(a)  This subchapter specifies the information and procedures necessary to demonstrate attainment with one or a combination of the background standard, Statewide health standard, site-specific standard and the minimum threshold standard, when a release of a regulated substance has occurred.

 (b)  This subchapter applies to persons who undertake a remediation in accordance with the act and this chapter.

 (c)  For purposes of determining attainment of one or a combination of remediation standards, the concentration of a regulated substance is not required to be less than the limits relating to the PQLs for a regulated substance in accordance with §  250.4 (relating to limits related to PQLs).

 (a)  Attainment of a standard shall be demonstrated with adherence to Data Quality Objectives (DQO) and Data Quality Assessment (DQA) processes as specified by the EPA, as appropriate. Attainment of the Statewide health or site-specific standard will apply to the vertical and horizontal extent of soil identified as contaminated from the release of a regulated substance above the selected standard and of groundwater at the point of compliance and beyond in a site characterization. Attainment of the background standard will apply to the vertical and horizontal extent of soil and water identified as contaminated from the release across the site. Where multiple releases occur on a property which produce distinctly separate zones of contamination, the characterization and subsequent attainment demonstrations apply individually to the separate zones.

 (b)  Demonstration of attainment in a final report shall include the following:

   (1)  A demonstration that the analysis of the data, through the application of statistical tests provided for in §  250.707 (relating to statistical tests), indicates that the standard has been met.

   (2)  For groundwater, a demonstration of a statistical time trend analysis, knowledge of the plume stability or other acceptable method that shows contaminant concentration at the point of compliance will not exceed the selected standard. A statistical analysis shall be applied that indicates continued attainment of the standard.

   (3)  For the site-specific standard, the following apply:

     (i)   If pathway elimination is part of the remediation, it shall be demonstrated on the basis of either an engineering or hydrogeologic analysis, or both, which includes fate and transport analysis that some or all of the exposure pathways have been eliminated.

     (ii)   If pathway elimination is not part of the remediation or it cannot be demonstrated that all pathways have been eliminated, it shall be demonstrated that the calculated numerical site-specific standards for the remaining pathways have been attained in accordance with paragraphs (1) and (2), using the procedures in §  250.707(c) and (d), or that the risk level remaining at a site does not exceed a risk level of 1 x 10^-4 and a hazard index of 1, provided for in the act. If separate phase liquids are present, it shall also be demonstrated that calculated site-specific numeric standards are attained within the soil and groundwater directly impacted by the separate phase liquids when those numeric standards are associated with exposure to separate phase liquids.

   (4)  For the background and Statewide health standards, if separate phase liquids are present, attainment at the point of compliance shall also be demonstrated within the soil and groundwater directly impacted by separate phase liquids.

 (a)  For any standard selected, the attainment demonstration for the soil media shall be made at the point of compliance as defined in Subchapters B—D (relating to background standards; Statewide health standards; and site-specific standards)

 (b)  The soil to which the attainment criteria are applied shall be determined by circumscribing with an irregular surface those concentrations detected during characterization which exceed the selected standard. Where this soil is to be removed from the site, the attainment demonstration applies to the base of the excavation defined by the limit of excavation.

 (c)  Sampling points for demonstration of attainment of soils shall be selected to be random and representative both horizontally and vertically based on a systematic random sampling as set forth in a Department approved reference. If exceedances of a standard occur in a localized area, the Department may require additional characterization and remediation if three or more adjacent samples exceed the standard by more than ten times.

 (d)  For statistical methods under §  250.707(b)(1)(i) (relating to statistical tests), the number of sample points required for each distinct area of contamination to demonstrate attainment shall be determined in the following way:

   (1)  For soil volumes equal to or less than 125 cubic yards, at least eight samples.

   (2)  For soil volumes up to 3,000 cubic yards, at least 12 sample points.

   (3)  For each additional soil volume of up to 3,000 cubic yards, an additional 12 sample points.

   (4)  Additional sampling points may be required based on site-specific conditions.

 (e)  For statistical methods under §  250.707(b)(1)(ii) and (c), the minimum number of samples required for demonstrating attainment shall be as specified by the documentation of the chosen method.

   The provisions of this §  250.703 amended November 23, 2001, effective November 24, 2001, 31 Pa.B. 6395. Immediately preceding text appears at serial pages (233694) to (233695).

 (a)  For any standard selected, the attainment demonstration for the groundwater media shall be made at the point of compliance as defined in Subchapters B—D (relating to background standards; Statewide health standards; and site-specific standards).

 (b)  A sufficient number and location of monitoring wells necessary to demonstrate attainment of each plume of contamination shall be installed at the point of compliance for each aquifer based on site-specific conditions. Well locations shall be selected to yield an adequate amount of water to produce statistically valid results.

 (c)  In cases where the site characterization has determined the groundwater contamination (plume) extends beyond the property boundary, and the concentration of regulated substances beyond the property is above the cleanup levels of the standard selected, then the location and number of wells shall determine compliance:

   (1)  At and beyond the property boundary.

   (2)  Within the area of property shown, in the site investigation report, to be contaminated with regulated substances above the selected standard.

 (d)  For statistical methods under §  250.707(b)(2)(i) (relating to statistical tests), the demonstration of attainment for groundwater shall be based on at least eight consecutive quarters of groundwater data. As an alternative, the Department may accept four consecutive quarterly sampling events or less with written approval from the Department under the following conditions:

   (1)  There is adequate spatial monitoring of the plume upgradient which indicates a decreasing concentration trend toward the downgradient property boundary.

   (2)  Parameters affecting the fate and transport of regulated substances within the plume have been fully evaluated.

   (3)  Concentrations of regulated substances in the plume at the point of compliance monitoring wells along the downgradient property boundary are all less than or equal to the groundwater standard or the limit relating to the PQL, whichever is higher, in all samples collected during the quarters of monitoring.

   (4)  One of the following requirements are met:

     (i)   The age of the plume is sufficiently well known to permit a judgment to be made regarding its stability.

     (ii)   The remediation includes source removal or containment actions which would reduce the chemical flux into the plume.

 (e)  For statistical methods under §  250.707(b)(2)(ii) and (c), the minimum number of samples required for demonstrating attainment shall be as specified by the documentation of the chosen method.

 In addition to sampling and statistical analyses that apply to attainment of the Statewide health standards for groundwater in this subchapter, attainment of the MSC for aquifers not used or currently planned to be used shall include the following:

   (1)  A scientifically valid and applicable fate and transport analysis, based on sufficient sampling and monitoring data to calibrate the model.

 (a)  For regulated substances which are naturally occurring, the person shall compare the analytical results of background reference samples, that are representative of naturally occurring concentrations of regulated substances on the site, with the analytical results of the medium of concern onsite. For nonnaturally occurring regulated substances for which a known background condition exists, the person shall compare the analytical results of background reference samples, which are related to the migration of contaminants onto the site, with the analytical results of the medium of concern onsite. In addition, application of statistical tests for the background standard shall be as follows:

   (1)  Soil. For soil, a person shall use one of the following statistical methods in subparagraphs (i)—(iii) and conditions relating to subparagraphs (i)—(iii) as described in subparagraphs (iv)—(vi) to demonstrate attainment of the background standard:

     (i)   The person shall demonstrate that the highest measurement from the area of concern is not greater than the highest measurement from the background area. The Department may accept insignificant variances in numbers. The minimum number of samples to be collected is ten from the background reference population and ten from each distinct area of contamination.

     (ii)   The Department may accept the use of a combination of the Wilcoxon rank-sum test (equivalent to the Mann-Whitney U test) and the quantile test for data from two populations. The application of these tests shall meet the criteria in subparagraphs (iv) and (vi).

     (iii)   The Department may accept other appropriate statistical methods that meet the requirements of subparagraphs (iv)—(vi).

     (iv)   For nonparametric and parametric methods under subparagraphs (ii) and (iii), the false-positive rate for a set of data applied to a statistical test may not be greater than 0.20. The minimum number of samples to be collected is ten from the background population and ten from each distinct area of contamination.

