S.C. Code Regs. § § 61-58.5.T
Current through Register Vol. 48, 12, December 27, 2024
Section 61-58.5.T - Special Monitoring for Inorganic and Organic Contaminants(1) All community and non-transient non-community water supply systems shall conduct special monitoring for the following contaminants. Systems serving 10,000 or fewer persons are not required to monitor for the contaminants in the section after December 31, 1998. Chloroform | 1,3-Dichloropropane |
Bromodichloromethane | Chloromethane |
Chlorodibromomethane | Bromomethane |
Bromoform | 1,2,3-Trichloropropane |
Chlorobenzene | 1,1,1,2-Tetrachloroethane |
m-Dichlorobenzene | Chloroethane |
2,2-Dichloropropane | 1,1-Dichloropropene |
o-Chlorotoluene | 1,1-Dichloroethane |
Bromobenzene | 1,1,2,2-Tetrachloroethane |
1,3-Dichloropropene | p-Chlorotoluene |
(2) Monitoring for the organic compounds listed in paragraph (1) of this section, shall begin no later than the date specified below: Population Served | Initial Monitoring Date |
>10,000 | No later than January 1, 1988 |
3,300-10,000 | No later than January 1, 1989 |
<3,300 | No later than January 1, 1991 |
(3) Surface water systems shall sample at points in the distribution system representative of each water source or at entry points to the distribution system after any application of treatment. The minimum number of samples is one year of quarterly samples per water source.(4) Ground water systems shall sample at points of entry to the distribution system representative of each well after any application of treatment. The minimum number of samples is one (1) sample per entry point to the distribution system.(5) The Department may require confirmation samples for positive or negative results.(7) Analysis under this section shall be conducted using EPA-approved methods listed in 40 CFR 141.(8) Analysis under this section shall only be performed by laboratories which are certified by the Department.(9) Public water systems may use monitoring data collected any time after January 1, 1983, to meet the requirements of paragraph (1) of this section, provided that the monitoring program was consistent with the requirements of this section. In addition, the results of EPA's Ground Water Supply Survey may be used in a similar manner for systems supplied by a single well.(10) At the Department's discretion, community water systems and non-transient non-community water systems may be required to conduct special monitoring for the following contaminants: 1,2,4-Trimethylbenzene | p-Isopropyltoluene |
1,2,4-Trichlorobenzene | Isopropylbenzene |
1,2,3-Trichlorobenzene | Tert-butylbenzene |
n-Propylbenzene | Sec-butylbenzene |
n-Butylbenzene | Fluorotrichloromethane |
Naphthalene | Dichlorodifluoromethane |
Hexachlorobutadiene | Bromochloromethane |
1,3,5-Trimethylbenzene |
(11) All community and non-transient non-community water systems shall repeat the monitoring required by this Section no less frequently than every five (5) years from the dates specified in paragraph (2) of this section.(12) The Department or public water systems may composite up to five samples when monitoring for the organic contaminants in paragraphs (1) and (10) of this section.(13) Monitoring of the contaminants listed in paragraphs (13)(k) and (l) of this section, shall be conducted as follows: (a) Each community and non-transient, non-community water system shall take four consecutive quarterly samples at each sampling point for each contaminant listed in paragraph (13)(k) of this section and report the results to the Department. Monitoring must be completed by December 31, 1995.(b) Each community and non-transient non-community water system shall take one sample at each sampling point for each contaminant listed in paragraph (13)(l) of this section and report the results to the Department. Monitoring must be completed by December 31, 1995.(c) Each community and non-transient non-community water system may apply to the Department for a waiver from the requirements of paragraph (13)(a) and (b) of this section.(d) The Department may grant a waiver for the requirement of paragraph (13)(a) of this section based on the criteria specified in Section E(7)(f) above. The Department may grant a waiver from the requirement of paragraph (13)(b) of this section if previous analytical results indicate contamination would not occur, provided this data was collected after January 1, 1990.(e) Groundwater systems shall take a minimum of one (1) sample at every entry point to the distribution system which is representative of each well after treatment (hereafter called a sampling point). Each sample must be taken at the same sampling point unless conditions make another sampling point more representative of each source or treatment plant.(f) Surface water systems shall take a minimum of one (1) sample at points in the distribution system that are representative of each source or at each entry point to the distribution system after treatment (hereafter called a sampling point). Each sample must be taken at the same sampling point unless conditions make another sampling point more representative of each source or treatment plant. [Note: For purposes of this paragraph, surface water systems include systems with a combination of surface and ground sources.](g) If the system draws water from more than one (1) source and the sources are combined before distribution, the system must sample at an entry point to the distribution system during periods of normal operating conditions (i.e., when water representative of all sources is being used).(h) The Department may require a confirmation sample for positive or negative results.(i) The Department may reduce the total number of samples a system must analyze by allowing the use of compositing. Composite samples from a maximum of five (5) sampling points are allowed. Compositing of samples must be done in the laboratory and the composite sample must be analyzed within fourteen (14) days of collection. If the population served by the system is greater than 3,300 persons, then compositing may only be permitted by the Department at sampling points within a single system. In systems serving 3,300 persons or less, the Department may permit compositing among different systems provided the 5-sample limit is maintained.(j) Instead of performing the monitoring required by this section, a community water system or non-transient non-community water system serving fewer than 150 service connections may send a letter to the Department stating that the system is available for sampling. This letter must be sent to the Department by January 1, 1994. The system shall not send such samples to the Department, unless requested to do so by the Department.(k) List of Unregulated Organic Contaminants: Organic Contaminants | EPA Analytical Method |
Aldicarb | 531.1 |
Aldicarb sulfone | 531.1 |
Aldicarb sulfoxide | 531.1 |
Aldrin | 505, 508, 525.1 |
Butachlor | 507, 525.1 |
Carbaryl | 531.1 |
Dicamba | 515.1 |
Dieldrin | 505, 508, 525.1 |
3.Hydroxycarbofuran | 531.1 |
Methomyl | 531.1 |
Metolachlor | 507, 525.1 |
Metribuzin | 507, 525.1 |
Propachlor | 508, 525.1 |
(l) List of Unregulated Inorganic Contaminants: Inorganic Contaminant | EPA Analytical Method |
Sulfate | Colorimetric |
(14) The owner or operator of a community or non-transient non-community water system that is required to monitor in accordance with this section shall send a copy of the results of such monitoring within thirty (30) days of receipt, and a copy of any public notice under paragraph (15) of this section, to the Department.(15) The owner or operator shall notify the persons served by the system of the availability of the results of sampling conducted in accordance with this section by including a notice in the first set of water bills issued by the system after the receipt of the results or written notice within three (3) months. The notice shall identify a person and supply the telephone number to contact for information on the monitoring results. For surface water systems, public notification is required only after the first quarter's monitoring and must include a statement that additional monitoring will be conducted for three (3) more quarters with the results available upon request.S.C. Code Regs. § 61-58.5.T