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Gabriel Gonzalez [EH] <br /> From: Gabriel Gonzalez [EH] <br /> Sent: Wednesday, December 31, 2014 2:00 PM <br /> To: 'Scott' <br /> Subject: RE: Hammer Lane site <br /> Thank you for the information Scott. I will note the information below and discuss it with our geologist when I receive <br /> the 4th quarter status report. <br /> Gabriel <br /> From: Scott [mailto:SBittinger(astratusinc.net] <br /> Sent: Wednesday, December 31, 2014 1:54 PM <br /> To: Gabriel Gonzalez [EH] <br /> Subject: Hammer Lane site <br /> I've been discussing this in the recent reports, but I believe that this site warrants closure consideration. We have been <br /> running an ozone injection system for 27 months or so. Over this time, groundwater contamination levels have <br /> declined, and for the past three quarters (2nd/3rd/41h) benzene levels in groundwater have been below the 3,000 ppb <br /> level required for closure under the low threat closure policy. <br /> It certainly doesn't hurt to keep pumping ozone into the ground, but at some point the benefits are going to diminish. If <br /> you would, please keep this in mind when you receive the 4th quarter status report. <br /> Scott <br /> 1 <br />