     (v)   For parametric methods under subparagraph (iii), the censoring level for each nondetect (ND) shall be the assigned value randomly generated that is between zero and the limit related to the PQL.

     (vi)   For nonparametric and parametric methods under subparagraphs (ii) and (iii), the application of a statistical method shall meet the criteria in subsection (d).

   (2)  Groundwater for known upgradient release of a regulated substance.

     (i)   The Department may accept the use of the nonparametric tolerance intervals that are applied in accordance with the procedures in subparagraphs (ii)—(vi) and (viii)—(x).

     (ii)   The upgradient concentration shall be determined by sampling in a background reference well shown on the basis of characterization to exhibit the highest concentration and by demonstrating that the groundwater is representative of concentrations in groundwater that are migrating onto the site.

     (iii)   The background reference well shall be sampled over a period of eight quarters to provide eight samples.

     (iv)   From these eight samples, the highest concentration for each regulated substance shall be selected as the upper tolerance limit.

     (v)   In each onsite well, eight samples shall also be collected during the same eight-quarter period.

     (vi)   The upper tolerance limit shall be met in each onsite well. The maximum of data collected from each onsite well shall be at or below the upper tolerance limit.

     (vii)   In lieu of subparagraphs (iv)—(vi), the Department may accept a retesting strategy using nonparametric prediction limit in accordance with current EPA guidance (EPA, Office of Solid Waste Management Division. ’’Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities;’’ Addendum to Interim Final Guidance, EPA, Washington, D. C. June 1992). For each regulated substance, the highest concentration of the eight background reference samples shall be selected as the upper prediction limit, as determined by the most current EPA guidance.

     (viii)   The application of a statistical method for groundwater background standard shall meet the criteria in subsection (d).

     (ix)   For parametric methods, the censoring level for each nondetect (ND) shall be the assigned value randomly generated that is between zero and the limit related to the PQL.

     (x)   In lieu of eight-quarter sampling in subparagraphs (iii) and (v), the Department may allow the eight samples to be taken during a period of four quarters, or less with written approval from the Department if the following criteria can be met:

       (A)   There is adequate spatial monitoring of the plume upgradient of the property on which the release occurred which indicates a stable plume condition.

       (B)   Parameters affecting the fate and transport of regulated substances within the plume have been fully evaluated.

       (C)   Coefficient of variation for the eight samples collected over a 4-quarter period may not exceed 1.0 for metals and 2.0 for organic compounds.

       (D)   The age of the plume is sufficiently well known to permit a judgement to be made regarding its stability and remediation of the souirce associated with the upgradient contamination is not currently or has not recently occurred.

   (3)  Background groundwater conditions due to naturally occurring or areawide contamination.

     (i)   To use this subparagraph for areawide contamination, the person performing remediation shall demonstrate to the Department, in writing, that the site conditions are due to areawide contamination and shall obtain the Department’s approval to use this subsection.

     (ii)   A minimum of 12 samples shall be collected from any combination of monitoring wells, including upgradient locations, if all data collected is used in determination of background concentrations.

     (iii)   The same number of samples shall be collected within and representative of the area of groundwater contamination (plume) onsite as were collected in the upgradient sampling for each sampling event.

     (iv)   The samples from the upgradient wells and the wells in the plume onsite shall be collected during the same sampling event.

     (v)   Sampling may be accelerated so that all sampling events occur in as short a period of time as possible so as not to result in serial correlation in the data.

     (vi)   The resulting values may be used with appropriate nonparametric or parametric methods to compare the two populations.

     (vii)   The sampling results in the plume onsite may not exceed the sum of the background arithmetic average and three times the standard deviation calculated for the background area.

     (viii)   The application of a statistical method for groundwater background standard shall meet the criteria in subsection (d).

     (ix)   For parametric methods, the censoring level for each nondetect (ND) shall be the assigned value randomly generated that is between zero and the limit related to the PQL.

 (b)  The following statistical tests may be accepted by the Department to demonstrate attainment of the Statewide health standard. The statistical test for soil shall apply to each distinct area of contamination. The statistical test for groundwater will apply to each compliance monitoring well. Testing shall be performed individually for each regulated substance identified in the final report site investigation as being present at the site for which a person wants relief from liability under the act. The application of a statistical method shall meet the criteria in subsection (d).

   (1)  For soil attainment determination at each distinct area of contamination, subparagraph (i), (ii) or (iii) shall be met in addition to the attainment requirements in § §  250.702 and 250.703 (relating to attainment requirements; and general attainment requirements for soil).

     (i)   Seventy-five percent of all samples, which shall be randomly collected in a single event from the site, shall be equal to or less than the Statewide health standard or the limit related to PQLs with no individual sample exceeding ten times the Statewide health standard.

     (ii)   As applied in accordance with EPA approved methods on statistical analysis of environmental data, as identified in subsection (e), the 95% UCL of the arithmetic mean shall be at or below the Statewide health standard.

     (iii)   For sites with a petroleum release where full site characterization, as defined in §  250.204(b) (relating to final report), has not been done in association with an excavation remediation, attainment of the Statewide health standard shall be demonstrated using the following procedure:

       (A)   For sites regulated under Chapter 245 (relating to administration of the storage tank and spill prevention program) where there is localized contamination as defined in the document ‘‘Closure Requirements for Underground Storage Tank Systems’’ (DEP technical document 2530-BK-DEP2008), samples shall be taken in accordance with that document.

       (B)   For sites not covered by clause (A), including all sites being remediated under an NIR under this chapter, samples shall be taken from the bottom and sidewalls of the excavation in a biased fashion that concentrates on areas where any remaining contamination above the Statewide health standard would most likely be found. The samples shall be taken from these suspect areas based on visual observation and the use of field instruments. If a sufficient number of samples has been collected from all suspect locations and the minimum number of samples has not been collected, or if there are no suspect areas, the locations to meet the minimum number of samples shall be based on a random procedure. The number of sample points required shall be determined in the following way:

         (I)   For 250 cubic yards or less of excavated contaminated soil, five samples shall be collected.

         (II)   For each additional 100 cubic yards of excavated contaminated soil, one sample shall be collected.

         (III)   For excavations involving more than 1,000 cubic yards of contaminated soil, the remediator shall identify the number and locations of samples in a confirmatory sampling plan submitted to the Department. The remediator shall obtain the Department’s approval of the confirmatory sampling plan prior to conducting attainment sampling.

         (IV)   Where water is encountered in the excavation and no obvious contamination is observed or indicated, soil samples collected just above the soil/water interface shall be equal to or less than the applicable Statewide health MSC determined by §  250.308(a)(2)(ii) (relating to soil to groundwater pathway numeric values).

         (V)   Where water is encountered in the excavation and no obvious contamination is observed or indicated, a minimum of two samples shall be collected from the water surface in the excavation.

       (C)   All sample results shall be equal to or less than the applicable Statewide health MSC as determined using Tables 1—4 and 6 in Appendix A.

     (iv)   For sites where there is a release to surface soils resulting in excavation of 50 cubic yards or less of contaminated soil, samples shall be collected as described in subparagraph (iii)(B), except that two samples shall be collected.

   (2)  For groundwater attainment determination at each compliance monitoring well, subparagraph (i) or (ii) shall be met in addition to the attainment requirements in §  250.702 and §  250.704 (relating to general attainment requirements for groundwater).

     (i)   Seventy-five percent of all samples collected within each monitoring well over time shall be equal to or less than the Statewide health standard or the limit related to PQLs with no individual sample exceeding both of the following:

       (A)   Ten times the Statewide health standard on the property.

       (B)   Two times the Statewide health standard beyond the property boundary.

     (ii)   As applied in accordance with EPA approved methods on statistical analysis of environmental data, as identified in subsection (e), the 95% UCL level of the arithmetic mean shall be at or below the Statewide health standard.

   (3)  In addition to the statistical tests identified in paragraphs (1) and (2), a person may use a statistical test that meets the requirements of subsection (d) to demonstrate attainment.

