NYC-WTC_000204859

NYC 9/11 Public Portal Document

OCT-31-2001 16:45 718 732 452 6464 718 732 452 6464 P.33/35

Sampling Date: October 10, 2001

Location: Grab samples from direct discharge to the Hudson River.

Sample Matrix: Aqueous

Analytes (Laboratory): VOCs (Region 2) PCB Congeners (Region 2) NVOAs (Region 2) Metals + mercury (Region 2) BODS (Region 2) COD (Region 2) Aquatic Toxicity (marine Mysids and Minnows) (Region 2) TSS (Region 2) Total Petroleum Hydrocarbons (Region 2) Oil and Grease (Region 2) Sulfate (Region 2) Chloride (Region 2) Salinity (Region 2) Dissolved Oxygen (Region 2) Residual Chlorine (Region 2) Alkalinity (Region 2) Ammonia (Region 2) Dioxins/Furans (contract lab- Paradigm Analytical) Asbestos (contract lab)

Dewatering Activity: The Port Authority of New York and New Jersey (PANYNJ) initiated pumping from the PATH tunnels at Exchange Place under an existing permit (NJ0076988) on September 11,2001. PANYNJ estimates that discharge averages 2600 GPM. The F tunnel has been plugged since the WTC disaster, and no dewatering is occurring from that tunnel. Dewatering continues from the E tunnel. Pumps are activated by a manual “float switch”, and operate between 8 and 12 hours per day. The tunnel is estimated to fill at between 800 - 1200 gpm. NJDEP had been notified of the enhanced discharge, but neither performed sampling or required additional sampling by PANYNJ, EPA learned of the enhanced discharge on October 01, 2001, performed reconnaissance on October 02, and sampled the discharge on October 03, There were no significant contaminant concentrations detected in that sample.

Plugging the PATH tunnel F near Exchange Place will necessitate pumping the tunnel from Manhattan. The plug is expected to be in place by 10/10/01. PANYNJ has suggested that they would prefer to discharge directly to the Hudson River, There does not appear to be an existing NPDES pennit for the proposed discharge. EPA was informed on 10/09/01 that the characteristics of the discharge at Exchange Place had changed, and was now "black and smelly”. To address this, and to characterize the discharge more fully to assess the expected quality of the proposed discharge from the Manhattan side, EPA re-sampled the discharge at Exchange Place on 10/10/01.

CITY_21MC100_006753041

NYC-WTC_000204860