§ 46-13.1-4 Groundwater classification.– (a) For the purpose of protecting existing, proposed, or potential drinkingwater supplies, the director shall conduct a survey of all groundwater sourcesand related groundwater aquifers, watersheds, and deep flow recharge areas.Upon completion of the survey, the director shall designate the groundwatersources under one of the following classifications:
(1) GAA – groundwater sources suitable for publicdrinking water use without treatment;
(2) GA – groundwater sources which may be suitable forpublic or private drinking water without treatment;
(3) GB – groundwater sources which may not be suitablefor public or private drinking water without treatment due to known or presumeddegradation;
(4) GC – groundwater sources which may be suitable forcertain waste disposal practices because past or present land use orhydrogeologic conditions render the groundwaters more suitable for receivingpermitted discharges than for development as public or private water supply.
(b) The director shall develop water quality standards foreach classification which specify maximum contaminant levels for eachclassification. The approach for establishing the water quality standards shallinclude appropriate criteria established by the United States EnvironmentalProtection Agency to protect the uses of groundwater as designated by thedirector. Water quality standards shall be used to promote restoration ofgroundwater to drinking water quality without treatment except where thegroundwater is:
(1) In a zone of discharge otherwise permitted by theprovisions of the general laws;
(2) Classified as GB and there exists no demonstrated presentor future need to upgrade to GA; or
(3) Classified as GC.
(c) The director shall also develop a preventive action limitfor each maximum contaminant level for each classification. In determining thepercentage of the maximum contaminant level to be used as a preventive actionlimit for each contaminant, the director shall take into account whether thecontaminant is a toxic pollutant and, if so, whether it has carcinogenic,mutagenic, or teratogenic properties or interactive effects. The director shallpromulgate rules setting forth the range of responses that he or she may take,or that he or she may require the person, corporation, or other entitycontrolling a facility, activity, or practice that is a source of thecontaminant to take, if the preventive action limit is attained or exceeded.The responses shall be designed to:
(1) Minimize the concentration of the contaminant in thegroundwater where technically and economically feasible;
(2) Regain and maintain compliance with the preventive actionlimit, unless the director determines that the preventive action limit iseither not technically or not economically feasible, in which case he or sheshall achieve compliance with the lowest possible concentration that istechnically and economically feasible; and
(3) Ensure that the maximum contaminant level is not attainedor exceeded.
(d) The director shall complete duties assigned under thissection on or before February 28, 1989.
§ 46-13.1-4 Groundwater classification.– (a) For the purpose of protecting existing, proposed, or potential drinkingwater supplies, the director shall conduct a survey of all groundwater sourcesand related groundwater aquifers, watersheds, and deep flow recharge areas.Upon completion of the survey, the director shall designate the groundwatersources under one of the following classifications:
(1) GAA – groundwater sources suitable for publicdrinking water use without treatment;
(2) GA – groundwater sources which may be suitable forpublic or private drinking water without treatment;
(3) GB – groundwater sources which may not be suitablefor public or private drinking water without treatment due to known or presumeddegradation;
(4) GC – groundwater sources which may be suitable forcertain waste disposal practices because past or present land use orhydrogeologic conditions render the groundwaters more suitable for receivingpermitted discharges than for development as public or private water supply.
(b) The director shall develop water quality standards foreach classification which specify maximum contaminant levels for eachclassification. The approach for establishing the water quality standards shallinclude appropriate criteria established by the United States EnvironmentalProtection Agency to protect the uses of groundwater as designated by thedirector. Water quality standards shall be used to promote restoration ofgroundwater to drinking water quality without treatment except where thegroundwater is:
(1) In a zone of discharge otherwise permitted by theprovisions of the general laws;
(2) Classified as GB and there exists no demonstrated presentor future need to upgrade to GA; or
(3) Classified as GC.
(c) The director shall also develop a preventive action limitfor each maximum contaminant level for each classification. In determining thepercentage of the maximum contaminant level to be used as a preventive actionlimit for each contaminant, the director shall take into account whether thecontaminant is a toxic pollutant and, if so, whether it has carcinogenic,mutagenic, or teratogenic properties or interactive effects. The director shallpromulgate rules setting forth the range of responses that he or she may take,or that he or she may require the person, corporation, or other entitycontrolling a facility, activity, or practice that is a source of thecontaminant to take, if the preventive action limit is attained or exceeded.The responses shall be designed to:
(1) Minimize the concentration of the contaminant in thegroundwater where technically and economically feasible;
(2) Regain and maintain compliance with the preventive actionlimit, unless the director determines that the preventive action limit iseither not technically or not economically feasible, in which case he or sheshall achieve compliance with the lowest possible concentration that istechnically and economically feasible; and
(3) Ensure that the maximum contaminant level is not attainedor exceeded.
(d) The director shall complete duties assigned under thissection on or before February 28, 1989.
§ 46-13.1-4 Groundwater classification.– (a) For the purpose of protecting existing, proposed, or potential drinkingwater supplies, the director shall conduct a survey of all groundwater sourcesand related groundwater aquifers, watersheds, and deep flow recharge areas.Upon completion of the survey, the director shall designate the groundwatersources under one of the following classifications:
(1) GAA – groundwater sources suitable for publicdrinking water use without treatment;
(2) GA – groundwater sources which may be suitable forpublic or private drinking water without treatment;
(3) GB – groundwater sources which may not be suitablefor public or private drinking water without treatment due to known or presumeddegradation;
(4) GC – groundwater sources which may be suitable forcertain waste disposal practices because past or present land use orhydrogeologic conditions render the groundwaters more suitable for receivingpermitted discharges than for development as public or private water supply.
(b) The director shall develop water quality standards foreach classification which specify maximum contaminant levels for eachclassification. The approach for establishing the water quality standards shallinclude appropriate criteria established by the United States EnvironmentalProtection Agency to protect the uses of groundwater as designated by thedirector. Water quality standards shall be used to promote restoration ofgroundwater to drinking water quality without treatment except where thegroundwater is:
(1) In a zone of discharge otherwise permitted by theprovisions of the general laws;
(2) Classified as GB and there exists no demonstrated presentor future need to upgrade to GA; or
(3) Classified as GC.
(c) The director shall also develop a preventive action limitfor each maximum contaminant level for each classification. In determining thepercentage of the maximum contaminant level to be used as a preventive actionlimit for each contaminant, the director shall take into account whether thecontaminant is a toxic pollutant and, if so, whether it has carcinogenic,mutagenic, or teratogenic properties or interactive effects. The director shallpromulgate rules setting forth the range of responses that he or she may take,or that he or she may require the person, corporation, or other entitycontrolling a facility, activity, or practice that is a source of thecontaminant to take, if the preventive action limit is attained or exceeded.The responses shall be designed to:
(1) Minimize the concentration of the contaminant in thegroundwater where technically and economically feasible;
(2) Regain and maintain compliance with the preventive actionlimit, unless the director determines that the preventive action limit iseither not technically or not economically feasible, in which case he or sheshall achieve compliance with the lowest possible concentration that istechnically and economically feasible; and
(3) Ensure that the maximum contaminant level is not attainedor exceeded.
(d) The director shall complete duties assigned under thissection on or before February 28, 1989.