 (c)  To demonstrate attainment of the site-specific standard, a person may use a statistical test identified in subsection (b)(1)(ii) and (2)(ii) where the 95% UCL of the arithmetic mean is below the site-specific standard or a statistical test that meets the requirements of subsection (d). The attainment test and the methodology used in the risk assessment to evaluate exposure concentrations shall be the same.

 (d)  Except for the statistical methods identified in subsections (a)(1)(i) and (b)(1)(i) and (2)(i), a demonstration of attainment of one or a combination of remediation standards shall comply with the following:

   (1)  When statistical methods are to be used for demonstration of attainment of Statewide health or site-specific standards, the null hypotheses (Ho) shall be that the true site arithmetic average concentration is at or above the cleanup standard, and the alternative hypothesis (Ha) shall be that the true site arithmetic average concentration is below the cleanup standard. When statistical methods are to be used to determine that the background standard is exceeded, the null hypothesis (Ho) shall be that the background standard is achieved and the alternative hypothesis (Ha) shall be that the background standard is not achieved.

   (2)  A statistical method chosen shall comply with the following performance standards:

     (i)   The underlying assumptions of the statistical method shall be met, such as data distribution.

     (ii)   The statistical method shall be recommended for this use in Department-approved guidance or regulation and shall be generally recognized as appropriate for the particular remediation implemented at the site.

     (iii)   Compositing cannot be used with nonparametric methods or for volatile organic compounds.

     (iv)   For parametric methods, the censoring level for each nondetect shall be the assigned value randomly generated that is between zero and the limit related to the PQL.

     (v)   Tests shall account for seasonal and spatial variability as well as temporal correlation of data, unless otherwise approved by the Department.

     (vi)   Tests used to determine that the background standard is exceeded shall maintain adequate power to detect contamination in accordance with current EPA guidances, regulations or protocols.

     (vii)   For the limits relating to the PQLs, Statewide health and site-specific standards, the false-positive rate for a statistical test may not be greater than 0.20 for nonresidential and 0.05 for residential.

     (viii)   Statistical testing shall be done individually for each regulated substance present at the site.

   (3)  The following information shall be documented in a final report when a statistical method is applied:

     (i)   A description of the statistical method.

     (ii)   A clear statement of the applicable decision rule in the form of statistical hypotheses for each spatial unit and temporal boundary including the applicable statistical parameter of interest and the specific cleanup standard.

     (iii)   A description of the underlying assumptions of the method.

     (iv)   Documentation showing that the sample data set meets the underlying assumptions of the method and demonstrating that the method is appropriate to apply to the data.

     (v)   Specification of false positive rates and, in addition for the background standard, specification of false negative rates.

     (vi)   Documentation of input and output data for the statistical test, presented in tables or figures, or both, as appropriate.

     (vii)   An interpretation and conclusion of the statistical test.

 (e)  The references identified in subsection (b)(1)(ii) and (2)(ii) are as follows:

   (1)  EPA, Office of Policy, Planning and Evaluation, Methods for Evaluating the Attainment of Cleanup Standards, Volume 1: Soils and Solid Media, EPA 230/02-89-042, Washington, D. C. 1989.

   (2)  EPA, Office of Solid Waste Management Division, Test Methods for Evaluating Solid Waste, SW-846 Volume II: Field Methods, EPA, November 1985, Third Edition.

   (3)  EPA, Office of Solid Waste Management Division, Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities, Interim Final Guidance, EPA, Washington, D.C., April, 1989.

   (4)  EPA, Office of Solid Waste Management Division, Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities, Addendum to Interim Final Guidance, EPA, Washington, D.C., June, 1992.

   (5)  40 CFR 264 and 265 (relating to standards for owners and operators of hazardous waste treatment, storage, and disposal facilities; and interim status standards for owners and operators of hazardous waste treatment, storage, and disposal facilities).

   The provisions of this §  250.707 amended November 23, 2001, effective November 24, 2001, 31 Pa.B. 6395. Immediately preceding text appears at serial pages (233696) to (233702).

 (a)  After engineering controls are in place and the groundwater concentration levels have stabilized following any effects from the remediation, a statistical test shall be used to demonstrate that regulated substances in groundwater do not exceed the selected standard at the point of compliance. A statistical trend analysis, knowledge of the plume stability, or other acceptable method shall be used to demonstrate that contaminant concentration at the point of compliance will not exceed the selected standard in the future.

 (b)  If engineering or institutional controls are utilized at a site to maintain the nonresidential Statewide health standard or the site-specific standard, a postremediation care program shall be implemented to protect human health and the environment.

 (c)  A person implementing engineering controls shall ensure the ongoing achievement of the performance standards in order to maintain attainment.

 (d)  A person shall implement a postremediation care plan, as identified in an approved final report.

 (e)  A person may terminate postremediation care as approved in the final report if the person can demonstrate attainment under this chapter without the engineering controls in place, and document a fate and transport analysis that shows the standard will not be exceeded in the future.

APPENDIX A

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
ACENAPHTHENE	83-32-9	2,200	G	3,800	S	3,800	S	3,800	S	3,800	S	3,800	S
ACENAPHTHYLENE	208-96-8	2,200	G	6,100	G	16,000	S	16,000	S	16,000	S	16,000	S
ACEPHATE	30560-19-1	76	G	300	G	7,600	G	30,000	G	76	G	300	G
ACETALDEHYDE	75-07-0	19	N	52	N	1,900	N	5,200	N	19	N	52	N
ACETONE	67-64-1	3,700	G	10,000	G	370,000	G	1,000,000	G	37,000	G	100,000	G
ACETONITRILE	75-05-8	170	N	350	N	17,000	N	35,000	N	1,700	N	3,500	N
ACETOPHENONE	98-86-2	3,700	G	10,000	G	370,000	G	1,000,000	G	3,700	G	10,000	G
ACETYLAMINOFLUORENE, 2- (2AAF)	53-96-3	0.17	G	0.68	G	17	G	68	G	170	G	680	G
ACROLEIN	107-02-8	0.055	N	0.12	N	5.5	N	12	N	0.55	N	1.2	N

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
AMMONIA	7664-41-7	30,000	H	30,000	H	3,000,000	H	3,000,000	H	30,000	H	30,000	H
AMMONIUM SULFAMATE	7773-06-0	2,000	H	2,000	H	200,000	H	200,000	H	2,000	H	2,000	H
ANILINE	62-53-3	2.8	N	5.8	N	280	N	580	N	2.8	N	5.8	N
ANTHRACENE	120-12-7	66	S	66	S	66	S	66	S	66	S	66	S
ATRAZINE	1912-24-9	3	M	3	M	300	M	300	M	3	M	3	M
BAYGON (PROPOXUR)	114-26-1	3	H	3	H	300	H	300	H	3,000	H	3,000	H
BENOMYL	17804-35-2	1,800	G	2,000	S	2,000	S	2,000	S	1,800	G	2,000	S
BENTAZON	25057-89-0	1,100	G	3,100	G	110,000	G	310,000	G	1,100	G	3,100	G
BENZENE	71-43-2	5	M	5	M	500	M	500	M	500	M	500	M

