THIRD (i.e Wilf's) OF FOUR DNAPL REPORTS AS PER TUESDAY'S BLOG HERE

This DNAPL report was written by Wilf Ruland, hydrogeologist, on Aprril 21, 2006 eighteen days after Jaimie Connoll's (M.O.E.) DANAPL report of April 3/2006. Wilf suggests on page 2 that "There may still be at least minor DNAPL pure phase pools on site, and there are certainly many areas where there is residual DNAPL in soils." He is concerned that "...the flow of significant quantities of DNAPL (and other) contaminants from the Crompton property may not be contained (either in an on-site well or a nearby off-site well in accordance with CPAC's Optimization Principles), including *in UA3, along the western site boundary *in the MU just to the south-west of M-2 *in the bedrock aquifer. ................................................................................................................................... Wilf suggests that flow paths from contaminant sources are inadequate . There is no substantive mapping to determine where and how contaminants are travelling downwards from one aquifer to the next. He feels that better plume mapping could be used to better determine plume flow paths toward and through the "windows" connecting one aquifer to the next. .................................................................................................................................................. Wilf is disatisfied with unanswered questions as to the source area of the contamination flowing down into the ML/Bedrock aquifers on the west side of the Uniroyal site (near OW-58?). He feels that TPW-2 (tar pit west-2) needs to be remediated. He states that it is possible that both free phase DNAPL and LNAPL still exist in this location. My opinion is that Uniroyal/Lanxess and CRA/GHD don't care and are satisfied that another twenty-five years will help dissipate, dissolve and dilute this free phase DNAPL and LNAPL. In other words to hell with the natural environment. Wilf states that both RPW-3 and RPW-4 have been inadequately investigated to date. More investigation is required to determine whether or not RPW-5 is still a significant source area. He feels that RPW-7/8 may still have free phase DNAPL present and that there is a major "window" from the UA (Upper Aquifer)to the MU (Municipal Upper) in this area. Finally on the west side there are still serious issues with the former M-2 landfill. Free phase Upper Aquifer DNAPL may have migrated downward to the Municipal Upper Aquifer. Excavation of DNAPL (in 1993) from TPW-2 found DNAPL and tars interspersed with municipal garbage from M-2. There is a major "window" or opening from the UA through the lower permeability aquitard and into the MU. Possibly DNAPL has moved off-site to the south-west immediately adjacent to M-2. ................................................................................................................................ On the east side at RPE-1 there was formerly free phase DNAPL and there still is residual DNAPL present. Also further investigation is necessary to determine if off-site free phase DNAPL exists to the south-west of M-2. There are current flows from from the west part of the Crompton property which apear to be causing ongoing significant contamination of the Municipal Lower (ML) and bedrock aquifers near well MOE1 which is on the west side of Union St. off the Uniroyal/Crompton property.