S.D. Admin. R. 74:54:01:04
The following standards are the allowable pH range and maximum allowable concentration in groundwater of 10,000 mg/L TDS concentration or less for the contaminants specified unless the ambient condition exceeds the standards. Regardless of whether there is one contaminant or more than one contaminant present in groundwater, when the ambient pH or concentration of any water contaminant exceeds the standard specified in this section, the ambient pH or concentration is the allowable limit, provided that the discharge at such concentrations will not result for the present or the reasonably foreseeable future in concentrations at any place of groundwater withdrawal in excess of the standards in this section.
These standards apply to the dissolved portion of the contaminants specified, with the exception of mercury and the organic compounds, using the definition of "dissolved" given in the publication Methods and Guidance for the Analysis of Water, Version 2, June 1999. The standards for mercury and the organic compounds apply to the total unfiltered concentrations of the contaminants.
Groundwater must meet the standards listed as follows unless otherwise provided by chapters 74:54:01 and 74:54:02:
TABLE ONE
Human Health Standards
CONTAMINANT | CAS NUMBER | CONCENTRATION |
ORGANICS | ||
Alachlor | 15972-60-8 | 0.002 mg/L |
Aldicarb | 116-06-3 | 0.003 mg/L |
Aldicarb Sulfone | 1646-87-4 | 0.002 mg/L |
Aldicarb Sulfoxide | 1646-87-3 | 0.004 mg/L |
Atrazine | 1912-24-9 | 0.003 mg/L |
Benzene | 71-43-2 | 0.005 mg/L |
Benzo[a]pyrene | 50-32-8 | 0.0002 mg/L |
Cabofuran | 1563-66-2 | 0.04 mg/L |
Carbon tetrachloride | 56-23-5 | 0.005 mg/L |
Chlordane | 57-74-9 | 0.002 mg/L |
2,4-D (2,4-dichlorophenoxyacetic acid) | 94-75-7 | 0.07 mg/L |
Dalapon (sodium salt) | 75-99-0 | 0.2 mg/L |
Di(2-ethylhexyl)adipate | 103-23-1 | 0.4 mg/L |
Di(2-ethylhexyl)phthalate | 117-81-7 | 0.006 mg/L |
Dibromochloropropane (DBCP) | 96-12-8 | 0.0002 mg/L |
o-Dichlorobenzene | 95-50-1 | 0.6 mg/L |
p-Dichlorobenzene | 106-46-7 | 0.075 mg/L |
1,2-Dichloroethane | 107-06-2 | 0.005 mg/L |
1,1-Dichloroethylene | 75-35-4 | 0.007 mg/L |
cis 1,2-Dichloroethylene | 156-59-2 | 0.07 mg/L |
trans 1,2-Dichloroethylene | 156-60-5 | 0.1 mg/L |
Dichloromethane (Methylene chloride) | 75-09-2 | 0.005 mg/L |
1,2 Dichloropropane | 78-87-5 | 0.005 mg/L |
Dinoseb | 88-85-7 | 0.007 mg/L |
Diquat | 85-00-7 | 0.02 mg/L |
Endothall | 145-73-3 | 0.1 mg/L |
Endrin | 72-20-8 | 0.002 mg/L |
Ethylbenzene | 100-41-4 | 0.7 mg/L |
Ethylene dibromide (EDB) | 106-93-4 | 0.00005 mg/L |
Glyphosate | 1071-53-6 | 0.7 mg/L |
Heptachlor | 76-44-8 | 0.0004 mg/L |
Heptachlor epoxide | 1024-57-3 | 0.0002 mg/L |
Hexachlorobenzene | 188-74-1 | 0.001 mg/L |
Hexachlorocyclopentadiene | 77-47-4 | 0.05 mg/L |
Total Haloacetic Acids, including: | ||
Dichloroacetic acid | 76-43-6 | |
Monochloroacetic acid | 79-11-8 | 0.06 mg/L |
Trichloroacetic acid | 76-03-9 | |
Lindane | 58-89-9 | 0.0002 mg/L |