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
BENZIDINE	92-87-5	0.0029	G	0.011	G	0.29	G	1.1	G	2.9	G	11	G
BENZO(A)ANTHRACENE	56-55-3	0.9	G	3.6	G	11	S	11	S	11	S	11	S
BENZO(A)PYRENE	50-32-8	0.2	M	0.2	M	3.8	S	3.8	S	3.8	S	3.8	S
BENZO(B)FLUORANTHENE	205-99-2	0.9	G	1.2	S	1.2	S	1.2	S	1.2	S	1.2	S
BENZO(GHI)PERYLENE	191-24-2	0.26	S	0.26	S	0.26	S	0.26	S	0.26	S	0.26	S
BENZO(K)FLUORANTHENE	207-08-9	0.55	S	0.55	S	0.55	S	0.55	S	0.55	S	0.55	S
BENZOIC ACID	65-85-0	150,000	G	410,000	G	2,700,000	S	2,700,000	S	150,000	G	410,000	G
BENZOTRICHLORIDE	98-07-7	0.051	G	0.2	G	5.1	G	20	G	51	G	200	G
BENZYL ALCOHOL	100-51-6	11,000	G	31,000	G	1,100,000	G	3,100,000	G	11,000	G	31,000	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
BENZYL CHLORIDE	100-44-7	0.87	N	3.7	N	87	N	370	N	87	N	370	N
BHC, ALPHA-	319-84-6	0.1	G	0.41	G	10	G	41	G	100	G	410	G
BHC, BETA-	319-85-7	0.37	G	1.4	G	37	G	100	S	100	S	100	S
BHC, DELTA-	319-86-8	22	G	61	G	2,200	G	6,100	G	8,000	S	8,000	S
BHC, GAMMA (LINDANE)	58-89-9	0.2	M	0.2	M	20	M	20	M	200	M	200	M
BIPHENYL, 1,1-	92-52-4	1,800	G	5,100	G	7,200	S	7,200	S	7,200	S	7,200	S
BIS(2-CHLOROETHYL)ETHER	111-44-4	0.13	N	0.55	N	13	N	55	N	13	N	55	N
BIS(2-CHLORO-ISOPROPYL)ETHER	108-60-1	300	H	300	H	30,000	H	30,000	H	30,000	H	30,000	H
BIS(CHLOROMETHYL)ETHER	542-88-1	0.00069	N	0.0029	N	0.069	N	0.29	N	0.069	N	0.29	N

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
BIS(2-ETHYLHEXYL) PHTHALATE	117-81-7	6	M	6	M	290	S	290	S	290	S	290	S
BISPHENOL A	80-05-7	1,800	G	5,100	G	120,000	S	120,000	S	120,000	S	120,000	S
BROMACIL	314-40-9	80	H	80	H	8,000	H	8,000	H	80	H	80	H
BROMOCHLOROMETHANE	74-97-5	90	H	90	H	9,000	H	9,000	H	90	H	90	H
BROMODICHLOROMETHANE	75-27-4	100	M	100	M	10,000	M	1,0000	M	100	M	100	M
BROMOMETHANE	74-83-9	10	H	10	H	1,000	H	1,000	H	1,000	H	1,000	H
BROMOXYNIL	1689-84-5	730	G	2,000	G	73,000	G	130,000	S	730	G	2,000	G
BROMOXYNIL OCTANOATE	1689-99-2	80	S	80	S	80	S	80	S	80	S	80	S
BUTADIENE, 1,3-	106-99-0	0.15	N	0.65	N	15	N	65	N	15	N	65	N

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
BUTYL ALCOHOL, N-	71-36-3	970	N	2,000	N	97,000	N	200,000	N	9,700	N	20,000	N
BUTYLATE	2008-41-5	350	H	350	H	35,000	H	35,000	H	350	H	350	H
BUTYLBENZENE, N-	104-51-8	1,500	G	4,100	G	15,000	S	15,000	S	1,500	G	4,100	G
BUTYLBENZENE, SEC-	135-98-8	1,500	G	4,100	G	17,000	S	17,000	S	1,500	G	4,100	G
BUTYLBENZENE, TERT-	98-06-6	1,500	G	4,100	G	30,000	S	30,000	S	1,500	G	4,100	G
BUTYLBENZYL PHTHALATE	85-68-7	2,700	S	2,700	S	2,700	S	2,700	S	2,700	S	2,700	S
CAPTAN	13-36-2	190	G	500	S	500	S	500	S	500	S	500	S
CARBARYL	63-25-2	700	H	700	H	70,000	H	70,000	H	120,000	S	120,000	S
CARBAZOLE	86-74-8	33	G	130	G	1,200	S	1,200	S	1,200	S	1,200	S

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
CARBOFURAN	1563-66-2	40	M	40	M	4,000	M	4,000	M	40	M	40	M
CARBON DISULFIDE	75-15-0	1,900	N	4,100	N	190,000	N	410,000	N	1,900	N	4,100	N
CARBON TETRACHLORIDE	56-23-5	5	M	5	M	500	M	500	M	50	M	50	M
CARBOXIN	5234-68-4	700	H	700	H	70,000	H	70,000	H	700	H	700	H
CHLORAMBEN	133-90-4	100	H	100	H	10,000	H	10,000	H	100	H	100	H
CHLORDANE	57-74-9	2	M	2	M	56	S	56	S	56	S	56	S
CHLORO-1,1-DIFLUOROETHANE, 1-	75-68-3	140,000	N	290,000	N	1,400,000	S	1,400,000	S	140,000	N	290,000	N
CHLORO-1-PROPENE, 3- (ALLYL CHLORIDE)	107-05-1	2.8	N	5.8	N	280	N	580	N	280	N	580	N
CHLOROACETOPHENONE, 2-	532-27-4	0.31	G	0.88	G	31	G	88	G	310	G	880	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
CHLOROANILINE, P-	106-47-8	150	G	410	G	15,000	G	41,000	G	150	G	410	G
CHLOROBENZENE	108-90-7	100	M	100	M	10,000	M	10,000	M	10,000	M	10,000	M
CHLOROBENZILATE	510-15-6	2.4	G	9.6	G	240	G	960	G	2,400	G	9,600	G
CHLOROBUTANE, 1-	109-69-3	15,000	G	41,000	G	680,000	S	680,000	S	15,000	G	41,000	G
CHLORODIBROMOMETHANE	124-48-1	100	M	100	M	10000	M	10000	M	10000	M	10000	M
CHLORODIFLUOROMETHANE	75-45-6	100	H	100	H	10,000	H	10,000	H	100	H	100	H
CHLOROETHANE	75-00-3	230	G	900	G	23,000	G	90,000	G	23,000	G	90,000	G
CHLOROFORM	67-66-3	100	M	100	M	10,000	M	10,000	M	1,000	M	1,000	M
CHLORONAPHTHALENE, 2-	91-58-7	2,900	G	8,200	G	12,000	S	12,000	S	2,900	G	8,200	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
CHLORONITROBENZENE, P-	100-00-5	37	G	140	G	3,700	G	14,000	G	37	G	140	G
CHLOROPHENOL, 2-	95-57-8	40	H	40	H	4,000	H	4,000	H	40	H	40	H
CHLOROPRENE	126-99-8	19	N	41	N	1,900	N	4,100	N	1,900	N	4,100	N
CHLOROPROPANE, 2-	75-29-6	280	N	580	N	28,000	N	58,000	N	280	N	580	N
CHLOROTHALONIL	1897-45-6	60	G	240	G	600	S	600	S	60	G	240	G
CHLOROTOLUENE, O-	95-49-8	100	H	100	H	10,000	H	10,000	H	100	H	100	H
CHLORPYRIFOS	2921-88-2	20	H	20	H	1,100	S	1100	S	20	H	20	H
CHLORSULFURON	64902-72-3	1,800	G	5,100	G	130,000	S	130,000	S	1,800	G	5,100	G
CHLORTHAL-DIMETHYL (DACTHAL) (DCPA)	1861-32-1	400	H	400	H	500	S	500	S	500	S	500	S

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
CHRYSENE	218-01-9	1.9	S	1.9	S	1.9	S	1.9	S	1.9	S	1.9	S
CRESOL	1319-77-3	180	G	510	G	18,000	G	51,000	G	18,000	G	51,000	G
CRESOL, 0- (METHYLPHENOL, 2-)	95-48-7	1,800	G	5,100	G	180,000	G	510,000	G	180,000	G	510,000	G
CRESOL, M (METHYLPHENOL, 3-)	108-39-4	1,800	G	5,100	G	180,000	G	510,000	G	1,800,000	G	2,500,000	S
CRESOL, P (METHYLPHENOL, 4-)	106-44-5	180	G	510	G	18,000	G	51,000	G	180,000	G	510,000	G
CRESOL, P-CHLORO-M-	59-50-7	180	G	510	G	18,000	G	51,000	G	180	G	510	G
CROTONALDEHYDE	4170-30-3	0.079	N	0.34	N	7.9	N	34	N	7.9	N	34	N
CROTONALDEHYDE, TRANS-	123-73-9	0.079	G	0.34	G	7.9	G	34	G	7.9	G	34	G
CUMENE	98-82-8	1,100	N	2,300	N	50,000	S	50,000	S	50,000	S	50,000	S

