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<br />iJn25~3 <br /> <br />Table 11 (cont.): Basic standards for organic chemicals, Colorado <br /> <br />1 All standards are chronic or 3D-day standards. They are based on information contained in EPA's <br />Integrated Risk Information System (IRIS) and/or EPA lifetime health advisories for drinking water using <br />a 10-6 incremental risk factor unless otherwise noted. <br /> <br />2 Only applicable to segments classified for water supply. <br /> <br />3 Applicable to all Class 1 aquatic life segments or Class 2 aquatic life segments designated by the <br />Commission after rulemaking hearing. <br /> <br />4 Applicable to all aquatic life segments. <br /> <br />5 POL's are detection levels based on the Colorado Department of Health's laboratories best judgement <br />for Gas Chromotography/Mass Spectrophotometry (GC/MS) unless otherwise noted. <br /> <br />6 Standards are pH dependent. Those listed are calculated for pH = 7 .0. Acute = eI1.005(pHI-4.83]; <br />Chronic = el1.005(pHI-5.29J. <br /> <br />C Carcinogens classified by the EPA as A, B 1, or B2. <br /> <br />o Total trihalomethanes are considered the sum of the concentrations of bromodichloromethane, <br />dibromochloromethane, tribromomethane (bromoform) and trichloromethane (chloroform). <br /> <br />M Drinking water MCL <br /> <br />45 <br /> <br /> <br />. Gas Chromotrography (GCI POL <br /> <br />.. High Pressure Liquid Chromotography IHPLC) POL <br /> <br />CAS No. - Chemical Abstracts Service Registry Number <br /> <br />(HM) - Halomethanes <br /> <br />(PAHI - Polymer Aromatic Hydrocarbons <br /> <br />Taken from Colorado Water Quality Control Commission 1993a <br />