Methoxychlor | 72-43-5 | 0.04 mg/L |
Monochlorobenzene | 108-90-7 | 0.1 mg/L |
Oxamyl (Vydate) | 23135-22-0 | 0.2 mg/L |
Pentachlorophenol | 87-86-5 | 0.001 mg/L |
Picloram | 1918-02-1 | 0.5 mg/L |
Polychlorinated biphenyls (PCBs) | 1336-36-3 | 0.0005 mg/L |
Simazine | 122-34-9 | 0.004 mg/L |
Styrene | 100-42-5 | 0.1 mg/L |
2,3,7,8-TCDD (Dioxin) | 1746-01-6 | 0.00000003 mg/L (3 x 10-8 mg/L) |
Tetrachloroethylene (PCE) | 127-18-4 | 0.005 mg/L |
Toluene | 108-88-3 | 1 mg/L |
Total petroleum hydrocarbons | NA | 10 mg/L1 |
Toxaphene | 8001-35-2 | 0.003 mg/L |
2,4,5-TP Silvex | 93-72-1 | 0.05 mg/L |
1,2,4-Trichlorobenzene | 120-82-1 | 0.07 mg/L |
1,1,1-Trichloroethane | 71-55-6 | 0.2 mg/L |
1,1,2-Trichloroethane | 79-00-5 | 0.005 mg/L |
Total trihalomethanes, including: | ||
bromodichloromethane, | 75-27-4 | |
bromoform (tribromomethane), | 75-25-2 | 0.08 mg/L |
chloroform (trichloromethane), | 67-66-3 | |
and dibromochloromethane | 124-48-1 | |
(chlorodibromomethane) | ||
Trichloroethylene | 79-01-6 | 0.005 mg/L |
Vinyl chloride | 75-01-4 | 0.002 mg/L |
Xylenes (total) | 1330-20-7 | 10 mg/L |
INORGANICS | ||
Antimony | 7440-36-0 | 0.006 mg/L |
Arsenic | 7440-38-2 | 0.01 mg/L2 |
Asbestos | 1332-21-4 | 7 MFL (longer than 10 micrometers) |
Barium | 7440-39-3 | 2 mg/L |
Beryllium | 7440-41-7 | 0.004 mg/L |
Bromate | 7789-38-0 | 0.01 mg/L |
Cadmium (Cd) | 7440-43-9 | 0.005 mg/L |
Chlorite | 7758-19-2 | 1 mg/L |
Chromium | 7440-47-3 | 0.1 mg/L |
Copper (Cu) | 7440-50-8 | 1.0 mg/L |
Cyanide (CN) as free cyanide | 143-33-9 | 0.2 mg/L |
Cyanine (CN) as weak acid dissociable | 143-33-9 | 0.75 mg/L |
Fluoride (F) | 7681-49-4 | 4 mg/L |
Lead (Pb) | 7439-92-1 | 0.015 mg/L |
Mercury (Hg) | 7487-94-7 | 0.002 mg/L |
Nitrate (as N) | 14797-55-8 | 10 mg/L |
Nitrite (as N) | 14797-65-0 | 1 mg/L |
Nitrate + Nitrite (both as N) | NA | 10 mg/L |
Selenium | 7782-49-2 | 0.05 mg/L |
Silver | 7440-22-4 | 0.1 mg/L |
Thallium | 7440-28-0 | 0.002 mg/L |
RADIONUCLIDES | ||
Beta particle and photon radioactivity (from man-made radionuclides) | NA | 4 mrem/yr |
Gross alpha particle activity, excluding radon and uranium | NA | 15 pCi/l |
Radium 226 & radium 228 combined | 7440-14-4 | 5 pCi/l |
Radon | 10043-92-2 | 300 pCi/l |
Uranium | 7440-61-1 | 0.03 mg/L |
MICROBIOLOGY | ||
Fecal coliform bacteria | NA | Less than 2.2 organisms per 100 mL (MPN) |
1 If Total Petroleum Hydrocarbons is between 0.1 mg/L and 10 mg/L, and is within the radius of influence of a well or within Zone A of a delineated wellhead protection area, clean up must continue until 0.1 mg/L is met. Total petroleum hydrocarbons must be analyzed using the California Department of Health Services Method published in "Leaking Underground Fuel Tank Field Manual: Guidelines for Site Assessment, Cleanup, and Underground Storage Tank Closure," October 1989, or its equivalent.
2 Ground Water Discharge Plans with permitted allowable limits for arsenic issued before the effective date of these ground water quality standard revisions are exempt.