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
CYCLOHEXANONE	108-94-1	49,000	N	100,000	N	4,900,000	N	10,000,000	N	49,000	N	100,000	N
CYFLUTHRIN	68359-37-5	1	S	1	S	1	S	1	S	1	S	1	S
CYROMAZINE	66215-27-8	270	G	770	G	27,000	G	77,000	G	270	G	770	G
DDD, 4,4’-	72-54-8	0.62	N	2.7	N	62	N	160	S	62	N	160	S
DDE, 4,4’-	72-55-9	1.9	G	7.6	G	40	S	40	S	40	S	40	S
DDT, 4,4’-	50-29-3	1.9	G	5.5	S	5.5	S	5.5	S	5.5	S	5.5	S
DI(2-ETHYLHEXYL)ADIPATE	103-23-1	400	M	400	M	40,000	M	40,000	M	200,000	S	200,000	S
DIALLATE	2303-16-4	2.5	N	10	N	250	N	1,000	N	250	N	1,000	N
DIAMINOTOLUENE, 2,4-	95-80-7	0.21	G	0.81	G	21	G	81	G	210	G	810	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
DIAZINON	333-41-5	0.6	H	0.6	H	60	H	60	H	0.6	H	0.6	H
DIBENZO(A,H)ANTHRACENE	53-70-3	0.09	G	0.36	G	0.6	S	0.6	S	0.6	S	0.6	S
DIBROMO-3-CHLOROPROPANE, 1,2-	96-12-8	0.2	M	0.2	M	20	M	20	M	20	M	20	M
DIBROMOBENZENE, 1,4-	106-37-6	370	G	1,000	G	20,000	S	20,000	S	370	G	1,000	G
DIBROMOETHANE, 1,2- (ETHYLENE DIBROMIDE)	106-93-4	0.05	M	0.05	M	5	M	5	M	5	M	5	M
DIBROMOMETHANE	74-95-3	97	N	200	N	9,700	N	20,000	N	9,700	N	20,000	N
DIBUTYL PHTHALATE, N-	84-74-2	3,700	G	10,000	G	370,000	G	400,000	S	400,000	S	400,000	S
DICHLORO-2-BUTENE, 1,4-	764-41-0	0.016	N	0.069	N	1.6	N	6.9	N	0.016	N	0.069	N
DICHLOROBENZENE, 1,2-	95-50-1	600	M	600	M	60,000	M	60,000	M	60,000	M	60,000	M

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
DICHLOROBENZENE, 1,3-	541-73-1	600	H	600	H	60,000	H	60,000	H	60,000	H	6,0000	H
DICHLOROBENZENE, P-	106-46-7	75	M	75	M	7,500	M	7,500	M	7,500	M	7,500	M
DICHLOROBENZIDINE, 3,3’-	91-94-1	1.5	G	5.8	G	150	G	580	G	1,500	G	3,100	S
DICHLORODIFLUOROMETHANE (FREON 12)	75-71-8	1,000	H	1,000	H	100,000	H	100,000	H	100,000	H	100,000	H
DICHLOROETHANE, 1,1-	75-34-3	27	N	110	N	2700	N	11,000	N	270	N	1,100	N
DICHLOROETHANE, 1,2-	107-06-2	5	M	5	M	500	M	500	M	50	M	50	M
DICHLOROETHYLENE, 1,1-	75-35-4	7	M	7	M	700	M	700	M	70	M	70	M
DICHLOROETHYLENE, CIS-1,2-	156-59-2	70	M	70	M	7,000	M	7,000	M	700	M	700	M
DICHLOROETHYLENE, TRANS-1,2-	156-60-5	100	M	100	M	10,000	M	10,000	M	1,000	M	1,000	M

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
DICHLOROMETHANE (METHYLENE CHLORIDE)	75-09-2	5	M	5	M	500	M	500	M	500	M	500	M
DICHLOROPHENOL, 2,4-	120-83-2	20	H	20	H	2,000	H	2,000	H	20,000	H	20,000	H
DICHLOROPHENOXYACETIC ACID, 2,4- (2,4-D)	94-75-7	70	M	70	M	7,000	M	7,000	M	7,000	M	7,000	M
DICHLOROPROPANE, 1,2-	78-87-5	5	M	5	M	500	M	500	M	50	M	50	M
DICHLOROPROPENE, 1,3-	542-75-6	6.6	G	26	G	660	G	2,600	G	660	G	2,600	G
DICHLOROPROPIONIC ACID, 2,2- (DALAPON)	75-99-0	200	M	200	M	20,000	M	20,000	M	20,000	M	20,000	M
DICHLORVOS	62-73-7	0.52	N	2.2	N	52	N	220	N	0.52	N	2.2	N
DICYCLOPENTADIENE	77-73-6	0.55	N	1.2	N	55	N	120	N	0.55	N	1.2	N
DIELDRIN	60-57-1	0.041	G	0.16	G	4.1	G	16	G	41	G	160	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
DIETHYL PHTHALATE	84-66-2	5,000	H	5,000	H	500,000	H	500,000	H	1,100,000	S	1,100,000	S
DIFLUBENZURON	35367-38-5	200	S	200	S	200	S	200	S	200	S	200	S
DIMETHOATE	60-51-5	7.3	G	20	G	730	G	2,000	G	7,300	G	20,000	G
DIMETHOXYBENZIDINE, 3,3-	119-90-4	47	G	190	G	4,700	G	19,000	G	47,000	G	60,000	S
DIMETHYLAMINOAZOBENZENE, P-	60-11-7	0.14	G	0.57	G	14	G	57	G	140	G	570	G
DIMETHYLANILINE, N,N-	121-69-7	73	G	200	G	7,300	G	20,000	G	7,300	G	20,000	G
DIMETHYLBENZIDINE, 3,3-	119-93-7	0.072	G	0.28	G	7.2	G	28	G	72	G	280	G
DIMETHYLPHENOL, 2,4-	105-67-9	730	G	2,000	G	73,000	G	200,000	G	730,000	G	2,000,000	G
DINITROBENZENE, 1,3-	99-65-0	1	H	1	H	100	H	100	H	1,000	H	1,000	H

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
DINITROPHENOL, 2,4-	51-28-5	19	N	41	N	1,900	N	4,100	N	190	N	410	N
DINITROTOLUENE, 2,4-	121-14-2	2.1	G	8.4	G	210	G	840	G	2,100	G	8,400	G
DINITROTOLUENE, 2,6- (2,6-DNT)	606-20-2	37	G	100	G	3,700	G	10,000	G	37,000	G	100,000	G
DINOSEB	88-85-7	7	M	7	M	700	M	700	M	700	M	700	M
DIOXANE, 1,4-	123-91-1	5.6	N	24	N	560	N	2,400	N	56	N	240	N
DIPHENAMID	957-51-7	200	H	200	H	20,000	H	20,000	H	200	H	200	H
DIPHENYLAMINE	122-39-4	200	H	200	H	20,000	H	20,000	H	200,000	H	200,000	H
DIPHENYLHYDRAZINE, 1,2-	122-66-7	0.83	G	3.3	G	83	G	250	S	250	S	250	S
DIQUAT	85-00-7	20	M	20	M	2,000	M	2,000	M	20	M	20	M

