NYC-WTC_000209168

NYC 9/11 Public Portal Document

DSN Monthly Average Long Term Average Description of Flow, GPD (Appl) Flow, GPD (DMR) Treatment

001 7200 480 None

002 32000 480 None

003 NA NA None

Parameter Non-numeric Monitoring Requirements Effluent Limit Frequency Type

Flow (GPD) BMP Semi-Annually Calculated

pH BMP Semi-Annually Grab TSS, mg/L TOC, mg/L Petroleum Hydrocarbons, mg/L

Preliminary Results:

Metals: Laboratory results for metals and a comparison with results from runoff, ambient, and Newtown Creek STP samples are shown in Table 1. Toxic metals were not detected, except for barium which was detected at an elevated concentration versus the ambient Hudson River background sample collected on 09/20/01 by the George Washington Bridge. The barium concentration of 150 ug/L is less than the 1000 ug/L federal ambient water criteria for protection of human health from carcinogens, the only federal water quality criteria for this metal. Calcium, iron, and manganese were detected at elevated concentrations relative to GWB background, and sodium and potassium were detected at lower values. No other metals were detected.

PCB Congeners ; None of the 71 PCB congeners analyzed were detected (DL 0.0054 ug/L).

NVOAs: Thirteen NVOA compounds were detected. Ten of these NVOAs are PAHs. There are neither federal marine acute or chronic criteria for any of the detected NVOAs. Benzoic acid (500 ug/L) and bis-2(chloroisopropyl) ether (69 ug/L), and 2,4-dimethyl phenol were detected at the highest concentrations. These compounds are not PAHs, which were detected a very low concentrations.

VOCs: Seven (7) VOCs were detected, all at less than 100 ug/L. For the detected VOGs, federal marine Water Quality Criteria are only applicable for toluene, with acute and chronic marine criteria of 6300 and 5000 ug/L, respectively. Toluene was detected at 13 ug/L, far below the criteria concentrations. Table 2 provides

CITY_21MC100_009253641

NYC-WTC_000209169