Fifteen (15) of the samples analyzed had results that exceeded the Protection of Groundwater SCO, with some results also exceeding the Restricted Residential Use (RRU) SCO. Protection of Groundwater exceedances were noted for benzo(a)anthracene, benzo(a)pyrene, chrysene, and pentaclorophenol. RRU SCO exceedances were benzo(b)fluoranthene, benzo(g,h,i)perylene, benzo(k)fluoranthene, and indeno(1,2,3-cd) pyrene. These SVOCs are typical of petroleum related compounds, with concentrations generally increasing to the east.
Metals were detected above the Protection of Groundwater SCO in thirty-four (34) of the samples, and above the Restricted Residential Use SCO in seven (7) samples. Exceedances included arsenic, cadmium, chromium (III), manganese, nickel, and selenium.
(5) Pesticides / Herbicides
Pesticides and herbicides were detected above the Protection of Groundwater SCO for alpha-BHC in two samples, LT-T-007 and LT-T-008. Samples LT-T-002 through LT-T-012 all exceeded the RRU SCO for aldrin.
In addition to analysis of samples in accordance with Part 375, analysis was performed in accordance with the NYSDEC Technical & Operational Guidance Series (TOGS) 5.9.1: In-Water and Riparian Management of Sediment and Dredged Material. Forty-five (45) of the forty-seven (47) samples had exceedances that result in classification of the sediments as Class B: Moderate Contamination – Chronic Toxicity to Aquatic Life. Twenty-seven (27) of the samples had exceedances that qualify those sediments as Class C: Acute Toxicity to Aquatic Life.