Res 2005-105 - Laserfiche WebLink

Home Browse Search

City of San Marcos TPDES Permit No. WQOO I 0273002 conducting the TRE, including toxicity characterizations, identifications, confinuations, source eyaluations, treatability studies, and/or alternative approaches. When conducting characterization analyses, the permittee shall perform multiple characterizations and follow the procedures specified in the document entitled, "Toxicity Identification Eyaluation: Characterization of Chronically Toxic Effluents, Phase I" (EPN600/6-91/005F), or alternate procedures. The permittee shall perform multiple identifications and follow the methods specified in the documents entitled, "Methods for Aquatic Toxicity Identification Evaluations, Phase II Toxicity Identification Procedures for Samples Exhibiting Acute and Chronic Toxicity" (EPN6001R-92/080) and "Methods for Aquatic Toxicity Identification Evaluations, Phase ill Toxicity Confirmation Procedures for Samples Exhibiting Acute and Chronic Toxicity" (EPN6001R-92/081). All characterization, identification, and confirmation tests shall be conducted in an orderly and logical progression; 2) Sampling Plan - The TRE Action Plan should describe sampling locations, methods, holding times, chain of custody, and preservation teclmiques. The effiuent sample yolume collected for all tests shall be adequate to perform the toxicity characterization! identification! confirmation procedures, and chemical- specific analyses when the toxicity tests show significant lethality. Where the pennittee has identified or suspects specific pollutant(s) and/or source(s) of effluent toxicity, the permittee shall conduct, concurrent with toxicity testing, chemical-specific analyses for the identified and/or suspected pol1utant(s) and/or source(s) of effluent toxicity; 3) Quality Assurance Plan - The TRE Action Plan should address record keeping and data evaluation, calibration and standardization, baseline tests, system blanks, controls, duplicates, spikes, toxicity persistence in the samples, randomization, reference toxicant control charts, as well as mechanisms to detect artifactual toxicity; and 4) Project Organization - The TRE Action Plan should describe the project staff, project manager, consulting engineering services (where applicable), consulting analytical and toxicological services, etc. c. Within 30 days of submittal of the TRE Action Plan and Schedule, the permittee shall implement the TRE with due diligence. d. The permittee shall submit quarterly TRE Activities Reports concerning the progress of the TRE. The quarterly reports are due on or before April 20th, July 20th, October 20th, and January 20th. The report shall detail information regarding the TRE activities including: I) results and interpretation of any chemical-specific analyses for the identified and/or suspected pollutant(s) performed during the quarter; 2) results and interpretation of any characterization, identification, and confirmation tests performed during the quarter; 3) any data and/or substantiating documentation which identifies the pollutant(s) and/or source(s) of effluent toxicity; 4) results of any studies/evaluations concerning the treatability of the facility's effluent toxicity; 5) any data which identifies effluent toxicity control mechanisms that will reduce effluent toxicity to the }eyel necessary to meet no significant lethality at the critical dilution; and 6) any changes to the initial TRE Plan and Schedule that are believed necessary as a result of the TRE findings. Page 30