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
DISULFOTON	298-04-4	0.3	H	0.3	H	30	H	30	H	30	H	30	H
DIURON	330-54-1	10	H	10	H	1,000	H	1,000	H	10	H	10	H
ENDOSULFAN	115-29-7	58	N	120	N	480	S	480	S	480	S	480	S
ENDOSULFAN I (ALPHA)	959-98-8	220	G	500	S	500	S	500	S	220	G	500	S
ENDOSULFAN II (BETA)	33213-65-9	220	G	450	S	450	S	450	S	220	G	450	S
ENDOSULFAN SULFATE	1031-07-8	120	S	120	S	120	S	120	S	120	S	120	S
ENDOTHALL	145-73-3	100	M	100	M	10,000	M	10,000	M	100	M	100	M
ENDRIN	72-20-8	2	M	2	M	200	M	200	M	2	M	2	M
EPICHLOROHYDRIN	106-89-8	2.8	N	5.8	N	280	N	580	N	280	N	580	N

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
ETHEPHON	16672-87-0	180	G	510	G	18,000	G	51,000	G	180	G	510	G
ETHION	563-12-2	18	G	51	G	850	S	850	S	18	G	51	G
ETHOXYETHANOL, 2- (EGEE)	110-80-5	550	N	1,200	N	55,000	N	120,000	N	55,000	N	120,000	N
ETHYL ACETATE	141-78-6	8,700	N	18,000	N	870,000	N	1,800,000	N	870,000	N	1,800,000	N
ETHYL ACRYLATE	140-88-5	3.1	N	13	N	310	N	1,300	N	310	N	1,300	N
ETHYL BENZENE	100-41-4	700	M	700	M	70,000	M	70,000	M	70,000	M	70,000	M
ETHYL DIPROPYLTHIOCARBAMATE, S- (EPTC)	759-94-4	910	G	2,600	G	91,000	G	260,000	G	910	G	2,600	G
ETHYL ETHER	60-29-7	1,900	N	4,100	N	190,000	N	410,000	N	1,900	N	4,100	N
ETHYL METHACRYLATE	97-63-2	870	N	1,800	N	87,000	N	180,000	N	870	N	1,800	N

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
ETHYLENE GLYCOL	107-21-1	14,000	H	14,000	H	1,400,000	H	14,000,000	H	1,400,000	H	1,400,000	H
ETHYLENE THIOUREA (ETU)	96-45-7	3	H	3	H	300	H	300	H	3,000	H	3,000	H
ETHYLP-NITROPHENYL PHENYLPHOSPHOROTHIOATE	2104-64-5	0.37	G	1	G	37	G	100	G	0.37	G	1	G
FENAMIPHOS	22224-92-6	2	H	2	H	200	H	200	H	2	H	2	H
FENVALERATE (PYDRIN)	51630-58-1	85	S	85	S	85	S	85	S	85	S	85	S
FLUOMETURON	2164-17-2	90	H	90	H	9,000	H	9,000	H	90	H	90	H
FLUORANTHENE	206-44-0	260	S	260	S	260	S	260	S	260	S	260	S
FLUORENE	86-73-7	1,500	G	1,900	S	1,900	S	1,900	S	1,900	S	1,900	S

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
FLUOROTRICHLOROMETHANE (FREON 11)	75-69-4	2,000	H	2,000	H	200,000	H	200,000	H	200,000	H	200,000	H
FONOFOS	944-22-9	10	H	10	H	1,000	H	1,000	H	10	H	10	H
FORMALDEHYDE	50-00-0	1,000	H	1,000	H	100,000	H	100,000	H	100,000	H	100,000	H
FORMIC ACID	64-18-6	19,000	N	41,000	N	1,900,000	N	4,100,000	N	190,000	N	410,000	N
FOSETYL-AL	39148-24-8	110,000	G	310,000	G	11,000,000	G	31,000,000	G	110,000	G	310,000	G
FURAN	110-00-9	9.7	N	20	N	970	N	2,000	N	970	N	2,000	N
FURFURAL	98-01-1	110	G	290	N	11,000	G	29,000	N	110	G	290	N
GLYPHOSATE	1071-83-6	700	M	700	M	70,000	M	70,000	M	700	M	700	M
HEPTACHLOR	76-44-8	0.4	M	0.4	M	40	M	40	M	180	S	180	S

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
HEPTACHLOR EPOXIDE	1024-57-3	0.2	M	0.2	M	20	M	20	M	200	M	200	M
HEXACHLOROBENZENE	118-74-1	1	M	1	M	6	S	6	S	6	S	6	S
HEXACHLOROBUTADIENE	87-68-3	1	H	1	H	100	H	100	H	1,000	H	1,000	H
HEXACHLOROCYCLOPENTADIENE	77-47-4	50	M	50	M	1,800	S	1,800	S	1,800	S	1,800	S
HEXACHLOROETHANE	67-72-1	1	H	1	H	100	H	100	H	100	H	100	H
HEXANE	110-54-3	550	N	1,200	N	9,500	S	9,500	S	550	N	1,200	N
HEXYTHIAZOX (SAVEY)	78587-05-0	500	S	500	S	500	S	500	S	500	S	500	S
HYDRAZINE/HYDRAZINE SULFATE	302-01-2	0.0088	N	0.038	N	0.88	N	3.8	N	0.088	N	0.38	N
HYDROQUINONE	123-31-9	1,500	G	4,100	G	150,000	G	410,000	G	1,500,000	G	4,100,000	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
INDENO(1,2,3-CD)PYRENE	193-39-5	0.9	G	3.6	G	62	S	62	S	62	S	62	S
IPRODIONE	36734-19-7	1,500	G	4,100	G	13,000	S	13,000	S	1,500	G	4,100	G
ISOBUTYL ALCOHOL	78-83-1	2,900	N	6,100	N	290,000	N	610,000	N	290,000	N	610,000	N
ISOPHORONE	78-59-1	100	H	100	H	10,000	H	10,000	H	100,000	H	100,000	H
KEPONE	143-50-0	0.041	G	0.16	G	4.1	G	16	G	41	G	160	G
MALATHION	121-75-5	100	H	100	H	10000	H	10000	H	10,000	H	10,000	H
MALEIC HYDRAZIDE	123-33-1	4,000	H	4,000	H	400,000	H	400,000	H	4,000	H	4,000	H
MANEB	12427-38-2	180	G	510	G	18,000	G	23,000	S	180	G	510	G
MERPHOS OXIDE	78-48-8	1.1	G	3.1	G	110	G	310	G	1.1	G	3.1	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
METHACRYLONITRILE	126-98-7	1.9	N	4.1	N	190	N	410	N	1.9	N	4.1	N
METHAMIDOPHOS	10265-92-6	1.8	G	5.1	G	180	G	510	G	1.8	G	5.1	G
METHANOL	67-56-1	4,900	N	10,000	N	490,000	N	1,000,000	N	490,000	N	1,000,000	N
METHOMYL	16752-77-5	200	H	200	H	20000	H	20000	H	200	H	200	H
METHOXYCHLOR	72-43-5	40	M	40	M	45	S	45	S	45	S	45	S
METHOXYETHANOL, 2-	109-86-4	37	G	100	G	3,700	G	10,000	G	37	G	100	G
METHYL ACETATE	79-20-9	37,000	G	100,000	G	3,700,000	G	10,000,000	G	37,000	G	100,000	G
METHYL ACRYLATE	96-33-3	1,100	G	3,100	G	110,000	G	310,000	G	110,000	G	310,000	G
METHYL CHLORIDE	74-87-3	3	H	3	H	300	H	300	H	300	H	300	H