TABLE TWO
Other standards that are not applicable to groundwater receiving discharge from publicly owned treatment works.
CONTAMINANT | CAS NUMBER | CONCENTRATION |
Chloride | 7647-14-5 | 250 mg/L |
pH | NA | 6.5-8.5 |
Sulfate | 7757-82-6 | 500 mg/L |
TDS | NA | 1000 mg/L |
If the standards in either table one or table two are exceeded by ambient groundwater quality, the ambient water quality becomes the maximum allowable limit, as determined in § 74:54:02:18, for an approved groundwater discharge plan.
S.D. Admin. R. 74:54:01:04
General Authority: SDCL 34A-2-11.
Law Implemented: SDCL 34A-2-10, 34A-2-11.
Methods and Guidance for the Analysis of Water, Version 2, June 1999; NTIS Order No. PB99-500209, published by the U.S. Environmental Protection Agency. Copies are available on CD-ROM from the National Technical Information Service (NTIS), 5285 Port Royal Road, Springfield, Virginia 22161, 703-605-6000. The cost is $85. "Leaking Underground Fuel Tank Field Manual: Guidelines for Site Assessment, Cleanup, and Underground Storage Tank Closure," October 1989, State Water Resources Control Board, P.O. Box 100, Sacramento, CA, 95812, 916-341-5250. Copies of the document are available online at: www.swrcb.ca.gov/general/publications/index.html. Organic chemicals, § 74:04:05:06. Radionuclides, § 74:04:05:17. 40 C.F.R. § 141.11 (40 FR 59570, December 24, 1975, as amended at 45 FR 57342, August 27, 1980; 47 FR 10998, March 12, 1982; 51 FR 11410, April 2, 1986; 56 FR 30274, July 1, 1991; 56 FR 32113, July 15, 1991; 60 FR 33932, June 29, 1995; 65 FR 26022, May 4, 2000; 66 FR 7061, January 22, 2001). 40 C.F.R. § 141.12 (63 FR 69463, December 16, 1998, as amended at 66 FR 3776, January 16, 2001). 40 C.F.R. § 141.24 (40 FR 59570, December 24, 1975, as amended at 44 FR 68641, November 29, 1979; 45 FR 57345, August 27, 1980; 47 FR 10998, March 12, 1982; 52 FR 25712, July 8, 1987; 53 FR 5147, February 19, 1988; 53 FR 25110, July 1988; 56 FR 3583, January 30, 1991; 56 FR 30277, July 1, 1991; 57 FR 22178, May 27, 1992; 57 FR 31841, July 17, 1992; 59 FR 34323, July 1, 1994; 59 FR 62468, December 5, 1994; 60 FR 34085, June 29, 1995; 64 FR 67464, December 1, 1999; 65 FR 26022, May 4, 2000; 67 FR 65250, October 23, 2002; 67 FR 65898, October 29, 2002). 40 C.F.R. § 141.60 (56 FR 3593, January 30, 1991, as amended at 57 FR 31846, July 17, 1992; 59 FR 34324, July 1, 1994; 66 FR 7063, January 22, 2001). 40 C.F.R. § 141.61 (56 FR 3593, January 30, 1991, as amended at 56 FR 30280, July 1, 1991; 57 FR 31846, July 17, 1992; 59 FR 34324, July 1, 1994). 40 C.F.R. § 141.62 (56 FR 3594, January 30, 1991, as amended at 56 FR 30280, July 1, 1991; 57 FR 31847, July 17, 1992; 59 FR 34325, July 1, 1994; 60 FR 33932, June 29, 1995; 66 FR 7063, January 22, 2001; 68 FR 14506, March 25, 2003). 40 C.F.R. § 141.63 (54 FR 27566, June 29, 1989; 55 FR 25064, June 19, 1990, as amended at 65 FR 26022, May 4, 2000). 40 C.F.R. § 141.64 (FR 69465, December 16, 1998, as amended at 66 FR 3776, January 16, 2001). 40 C.F.R. § 141.66 (65 FR 76748, December 7, 2000). 40 C.F.R. § 143.3 (44 FR 42198, July 19, 1979, as amended at 51 FR 11412, April 2, 1986; 56 FR 3597, January 30, 1991).