What is a background location and what are the background locations for the NFSS?
An adjacent unimpacted area where data is collected to determine what the naturally occurring levels of compounds are for that area. This data is then used to compare with site data to determine what compounds are above background. The background locations used for the NFSS Remedial Investigation are found in Figure 3-14 of the Remedial Investigation Report (Click here for Figure 3-14). Section 4.4.1 of the Remedial Investigation Report discusses how background was determined (Click here for Section 4.4.1). Specifically, background samples for the NFSS were collected along the inside perimeter of the boundary of the former Lake Ontario Ordnance Works Defense Environmental Restoration Program for Formerly Used Defense Sites Site. Because the potential for impact to these sample locations could not be absolutely eliminated, an outlier test was used in conjunction with a review of the historical use of these properties. Any sample that contained elevated levels of constituents of potentia
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