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TABLE 6-12 <br /> STRATFORD PONDS TREATMENT PERFORMANCE <br /> Wastewater Permit Limit Average Annual Average Annual <br /> Percent Removal <br /> Characteristic (mg/L) Influent(mg/L) Effluent(mg/L) <br /> BOD 30 310.6 35.0 89% <br /> TSS 30 126.9 4.4 97% <br /> Total N 10 - 11.2 - <br /> Nitrate-N 10 0.2 2.8 - <br /> Oils &Grease 15 50.6 0.9 98% <br /> (1)Influent wastewater is not typically sampled for Total Nitrogen <br /> Based on the data, the facility does not consistently achieve permit compliance. BOD limits <br /> were exceeded for 6 of the 13 months analyzed. Additionally, Total Nitrogen limits were <br /> exceeded four (4) times, as shown in Figure 6-13. <br /> � 60 Figure 6-13 - Stratford Ponds Nitrogen Concentrations, <br /> Permit Limit <br /> 50 —.—Total N <br /> J <br /> NO3-N <br /> E 40 <br /> 30 <br /> c <br /> 20 <br /> c <br /> 0 <br /> U 10 <br /> �t It L0 u Lo Lo Lo Lo Lo Ln Lo irn <br /> 0 0 0 0 0 0 0 0 0 0 0 0 0 <br /> > 6 c >, c 0) a <br /> 0 z o LL ¢CZ CL (10 -' Q u) O <br /> rtllashpee Seiver Commission <br /> Final Needs Assessment Report L Stearns 1Vbe[er,1,1.0 <br /> 1 Emuonmemn F.ngu'ncrs ma Sae-++sts <br /> 00074.7 6-29 <br /> R <br />