Biological Survey of Pere Marquette Lake, 1975 |
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Ammonia nitrogen-N analyses of composite benthic benthos biological survey cadmium chaetae chironomids chlorinated hydrocarbons chromium composite samples appear Computed flow rate computed pounds copper Cricotopus discharged to Pere Dow Chemical Company DOW SETTLING POND dredge effluent eutrophic F F F F Valvata Pelecypoda flow rate mgd former Ludington WWTP HARBISON Harbison-Walker discharge Harbison-Walker Refractories heavily polluted heavy metals Hexagenia hoffmeisteri hydrocarbons and phthalates July LAKE MICHIGAN lbs/year Limnodrilus littoral zone locations on Pere LUDINGTON FORMER WWTP Ludington Wastewater Treatment Ludington WWTP discharge macroinvertebrate Mason County maumeensis Mean number moderately polluted nickel Nitrate nitrogen-N number of individuals/m² oligochaetes Organic nitrogen-N outfall Peloscolex freyi Percent Pere Marquette Lake Pere Marquette River Petite Ponar phosphorus phosphorus loading plumosus profundal profundal zone Quantitative analyses Sand Scottville Semi-annual lagoon discharges Soluble orthophosphate-P Station Number Stations 14 substrate total chromium Total phosphorus-P Tubificidae U.S. EPA vicinity wastewater survey Wastewater Treatment Plant Water Quality Division zinc