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
METHYL ETHYL KETONE	78-93-3	2,800	N	5,800	N	280,000	N	580,000	N	280,000	N	580,000	N
METHYL ISOBUTYL KETONE	108-10-1	190	N	410	N	19,000	N	41,000	N	19,000	N	41,000	N
METHYL METHACRYLATE	80-62-6	1,900	N	4,100	N	190,000	N	410,000	N	190,000	N	410,000	N
METHYL METHANESULFONATE	66-27-3	6.7	G	26	G	670	G	2600	G	6.7	G	26	G
METHYL PARATHION	298-00-0	2	H	2	H	200	H	200	H	200	H	200	H
METHYL STYRENE (MIXED ISOMERS)	25013-15-4	220	G	610	G	22,000	G	61,000	G	220	G	610	G
METHYL TERT-BUTYL ETHER (MTBE)	1634-04-4	20	H	20	H	2,000	H	2,000	H	200	H	200	H
METHYLENE BIS(2-CHLOROANILINE), 4,4’-	101-14-4	5.1	G	20	G	510	G	2,000	G	5.1	G	20	G
METHYLNAPHTHALENE, 2-	91-57-6	730	G	2,000	G	25,000	S	25,000	S	730	G	2000	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
METHYLSTYRENE, ALPHA	98-83-9	680	N	1,400	N	68,000	N	140,000	N	680	N	1,400	N
NAPHTHALENE	91-20-3	100	H	100	H	10,000	H	10,000	H	30,000	S	30,000	S
NAPHTHYLAMINE, 1-	134-32-7	0.37	G	1.4	G	37	G	140	G	370	G	1,400	G
NAPHTHYLAMINE, 2-	91-59-8	0.37	G	1.4	G	37	G	140	G	370	G	1,400	G
NAPROPAMIDE	15299-99-7	3,700	G	10,000	G	70,000	S	70,000	S	3,700	G	10,000	G
NITROANILINE, M-	99-09-2	2.1	G	5.8	G	210	G	580	G	2.1	G	5.8	G
NITROANILINE, O-	88-74-4	2.1	G	5.8	G	210	G	580	G	2.1	G	5.8	G
NITROANILINE, P-	100-01-6	2.1	G	5.8	G	210	G	580	G	2.1	G	5.8	G
NITROBENZENE	98-95-3	18	G	51	G	1,800	G	5,100	G	18,000	G	51,000	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
NITROPHENOL, 2-	88-75-5	290	G	820	G	29,000	G	82,000	G	290,000	G	820,000	G
NITROPHENOL, 4-	100-02-7	60	H	60	H	6,000	H	6,000	H	60,000	H	60,000	H
NITROPROPANE, 2-	79-46-9	0.016	N	0.068	N	1.6	N	6.8	N	0.16	N	0.68	N
NITROSODIETHYLAMINE, N-	55-18-5	0.001	N	0.0043	N	0.1	N	0.43	N	0.01	N	0.043	N
NITROSODIMETHYLAMINE, N-	62-75-9	0.0031	N	0.013	N	0.31	N	1.3	N	0.031	N	0.13	N
NITROSO-DI-N-BUTYLAMINE, N-	924-16-3	0.027	N	0.11	N	2.7	N	11	N	2.7	N	11	N
NITROSODI-N-PROPYLAMINE, N-	621-64-7	0.094	G	0.37	G	9.4	G	37	G	94	G	370	G
NITROSODIPHENYLAMINE, N-	86-30-6	130	G	530	G	13,000	G	35,000	S	35,000	S	35,000	S
NITROSO-N-ETHYLUREA, N-	759-73-9	0.0047	G	0.019	G	0.47	G	1.9	G	0.47	G	1.9	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
OCTYL PHTHALATE, DI-N-	117-84-0	730	G	2,000	G	3,000	S	3,000	S	3,000	S	3,000	S
OXAMYL (VYDATE)	23135-22-0	200	M	200	M	20,000	M	20,000	M	200	M	200	M
PARATHION	56-38-2	220	G	610	G	20,000	S	20,000	S	220	G	610	G
PCB-1016 (AROCLOR)	12674-11-2	2.6	G	7.2	G	250	S	250	S	2.6	G	7.2	G
PCB-1221 (AROCLOR)	11104-28-2	1.3	G	5.2	G	130	G	520	G	1.3	G	5.2	G
PCB-1232 (AROCLOR)	11141-16-5	1.3	G	5.2	G	130	G	520	G	1.3	G	5.2	G
PCB-1242 (AROCLOR)	53469-21-9	1.3	G	5.2	G	100	S	100	S	1.3	G	5.2	G
PCB-1248 (AROCLOR)	12672-29-6	0.37	G	1.4	G	37	G	37	G	0.37	G	1.4	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
PCB-1254 (AROCLOR)	11097-69-1	0.37	G	1.4	G	37	G	37	G	0.37	G	1.4	G
PCB-1260 (AROCLOR)	11096-82-5	1.1	G	4.3	G	80	S	80	S	1.1	G	4.3	G
PEBULATE	1114-71-2	1,800	G	5,100	G	92,000	S	92,000	S	1,800	G	5,100	G
PENTACHLOROBENZENE	608-93-5	29	G	82	G	740	S	740	S	740	S	740	S
PENTACHLORONITROBENZENE	82-68-8	2.5	G	10	G	250	G	440	S	440	S	440	S
PENTACHLOROPHENOL	87-86-5	1	M	1	M	100	M	100	M	1,000	M	1,000	M
PHENACETIN	62-44-2	300	G	1,200	G	30,000	G	120,000	G	300,000	G	760,000	S
PHENANTHRENE	85-01-8	1,100	S	1,100	S	1,100	S	1,100	S	1,100	S	1,100	S
PHENOL	108-95-2	4,000	H	4,000	H	400,000	H	400,000	H	400,000	H	400,000	H

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
PHENYLENEDIAMINE, M-	108-45-2	220	G	610	G	22,000	G	61,000	G	220,000	G	610,000	G
PHENYLPHENOL, 2-	90-43-7	340	G	1,300	G	34,000	G	130,000	G	340,000	G	700,000	G
PHORATE	298-02-2	1.9	N	4.1	N	190	N	410	N	1.9	N	4.1	N
PHTHALIC ANHYDRIDE	85-44-9	73,000	G	200,000	G	6,200,000	S	6,200,000	S	6,200,000	S	6,200,000	S
PICLORAM	1918-02-1	500	M	500	M	50,000	M	50,000	M	500	M	500	M
POLYCHLORINATED BIPHENYLS (AROCLORS) (PCBS)	1336-36-3	0.5	M	0.5	M	50	M	50	M	0.5	M	0.5	M
PRONAMIDE	23950-58-5	50	H	50	H	5,000	H	5,000	H	50	H	50	H
PROPANIL	709-98-8	180	G	510	G	18,000	G	51,000	G	180	G	510	G
PROPHAM	122-42-9	730	G	2,000	G	73,000	G	200,000	G	730	G	2,000	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
PROPYLBENZENE, N-	103-65-1	1,500	G	4,100	G	52,000	S	52,000	S	1,500	G	4,100	G
PROPYLENE OXIDE	75-56-9	2.8	G	11	G	280	G	1,100	G	2.8	G	11	G
PYRENE	129-00-0	130	S	130	S	130	S	130	S	130	S	130	S
PYRIDINE	110-86-1	9.7	N	20	N	970	N	2,000	N	97	N	200	N
QUINOLINE	91-22-5	0.055	G	0.22	G	5.5	G	22	G	55	G	220	G
QUIZALOFOP (ASSURE)	76578-14-8	300	S	300	S	300	S	300	S	300	S	300	S
RONNEL	299-84-3	1,800	G	5,100	G	40,000	S	40,000	S	1,800	G	5,100	G
SIMAZINE	122-34-9	4	M	4	M	400	M	400	M	4	M	4	M
STRYCHNINE	57-24-9	11	G	31	G	1,100	G	3,100	G	11,000	G	31,000	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
STYRENE	100-42-5	100	M	100	M	10,000	M	10,000	M	10,000	M	10,000	M
TEBUTHIURON	34014-18-1	500	H	500	H	50,000	H	50,000	H	500	H	500	H
TERBACIL	5902-51-2	90	H	90	H	9,000	H	9,000	H	90	H	90	H
TERBUFOS	13071-79-9	0.9	H	0.9	H	90	H	90	H	0.9	H	0.9	H
TETRACHLOROBENZENE, 1,2,4,5-	95-94-3	11	G	31	G	580	S	580	S	580	S	580	S
TETRACHLORODIBENZO-P-DIOXIN, 2,3,7,8- (TCDD)	1746-01-6	0.00003	M	0.00003	M	0.003	M	0.003	M	0.019	S	0.019	S
TETRACHLOROETHANE, 1,1,1,2-	630-20-6	70	H	70	H	7,000	H	7,000	H	7,000	H	7,000	H
TETRACHLOROETHANE, 1,2,2,2-	79-34-5	0.3	N	0.3	N	30	N	30	N	30	N	30	N
TETRACHLOROETHYLENE (PCE)	127-18-4	5	M	5	M	500	M	500	M	50	M	50	M

