Appendix A.

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

REGULATED		USED AQUIFERS								NON-USE AQUIFERS
SUBSTANCE	CASRN	TDS ‹= 2500				TDS › 2500
		R		NR		R		NR		R		NR
ANTIMONY	7440-36-0	6	M	6	M	600	M	600	M	6,000	M	6,000	M
ARSENIC	7440-38-2	10	M	10	M	1,000	M	1,000	M	10,000	M	10,000	M
ASBESTOS (fibers/L)	12001- 29-5	7,000,000	M	7,000,000	M	7,000,000	M	7,000,000	M	7,000,000	M	7,000,000	M
BARIUM AND COMPOUNDS	7440-39-3	2,000	M	2,000	M	200,000	M	200,000	M	2,000,000	M	2,000,000	M
BERYLLIUM	7440-41-7	4	M	4	M	400	M	400	M	4,000	M	4,000	M
BORON AND COMPOUNDS	7440-42-8	6,000	H	6,000	H	600,000	H	600,000	H	6,000,000	H	6,000,000	H
CADMIUM	7440-43-9	5	M	5	M	500	M	500	M	5,000	M	5,000	M
CHROMIUM, TOTAL	7440-47-3	100	M	100	M	10,000	M	10,000	M	100,000	M	100,000	M
COBALT	7440-48-4	11	G	31	G	1,100	G	3,100	G	11,000	G	31,000	G

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
R = Residential
NR = Non Residential

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
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
FLUORIDE	16984-48-8	4,000	M	4,000	M	400,000	M	400,000	M	4,000,000	M	4,000,000	M
LEAD	7439-92-1	5	M	5	M	500	M	500	M	5,000	M	5,000	M
LITHIUM	7439-93-2	73	G	200	G	7,300	G	20,000	G	73,000	G	200,000	G
MANGANESE	7439-96-5	300	H	300	H	30,000	H	30,000	H	300,000	H	300,000	H
MERCURY	7439-97-6	2	M	2	M	200	M	200	M	2,000	M	2,000	M
MOLYBDENUM	7439-98-7	40	H	40	H	4,000	H	4,000	H	40,000	H	40,000	H
NICKEL	7440-02-0	100	H	100	H	10,000	H	10,000	H	100,000	H	100,000	H

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
R = Residential
NR = Non Residential

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
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
PERCHLORATE	7790-98-9	15	H	15	H	1,500	H	1,500	H	15,000	H	15,000	H
SELENIUM	7782-49-2	50	M	50	M	5,000	M	5,000	M	50,000	M	50,000	M
SILVER	7440-22-4	100	H	100	H	10,000	H	10,000	H	100,000	H	100,000	H
THALLIUM	7440-28-0	2	M	2	M	200	M	200	M	2,000	M	2,000	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
R = Residential
NR = Non Residential

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

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
REGULATED SUBSTANCE	CASRN	SMCL	UNITS
ALUMINUM	7429-90-5	200	µg/L
CHLORIDE	7647-14-5	250,000	µg/L
FLUORIDE	7681-49-4	2,000	µg/L
IRON	7439-89-6	300	µg/L
MANGANESE	7439-96-5	50	µg/L
SULFATE	7757-82-6	250,000	µg/L

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
R = Residential
NR = Nonresidential