OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
SEP-18-2001 is:09 P.03/19
above.
Dredge Material Disposal: Dredged material is destined for the contaminated dredge material borrow pits on ths west side of Newark Bay.
Preliminar) Results;
Volatile Organic Compounds fVOCs): Three VOCs (acetone, carbon disulfide, 2- butanone) 'were detected at very low concentrations. Acetone was detected in the lab blank, suggesting laboratory contamination with this common laboratory reagent.
Base Neutral/Acid Extractables (BNAs); BN As were detected in all of the samples. The highest concentrations were detected in ths six (6) inch deep petit ponar grab sample that was collected closest to the Joe DiMaggio Drive bulkhead (sample P-l). The compounds detected are often associated with highway runoff, creosote treated marine pilings, and industrial activities. Detected concentrations were compared to the ecological Effects Range Low (ERL) and Effect Range Medium (ERM) established by NOAA for the eleven (11) compounds for which these values exist. Five (5) compounds exceeded the ERM, and all were in the petit ponar grab (P-1) sample. ERM exceedences were all less than a factor of two (2). Figure attached.
Metals: All samples were analyzed for arsenic, cadmium, copper, lead, and mercury. All of the metals were detected in all of the samples As for PaHs, petit ponar sample P-1 contained the highest concentrations of all of the metals. Concentrations of the metals in all of the six samples collected exceeded the upper concentrations detected throughout NY Harbor during EP.A’s 1994-1995 REMAP survey Figure attached,.
mg'TKg (ppm) Mean Result 1993 -1994 Metal Detected Ranee ERL ERM EPA REMAP Sur>-evNY/NJ Harbor Estuary* Arsenic 8.8-13 8.2 70 10.33 ±2.05 Cadmium 0.71-2.6 1.2 9.6 0.71 -0.13 Copper 88 - 220 34 270 72.53 + 17.4 Lead 110-250 46.7 218 78.8 ±12.8 Mercury 1.2-2.8 0.15 0.71 0.74 z 0.14
* t is the 90% confidence interval
PCBs: PCBs were analysed as arociors in all samples. Two (2) PCBs (Arocior 1254 and 1260) were detected in all of the samples. No other PCBs were detected in any sample.
CITY_21MC100_003112917
NYC-WTC_000195868
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