANTHRACENE	53-70-3	400	2,000
DIBROMOCHLOROMETHANE	124-48-1	100,000	5,000
DICHLOROBENZENE, 1,2- (o-DCB)	95-50-1	80,000	10,000
DICHLOROBENZENE, 1,3- (m-DCB)	541-73-1	100,000	5,000
DICHLOROBENZENE, 1,4- (p-DCB)	106-46-7	80,000	10,000
DICHLOROBENZIDINE, 3,3'-	91-94-1	20,000	1,000
DICHLORODIPHENYL DICHLOROETHANE, P,P'- (DDD)	72-54-8	500	700
DICHLORODIPHENYL DICHLOROETHYLENE,P,P'- (DDE)	72-55-9	4,000	700
DICHLORODIPHENYL TRICHLOROETHANE, P,P'- (DDT)	50-29-3	10	700
DICHLOROETHANE, 1,1-	75-34-3	100,000	10,000
DICHLOROETHANE, 1,2-	107-06-2	100,000	10,000
DICHLOROETHYLENE, 1,1-	75-35-4	100,000	10,000
DICHLOROETHYLENE, CIS-1,2-	156-59-2	100,000	5,000
DICHLOROETHYLENE, TRANS-1,2-	156-60-5	100,000	10,000
DICHLOROMETHANE	75-09-2	100,000	8,000
DICHLOROPHENOL, 2,4-	120-83-2	100,000	9,000
DICHLOROPROPANE, 1,2-	78-87-5	100,000	10,000
DICHLOROPROPENE, 1,3-	542-75-6	2,000	10,000
DIELDRIN	60-57-1	80	40
DIETHYL PHTHALATE	84-66-2	100,000	10,000
DIMETHYL PHTHALATE	131-11-3	100,000	10,000
DIMETHYLPHENOL, 2,4-	105-67-9	100,000	10,000
DINITROPHENOL, 2,4-	51-28-5	100,000	9,000
DINITROTOLUENE, 2,4-	121-14-2	100,000	900
DIOXANE, 1,4-	123-91-1	100,000	5,000
ENDOSULFAN	115-29-7	100	5,000
ENDRIN	72-20-8	50	300
ETHYLBENZENE	100-41-4	100,000	10,000
ETHYLENE DIBROMIDE	106-93-4	100,000	500
FLUORANTHENE	206-44-0	2,000	10,000
FLUORENE	86-73-7	400	10,000
HEPTACHLOR	76-44-8	20	100
HEPTACHLOR EPOXIDE	1024-57-3	70	10
HEXACHLOROBENZENE	118-74-1	60,000	9
HEXACHLOROBUTADIENE	87-68-3	30,000	1,000
HEXACHLOROCYCLOHEXANE, GAMMA (gamma-HCH)	58-89-9	2,000	700
HEXACHLOROETHANE	67-72-1	100,000	3,000
HMX	2691-41-0	100,000	10,000
INDENO(1,2,3-cd)PYRENE	193-39-5	1,000	10,000
LEAD	7439-92-1	150	6,000
MERCURY	7439-97-6	200	400
METHOXYCHLOR	72-43-5	400	4,000
METHYL ETHYL KETONE	78-93-3	100,000	10,000
METHYL ISOBUTYL KETONE	108-10-1	100,000	10,000
METHYL MERCURY	22967-92-6	200	90
METHYL TERT BUTYL ETHER	1634-04-4	100,000	5,000
METHYLNAPHTHALENE, 2-	91-57-6	100,000	5,000
NAPHTHALENE	91-20-3	100,000	10,000
NICKEL	7440-02-0	2,000	10,000
PENTACHLOROPHENOL	87-86-5	2,000	800
PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS)***
PERFLUORODECANOIC ACID (PFDA)	335-76-2	100,000	4
PERFLUOROHEPTANOIC ACID (PFHpA)	375-85-9	100,000	4
PERFLUOROHEXANESULFONIC ACID (PFHxS)	355-46-4	5,000	4
PERFLUORONONANOIC ACID (PFNA)	375-95-1	100,000	4
PERFLUOROOCTANESULFONIC ACID (PFOS)	1763-23-1	5,000	4
PERFLUOROOCTANOIC ACID (PFOA)	335-67-1	100,000	4
PERCHLORATE	-	10,000	60
PETROLEUM HYDROCARBONS
TOTAL PETROLEUM HYDROCARBON [DAGGER]	NA	50,000	10,000
ALIPHATIC HYDROCARBONS
C5 through C8 Aliphatic Hydrocarbons	NA	100,000	5,000
C9 through C12 Aliphatic Hydrocarbons	NA	100,000	20,000
C9 through C18 Aliphatic Hydrocarbons	NA	100,000	20,000
C19 through C36 Aliphatic Hydrocarbons	NA	100,000	20,000
AROMATIC HYDROCARBONS
C9 through C10 Aromatic Hydrocarbons	NA	100,000	5,000
C11 through C22 Aromatic Hydrocarbons	NA	100,000	10,000
PHENANTHRENE	85-01-8	100,000	10,000
PHENOL	108-95-2	100,000	10,000
POLYCHLORINATED BIPHENYLS (PCBs)	1336-36-3	100	100
PYRENE	129-00-0	700	10,000
RDX	121-82-4	100,000	4,000
SELENIUM	7782-49-2	500	8,000
SILVER	7440-22-4	1,000	2,000
STYRENE	100-42-5	60,000	10,000
TETRACHLORODIBENZO-p-DIOXIN (TCDD), 2,3,7,8-(equivalents)	1746-01-6	4.E-01	6.E-04
TETRACHLOROETHANE, 1,1,1,2-	630-20-6	100,000	5,000
TETRACHLOROETHANE, 1,1,2,2-	79-34-5	100,000	5,000
TETRACHLOROETHYLENE	127-18-4	100,000	8,000
THALLIUM	7440-28-0	30,000	900
TOLUENE	108-88-3	100,000	10,000
TRICHLOROBENZENE, 1,2,4-	120-82-1	100,000	10,000
TRICHLOROETHANE, 1,1,1-	71-55-6	100,000	10,000
TRICHLOROETHANE, 1,1,2-	79-00-5	100,000	5,000
TRICHLOROETHYLENE	79-01-6	50,000	700
TRICHLOROPHENOL, 2,4,5-	95-95-4	100,000	10,000
TRICHLOROPHENOL 2,4,6-	88-06-2	50,000	4,000
VANADIUM	7440-62-2	40,000	8,000
VINYL CHLORIDE	75-01-4	100,000	1,000
XYLENES (Mixed Isomers)	1330-20-7	100,000	10,000
ZINC	7440-66-6	50,000	10,000
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 6 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.