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Published bySydney Dolan Modified over 9 years ago
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MDFW Hatchery NPDES Program Ken Simmons Chief of Hatcheries/Trout Project Leader
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MDFW HATCHERIES Sandwich Hatchery (1912) -Trout* Sunderland Hatchery (1913) - Trout* Palmer Hatchery (1914) - Atlantic salmon Montague Hatchery (1917) - Trout* McLaughlin Hatchery (1969) - Trout* * NPDES permit required
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NPDES Four MDFW Trout Hatchery Permits Renewed in Past Year Observations on the process Formalin Discuss Today
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Impact on Hatchery Operations Discharge limits were not substantially changed Frequency of effluent sampling was reduced Effluent sampling quarterly and only during major cleaning operations continued
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Impact on Hatchery Operations Increased use of settling pools at 3 older DFW facilities Reduced production at 3 older facilities Greatly altered operations at 3 older facilities Formalin use all but eliminated at 3 older facilities
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Impact on Pounds of Trout Produced
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Effluent Monitoring Flow BOD TSS pH Dissolved oxygen Total ammonia nitrogen, as N* Residual chlorine* Total phosphorous* Formaldehyde Whole Effluent Toxicity - chronic** Whole Effluent Toxicity - acute** *Not at all facilities **New to current permit
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Effluent Sampling Quarterly (except pH, formalin & chlorine) Three of the quarterly samples must be taken when conducting pool breakdown and/or settling pool or quiescent zone cleaning One quarterly sample must be taken during annual pool breakdown/cleaning Composite samples -- 1 per hour for 8 hours
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Formalin Use Discharge limit of 0.74 mg/l (formaldehyde) at all facilities Developed formalin use plan for each hatchery as part of B.M. P. Do not know if it will work except at McLaughlin Hatchery
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Formalin Use Problems 0.74 mg/l limit effectively eliminates use at 3 of 4 facilities due to flow patterns and dilution factors Difficult to retain a certified lab that can analyze formaldehyde with E.P.A. methods on short notice W.E.T. tests - labs to conduct work on short notice Cost of tests
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Whole Effluent Toxicity (%) Acute (invertebrates only) *If formalin is used
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Whole Effluent Toxicity (%) Chronic (invertebrates only) *If formalin is used
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My Thoughts Agency must play an active role in the process Develop & maintain a professional working relationship with the regulators Be honest and forthcoming with information Do not hesitate to ask questions or seek clarification of issues Exercise your right to seek change and/or clarification of pre- public draft permits Tremendous amount of work involved
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Summary We do not yet know if we will be able to meet new effluent limits at all stations but have developed BMP’s with that goal Formalin use at 3 of 4 hatcheries is all but impossible Formalin use at McLaughlin Hatchery is feasible but with constraints
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FLOW (MGD)
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BOD (mg/l) *During cleaning operations
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TSS (mg/l) *During cleaning operations
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Total Phosphorous (mg/l) *During cleaning operations ***No limit issued
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Total Ammonia Nitrogen, as N (mg/l) *During cleaning operations ***No limit issued
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Total Residual Chlorine (ug/l)
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