Item A - PH on MWMC/Metro Plan - Laserfiche WebLink

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File Number: 55999 Page 13 ~f26 Pages survival test endpoint, and Raphidocelis subcapitata (green alga formerly kno.wn as · · . Selanastrum capricornutum) for.growth test endpolnt. · (2) The prasence of chronic toxicity shall be estimated as specified in Short-term MethOds for Estimating the Chronic Toxicity of Effluents and Receiving War. ers to Freshwater Organisms, Third Edition, EPAI600/4-91/O02, July 1994. (3) A chronic bioassay test. shall be considered to show .toxicity if a statistically significant difference, in survival, growth, or reproduction occurs at dilutions greater than that which is known to occur at the edge of the mixing zone. e. Quality Assurance · il) Quality assurance criteria, statistical analyses and data reporting for the bioassays shall be in accordance with the EPA documents stated in this condition and the Department's Whole Effluent Toxicity Testing Guidance Document, January 1993. f. Evaluation of Causes and Exceedances '.:' (1) If toxicity is shown, as defined in sections c.(3) or d.(3) of this pear.it condition, another toxicity test using the same species and Dep. artment approved moth ~dology shall be conducted within two weeks, unless othervase approved by the.Del; artment. If the second test also indicates toxicity, the Eermittee shall follow the procedure described in section f.(2)'ofthis permit condition. (2) .If two consecutive bioassay test results indicate acute and/or chroni: toxicity, as defined in sections c.(3) or d.(3) of this permit condition, the permittee shalt evalaate4m-se~3rce of '~ ' the toxicity and submit a plan and time schedule for demonstrating ~ompliance with water quality standards. Upon approval by the Department, the permittee shall implement the · 'plan.until compliance has been achieved.. Evaluations shall be co= pleted and plans submitted to the Depaxaa~nt within 6 months unless otherwise appl.'oved in writing by the, .. Department. ~ g. Repor~ng (1) Along with.the test results, the permittee shall include: 1. the dates of sample collection and initiation of each toxicity test; and 2. the flow rate at the time Of sample collection. Effluent at the time of sampling for bioassay testing sh.ould inc. l. ud~ samples Of required param.eters stated under Schedule B, Condition. !' of th,s perm,, ~ . (2) The permit-tee shall make'available to the Department, on request, Me written standard operating procedures they, or the laboratory performing the bioassays, are using for all toxicity tests required by the Department. I h. Keopener,I (1) Ifbioassay testing indicates acute and/or chronic toxicity, the Dep~anent mayreopen and modify this permit't6 include new limitations and/or conditions as determined bYthe Department to be appropriate, and in accordance with procedures ~utl~ed in Oregon Administxative Rules, Chapter 340, Division 45. 6. The permittee shall comply with Oregon Administrative Rules (OAK), Chapter 340, Division 49, "Regulations Pertaining To Certification of Wastewater System Operator Personnel" and accordingly: a. The permittee shall have its wastewater system supervised by one or more operators who are certified in a classification and grade level (equal to or greater) that corre?cmct~ with the 4-37 cl?,.,s.'fficatio.n. (collection and/or tr~amaent) of the system to be supervised as specified on page one