From the Village of South Orange:
Dear South Orange Residents and Business Owners,
In March 2011, the NJDEP cited the EOWC for exceeding the allowable concentration of one volatile organic compound (VOC), tetrachloroethylene, in drinking water distributed by EOWC. In particular, the NJDEP’s Notice indicated that, based on twelve months of water samples collected from within EOWC’s system through the first quarter of 2011, the NJDEP had calculated a running annual average of 1.54 µg/L (micro-grams per liter) for tetrachloroethylene. The applicable NJDEP regulations require that the running annual average for tetrachloroethylene, not exceed the NJDEP’s maximum concentration limit (“MCL”) of 1 µg/L, equivalent to 1 part per billion. The rounding protocol currently used by the NJDEP treats a running annual average of 1.5 µg/L or greater as an exceedance. Thus, the 1.54 µg/L result exceeded that figure.
In order to keep its residents advised of the current quality of water being provided by EOWC to the South Orange residents, the Village has decided to post on its website the concentrations of tetrachloroethylene found in samples taken from two locations. The first location is the EOWC finishing plant at the Millburn Pump Station, which sample is taken from the blended water from all of the EOWC wells. This sample is the official sample taken by EOWC and reported to the NJDEP. This sample is now taken by EOWC once a month, and it was the results from this sampling point which the NJDEP used to calculate the 2011 violation. The second location is from the tap at the Crest Drive firehouse. Water at this location is a blend of the EOWC water and water from Well #17 in South Orange, and is more indicative of the water that is actually distributed by EOWC within the Village. The Trustees have directed that samples at this location be taken independently of EOWC’s sampling. Beginning in February 2012 samples from this location are taken twice a month. The result of the EOWC testing and the Village’s independent testing are set forth below.
Currently, the levels detected to not rise to the level of a NJDEP violation, but, as can be seen, the levels are high enough to warrant diligent monitoring. Please be assured that in the event there are ever results which would cause health concerns, the Village will immediately notify all affected water customers.
Date EOWC Result SOV Result January 2, 2012 1.02 µg/L January 20, 2012 0.916 µg/L February 2, 2012 0.959 µg/L February 20, 2012 0.849 µg/L February 27, 2012 0.849 µg/L March 6, 2012 0.938 µg/L March 23, 2012 0.953 µg/L March 30, 2012 0.940 µg/L April 3, 2012 1.08 µg/L May 1, 2012 .0942 µg/L May 7, 2012 0.972 µg/L May 18, 2012 0.936 µg/L June 1, 2012 1.12 µg/L June 1, 2012 1.06 µg/L June 20, 2012 0.89 µg/L July 2, 2012 0.847 µg/L July 6, 2012 0.92 µg/L July 23, 2012 0.756 µg/L August 1, 2012 1.18 µg/L August 2, 2012 1.01 µg/L September 13, 2012 1.15 µg/L September 27, 2012 1.48 µg/L September 28, 2012 1.17 µg/L October 1, 2012 1.16 µg/L October 12, 2012 0.863 µg/L
Patch will follow this story with updates and more information.