Inland Wetlands, Water Courses & Conservation Commission

October 4, 2012 Regular Meeting Minutes CITY OF NORWICH INLAND WETLANDS, WATERCOURSES AND CONSERVATION COMMISSION Lower-level Conference Room, 23 Union Street, Norwich, Connecticut Agenda Items A, B & C – Call To Order, Roll Call, Determination Of Quorum: Chairman Raymond Baribeault called the meeting to order at 7:00 p.m. Present: Raymond Baribeault, Chairman Richard Morell, Vice-Chairman Ralph Page Philip Kiley Jeremiah Lowney Art Sharron, Alt Robert McCoy, Alt Absent: Barbara Rothstein Brandon Hyde Douglas S. Lee Also Present: Peter Davis, Director Linda Lee Smith, Recording Secretary It was determined there was a quorum. D. Minutes: Upon motion by Richard Morell and second by Ralph Page the Commission voted unanimously to APPROVE the minutes of the September 6, 2012 regular meeting. E. Communications: NONE F. Public Hearings: NONE G. Old Business: IWWCC #12-12 – activities associated with underground storage tank removal/replacement at the 7-Eleven, 152 Taftville-Occum Road within the 100 ft upland review area. Peter Davis stated that this was tabled from the September 6, 2012 meeting due to the required 30 day public petition period and they didn’t receive any p etitions. Peter Davis explained to the commission that the application was for tank removal and reconstruction of canopies. The entire scope of work is within the 100’ buffer area. Peter Davis explained a silt fence would be installed around the perimeter of the disturbed area. They would first excavate the tanks and material from the site, and then would do some dewatering. They would be installing the new tanks, backfill, some grading and final paving and the installation of the canopies. Peter Davis didn’t anticipate any issues such as material migrating off the site once the silt fence is installed. Art Sharron asked if it had been determined that the existing tank had been leaking? Peter Davis said they will ask the applicant. Peter Davis stated he would like clarification on the dewatering system. Thomas Keough, Wetlands Soil Scientist for AECOM and Luis Ferreira project Manager for 7- Eleven store out of Providence RI presented. Mr. Keough stated they would provide clarification where the dewatering system would be set up and the discharge point will be at a separate location. Peter Davis questioned where the discharge area was going to be. Mr. Ferre ira stated it would be a manifold point at the headwall and it will discharge to the river. They have a secured general permit from the DEEP. There is currently a remediation system at the site. They’ve perform tri-annual ground water sampling events and they’ve been below CT standards. Once they have the fourth consecutive below CT standards the site will be closed. They will periodically retest for 2 years. Mr. Ferreira explained the dewatering system which would have a series of carbon beds, (1) fraction lesion tank for the dewatering to be pumped into tank to feed the carbon vessels that will treat the V-tech constituents. There is also a series of filters to treat the metals, such as arsenic levels at this site and DEEP has agreed that the sampling they believe is background arsenic levels and they will still do treatment for it. The proposed dewatering rate will be 250-300 gpm and max 500 gpm, and reason because sub-service conditions with gravelly sand and close to the river and will have large rate of flow. Peter Davis asked if the existing riprap area would be able to handle the amount of discharge. Mr. Ferreira stated yes they are manifolding their discharge for energy dissipation because there is just (1) 10” outlet with 4 outlets. Richard Morell asked how long the project would take. Art Sharron asked if they would be starting before winter. Mr. Ferreira said the project in entirety with upgrades would take 6 weeks and would begin next spring April 2013 with the dewatering portion consuming 1-2 weeks. Ralph Page asked if there would be any stock piling of material on site. Mr. Ferreira stated they prefer to live load the material, but if they need to stock pile it they will put plastic sheeting on the ground, cover with plastic overnight and remove it within one to two days. They don’t want to take up more space than necessary while the store remains open. Raymond Baribeault stated the excavated material would not be reused on the site and there is no reason to keep it there any longer than they have to. 2  Ralph Page asked if they need to have an indication of the location. Peter Davis stated that they won’t know where they can stockpile it until they begin the project due to the amount of disturbance. Peter Davis stated if in fact they have to stock pile longer than 48 hours that they contact the Planning and Development Office to make them aware of it. He also didn’t think there would be any problems with migration of material because it is flat and they would be keeping it within the area of the silt fence. Upon motion by Richard Morell and seconded by Ralph Page the Commission voted unanimously to APPROVE the application with the condition that if any material is stockpiled in excess of 48 hours to contact the Planning and Development Office. H. New Business: IWWCC #12-13 – Soulor Boswell LLC – 553, 557, 565 Boswell Avenue - CME Associates Inc. – activities associated with the construction of multi-family units within 100 ft of upland review area. Peter Davis stated it would need to be tabled until the next regular meeting, due to the required 30 day public petition period. Upon motion by Ralph Page and seconded by Richard Morell the Commission voted unanimously to TABLE the application until the next regular scheduled meeting of November 1, 2012, in order to comply with the required 30 day petition period. I. New Business items submitted after agenda preparation and prior to the submission deadline: None J. Other Business: NONE K. Violations: NONE K. Adjournment Upon motion by Ralph Page and seconded by Jeremiah Lowney it was unanimously voted to adjourn at 7:13 p.m. Respectfully submitted, Linda Lee Smith, Recording Secretary 3