Laserfiche WebLink
COLORADO <br />Department of Public <br />`4# ?- Health b Environment <br />Water Quality Assessment <br />Acute WQBELs for Human Health and Agricultural Standards for the Yampa River <br />Outfalls 002, 011, 017, 020, 021, 023 and 025 <br />Parameter <br />Q, (cfs) <br />Q2 (cfs) <br />Q3 (cfs) <br />M, <br />M3 <br />M2 <br />Cr+3, TR (Ng/l) <br />70 <br />20 <br />90 <br />0 <br />50 <br />225 <br />Flow for process water outfalls combined <br />Table A -8e <br />Chronic WQBELs for Human Health and Agricultural Standards for the Yampa River <br />Outfall 002 Additional Pollutants of Concern <br />Parameter (pg/1) <br />Qi (cfs) <br />Q2 (cfs) <br />Q3 (cfs) <br />M, <br />M3 <br />M2 <br />Notes <br />Benzene <br />113 <br />1.5 <br />114.5 <br />0 <br />2.2 <br />168 <br />1 <br />Toluene <br />113 <br />1.5 <br />114.5 <br />0 <br />510 <br />38930 <br />1 <br />Ethylbenzene <br />113 <br />1.5 <br />114.5 <br />0 <br />530 <br />40457 <br />1 <br />Anthracene <br />113 <br />1.5 <br />114.5 <br />0 <br />2,100 <br />160300 <br />1 <br />Benzo(a)anthracene <br />113 <br />1.5 <br />114.5 <br />0 <br />0.0038 <br />0.29 <br />1 <br />Benzo(a)pyrene <br />113 <br />1.5 <br />114.5 <br />0 <br />0.0038 <br />0.29 <br />1 <br />Benzo(b)fluoranthene <br />113 <br />1.5 <br />114.5 <br />0 <br />0.0038 <br />0.29 <br />1 <br />Benzo(k)fluoranthene <br />113 <br />1.5 <br />114.5 <br />0 <br />0.0038 <br />0.29 <br />1 <br />Benzo(g,h,i)perylene <br />113 <br />1.5 <br />114.5 <br />0 <br />0.0038 <br />0.29 <br />1 <br />Chrysene <br />113 <br />1.5 <br />114.5 <br />0 <br />0.0038 <br />0.29 <br />1 <br />Dibenzo(a,h)anthracene <br />113 <br />1.5 <br />114.5 <br />0 <br />0.0038 <br />0.29 <br />1 <br />Fluoranthene <br />113 <br />1.5 <br />114.5 <br />0 <br />130 <br />9923 <br />1 <br />Fluorene <br />113 <br />1.5 <br />114.5 <br />0 <br />280 <br />21373 <br />1 <br />Indeno(1,2,3-cd)pyrene <br />113 <br />1.5 <br />114.5 <br />0 <br />0.0038 <br />0.29 <br />1 <br />Naphthalene <br />113 <br />1.5 <br />114.5 <br />0 <br />140 <br />10687 <br />1 <br />Pyrene <br />113 <br />1.5 <br />114.5 <br />0 <br />210 <br />16030 <br />q <br />Note 1: Ambient data are not available; value assumed zero <br />Whole Effluent Toxicity (WET) Testing: <br />The Water Quality Control Division has established the use of WET testing as a method for identifying and <br />controlling toxic discharges from wastewater treatment facilities. WET testing is being utilized as a means <br />to ensure that there are no discharges of pollutants "in amounts, concentrations or combinations which are <br />harmful to the beneficial uses or toxic to humans, animals, plants, or aquatic life" as required by Section <br />31.11 (1) of the Basic Standards and Methodologies for Surface Waters. The requirements for WET testing <br />are being implemented in accordance with Division policy, Implementation of the Narrative Standard for <br />Toxicity in Discharge Permits Using Whole Effluent Toxicity (Sept 30, 2010). Note that this policy has <br />recently been updated and the permittee should refer to this document for additional information <br />regarding WET. <br />In -Stream Waste Concentration (IWC) - Where monitoring or limitations for WET are deemed appropriate by <br />the Division, the chronic in -stream dilution is critical in determining whether acute or chronic conditions <br />shall apply. In accordance with Division policy, for those discharges where the chronic IWC is greater than <br />9.1% and the receiving stream has a Class 1 Aquatic Life use or Class 2 Aquatic Life use with all of the <br />appropriate aquatic life numeric standards, chronic conditions will normally apply. Where the chronic IWC <br />is less than or equal to 9.1, or the stream is not classified as described above, acute conditions will <br />Pae 24 of 40 . <br />4300 Cherry Creek Drive S., Denver, CO 80246-1530 303-692-2000 www.colorado.gov/cdphe/wqcd I <br />