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
TETRACHLOROPHENOL, 2,3,4,6-	58-90-2	290	N	610	N	29,000	N	61,000	N	29,000	N	61,000	N
TETRAETHYL LEAD	78-00-2	0.0037	G	0.01	G	0.37	G	1	G	3.7	G	10	G
TETRAETHYLDITHIOPYRO-PHOSPHATE	3689-24-5	4.9	N	10	N	490	N	1,000	N	4.9	N	10	N
THIOFANOX	39196-18-4	11	G	31	G	1,100	G	3,100	G	11	G	31	G
THIRAM	137-26-8	180	G	510	G	18,000	G	30,000	S	180	G	510	G
TOLUENE	108-88-3	1,000	M	1,000	M	100,000	M	100,000	M	100,000	M	100,000	M
TOLUIDINE, M-	108-44-1	2.8	G	11	G	280	G	1,100	G	2.8	G	11	G
TOLUIDINE, O	95-53-4	2.8	G	11	G	280	G	1,100	G	2,800	G	11,000	G
TOLUIDINE, P-	106-49-0	3.5	G	14	G	350	G	1,400	G	3.5	G	14	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
TOXAPHENE	8001-35-2	3	M	3	M	300	M	300	M	3	M	3	M
TRIALLATE	2303-17-5	470	G	1,300	G	4,000	S	4,000	S	470	G	1,300	G
TRIBROMOMETHANE (BROMOFORM)	75-25-2	100	M	100	M	10,000	M	10,000	M	1,000	M	1,000	M
TRICHLORO-1,2,2-TRIFLUOROETHANE, 1,1,2-	76-13-1	83,000	N	170,000	S	170,000	S	170,000	S	170,000	N	170,000	S
TRICHLOROBENZENE, 1,2,4-	120-82-1	70	M	70	M	7,000	M	7,000	M	44,000	S	44,000	S
TRICHLOROBENZENE, 1,3,5-	108-70-3	40	H	40	H	4,000	H	4000	H	40	H	40	H
TRICHLOROETHANE, 1,1,1-	71-55-6	200	M	200	M	20,000	M	20,000	M	2,000	M	2,000	M
TRICHLOROETHANE, 1,1,2-	79-00-5	5	M	5	M	500	M	500	M	50	M	50	M
TRICHLOROETHYLENE (TCE)	79-01-6	5	M	5	M	500	M	500	M	50	M	50	M

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
TRICHLOROPHENOL, 2,4,5-	95-95-4	3,700	G	10,000	G	370,000	G	1,000,000	G	100,000	S	1,000,000	S
TRICHLOROPHENOL, 2,4,6-	88-06-2	11	G	31	G	1,100	G	3,100	G	11,000	G	31,000	G
TRICHLOROPHENOXYACETIC ACID, 2,4,5- (2,4,5-T)	93-76-5	70	H	70	H	7,000	H	7,000	H	70,000	H	70,000	H
TRICHLOROPHENOXYPROPIONIC ACID, 2,4,5- (2,4,5-TP)	93-72-1	50	M	50	M	5,000	M	5,000	M	50	M	50	M
TRICHLOROPROPANE, 1,1,2-	598-77-6	180	G	510	G	18,000	G	51,000	G	180	G	510	G
TRICHLOROPROPANE, 1,2,3-	96-18-4	40	H	40	H	4,000	H	4000	H	4,000	H	4,000	H
TRICHLOROPROPENE, 1,2,3-	96-19-5	180	G	510	G	18,000	G	51,000	G	180	G	510	G
TRIFLURALIN	1582-09-8	5	H	5	H	500	H	500	H	5	H	5	H
TRIMETHYLBENZENE, 1,3,4- (TRIMETHYLBENZENE, 1,2,4-)	95-63-6	16	N	35	N	1,600	N	3,500	N	1,600	N	3,500	N

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

TABLE 1—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR ORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
TRIMETHYLBENZENE, 1,3,5-	108-67-8	16	N	35	N	1,600	N	3,500	N	16	N	35	N
TRINITROTOLUENE, 2,4,6-	118-96-7	2	H	2	H	200	H	200	H	2	H	2	H
VINYL ACETATE	108-05-4	550	N	1200	N	55,000	N	120,000	N	550	N	1,200	N
VINYL BROMIDE (BROMOETHENE)	593-60-2	1.4	N	5.8	N	140	N	580	N	14	N	58	N
VINYL CHLORIDE	75-01-4	2	M	2	M	200	M	200	M	20	M	20	M
WARFARIN	81-81-2	11	G	31	G	1,100	G	3,100	G	11,000	G	17,000	S
XYLENES (TOTAL)	1330-20-7	10,000	M	10,000	M	180,000	S	180,000	S	180,000	S	180,000	S
ZINEB	12122-67-7	1,800	G	5,100	G	10,000	S	10,000	S	1,800	G	5,100	G

   All concentrations in µg/L
R = Residential
NR = Non-Residential
M = Maximum Contaminant Level
H = Lifetime health advisory level
G = Ingestion
N = Inhalation
S = Aqueous solubility cap

APPENDIX A

TABLE 2—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR INORGANIC REGULATED SUBSTANCES IN GROUNDWATER

   All concentrations in µg/L (except asbestos)
M = Maximum Contaminant Level
H = Lifetime Health Advisory Level
SMCL = Secondary Maximum Contaminant Level
G = Ingestion
N = Inhalation

TABLE 2—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR INORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
COBALT	7440-48-4	730	G	2,000	G	73,000	G	200,000	G	73,000	G	200,000	G
COPPER	7440-50-8	1,000	M	1,000	M	100,000	M	100,000	M	1,000,000	M	1,000,000	M
CYANIDE, FREE	57-12-5	200	M	200	M	20,000	M	20,000	M	200,000	M	200,000	M
LEAD	7439-92-1	5	M	5	M	500	M	500	M	5,000	M	5,000	M
MERCURY	7439-97-6	2	M	2	M	200	M	200	M	2,000	M	2,000	M
NICKEL	7440-02-0	100	H	100	H	10,000	H	10,000	H	100,000	H	100,000	H
NITRATE NITROGEN	14797-55-8	10,000	M	10,000	M	1,000,000	M	1,000,000	M	10,000,000	M	10,000,000	M
NITRITE NITROGEN	14797-65-0	1,000	M	1,000	M	100,000	M	100,000	M	1,000,000	M	1,000,000	M
SELENIUM	7782-49-2	50	M	50	M	5,000	M	5,000	M	50,000	M	50,000	M

   All concentrations in µg/L (except asbestos)
M = Maximum Contaminant Level
H = Lifetime Health Advisory Level
SMCL = Secondary Maximum Contaminant Level
G = Ingestion
N = Inhalation

TABLE 2—MEDIUM-SPECIFIC CONCENTRATIONS (MSCs) FOR INORGANIC REGULATED SUBSTANCES IN GROUNDWATER—(Continued)

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
SILVER	7440-22-4	100	H	100	H	10,000	H	10,000	H	100,000	H	100,000	H
SULFATE		500,000	M	500,000	M	50,000,000	M	50,000,000	M	500,000,000	M	500,000,000	M
THALLIUM	7440-28-0	2	M	2	M	200	M	200	M	2,000	M	2,000	M
TIN	7440-31-5	22,000	G	61,000	G	2,200,000	G	6,100,000	G	22,000,000	G	61,000,000	G
VANADIUM	7440-62-2	260	G	720	G	26,000	G	72,000	G	260,000	G	720,000	G
ZINC AND COMPOUNDS	7440-66-6	2,000	H	2,000	H	200,000	H	200,000	H	2,000,000	H	2,000,000	H

 Secondary Contaminants