Sector-Specific Benchmark Values and Effluent Limitations: Sector - S2: Discharges may be subject to requirements for more than one sector or subsector.
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Subsector Parameter Benchmark Values
S2 Airports that use less than 100,000 gallons of glycol-based deicing/anti-icing chemicals and/or less than 100 tons of urea on an average annual basis. Solids, Total Suspended (TSS) 100 mg/L 1
5-Day Carbonaceous, Biochemical Oxygen Demand (CBOD5) 25 mg/L
Chemical Oxygen Demand (COD) 5-Day Carbonaceous, Biochemical Oxygen Demand 120 mg/L
Nitrogen, Ammonia, Total (as N) 2.8 mg/L

1If the Permittee is required to comply with Appendix A, part F.1, the benchmark value for Solids, Total Suspended (TSS) is 65 mg/L, instead of 100 mg/L.

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