FIELD DOCUMENTS AND WORK PLANS 1990

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Marley Cooling Tower Company -3- 28 November 1990 14 November 1990 Meeting Minutes Because the expansion of the treatment system will be changing the water quality of the effluent, it was agreed that the NPDES permit will be modified to continue with toxicity testing using fathead minnows and to include additional testing using Ceriodaohnia. The frequency of toxicity tests using fathead minnows will be reduced from monthly to quarterly, due in part to the large historical record of passing toxicity tests. The frequency of the toxicity tests using Ceriodaohnia will be monthly, based on 24-hour composite samples. It was agreed that the monthly tests would continue during the first and second expansions of the treatment system, but that once the second and final expansion of the treatment system is implemented, that the frequency of all toxicity testing should be reduced assuming that no instream toxicity is found. QUARTERLY MONITORING REPORT SUBMITTALS The content of the quarterly monitoring report submittals was reviewed. MCTC had requested that the submittal of all the Quality Assurance / Quality Control (QA/QC) laboratory sheets be eliminated from each quarterly report, but that any laboratory QA/QC sheet would be made available upon request. It was agreed that the QA/QC sheet did not need to be included in the April and October Quarterly Monitoring Reports and that these reports would only contain water level maps, "chemographs" (concentration versus time graphs) for the anomalous data and brief summaries on the anomalous data and laboratory QA/QC. The January and July Quarterly Monitoring Reports will continue to be submitted in the current format which includes the laboratory QA/QC sheets. The Annual Monitoring Reports will be submitted with all the supporting information, including all of the chemographs for all wells. CKW:cw