NYCDEPCostAnalys isReport-0607 .pdf - New York-New Jersey ...

loading conditions. The peaking factors were applied to the projected 2045 flows and loads to
create the influent flows and loads assumptions shown in Table 1-17 and are as follows:
• BOD: 1.31
• TSS: 1.65
• TKN: 1.52
Table 1-17: Influent Flow and Load Assumptions
Conditions
Flow BOD TSS TKN
(MGD) (mg/L) (lbs/d) (mg/L) (lbs/d) (mg/L) (lbs/d)
Design Average 120 134.3 134,400 150 150,000 27 27,100
Design Maximum 120 176 176,064 247 247,500 41.2 41,192
Per the mass balances presented in Section 2 of the Owls Head report, the Primary Settling
Tanks remove a substantial portion of influent TSS, as well as BOD and TKN. The percent
removals across the Primary Settling Tanks are as follows:
• 53% reduction of TSS loading
• 17.2% reduction of BOD loading
• 11.2% reduction of TKN loading
Applying these removals to the influent characteristics estimates the characteristics of the
primary effluent to be used in the model. The estimated primary effluent characteristics are
presented below in Table 1-18.
Table 1-18: Primary Effluent Flow and Load Assumptions
Conditions
Flow BOD TSS TKN
(MGD) (mg/L) (lbs/d) (mg/L) (lbs/d) (mg/L) (lbs/d)
Design Average 120 111 111,283 70 70,500 24 24,065
Design Maximum 120 146 145,781 116 116,325 37 36,578
1.4 Plant Specific Analysis
The following four reports detail the conceptual designs developed to implement the various
levels of technology listed in Section 1.1. The reports are presented as follows:
• Port Richmond
• Red Hook
• North River
• Owls Head
The reports provide an introduction to the existing plants and step through each level of
technology, addressing the impacts on each treatment step and providing conceptual designs to
incorporate each technology into the plant’s infrastructure and operations.