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HomeMy WebLinkAboutSD-23-05 - Supplemental - 0760 Shelburne Road (53)1 Marla Keene From:Jay Nadeau <jay.nadeau@champlainwater.org> Sent:Tuesday, March 7, 2023 2:29 PM To:Monika Ingalls Cc:Dave Wheeler; Marla Keene; Max Murray; Jay Nadeau Subject:RE: 'EXTERNAL'Meadowland Lot 7 Attachments:C2.2 - Proposed Conditions Grading & Drainage Plan.pdf Hi No comments other than we want to notify the SBWD when the test pitting is performed and that there must be at least 4” of foam board insulation between the SW pipe and W pipe. Thanks Jay Nadeau Distribution Division Director Champlain Water District Direct: (802) 861-4817 Cell: (802) 497-7195 From: Monika Ingalls <moingalls@southburlingtonvt.gov> Sent: Tuesday, March 7, 2023 8:10 AM To: Jay Nadeau <jay.nadeau@champlainwater.org> Cc: Dave Wheeler <dwheeler@southburlingtonvt.gov>; Marla Keene <mkeene@southburlingtonvt.gov> Subject: FW: 'EXTERNAL'Meadowland Lot 7 This email originated from outside of the District. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Jay, The plans for Meadowland Lot 7 have been updated to include a new catch basin from Bowdoin St to the proposed stormwater treatment. There is now a storm pipe that crosses an existing water line. Do you have any comments on this? Thanks, Monika Ingalls Stormwater Project Manager Department of Public Works City of South Burlington 104 Landfill Road South Burlington, VT 05403 (802) 658-7961 Ext. 6108 Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation. 2 From: Andres Torizzo <andres@watershedca.com> Sent: Tuesday, March 7, 2023 8:03 AM To: dmarshall@cea-vt.com; Monika Ingalls <moingalls@southburlingtonvt.gov>; 'Thomas Adler' <tadler@watershedca.com> Cc: sleppert@cea-vt.com; Dave Wheeler <dwheeler@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Monika, As Dave mentioned I sent a message to Aaron about our planned approach and have not heard back. Given the State is closed today I probably will not have word back until tomorrow at the earliest. I am confident that this approach will work for 9050 compliance, however. Attached I have provided an updated model that conforms to the latest plan attached. The “DA_CB6” node represents the additional area routed into the system. All applicable criteria should still be met. With the hearing this evening it would be great to get your approval on this. Please let me know if you have any questions or need anything else. Thanks! Andres From: David Marshall <dmarshall@cea-vt.com> Sent: Monday, March 6, 2023 2:31 PM To: 'Monika Ingalls' <moingalls@southburlingtonvt.gov>; 'Thomas Adler' <tadler@watershedca.com>; 'Andres Torizzo' <andres@watershedca.com> Cc: sleppert@cea-vt.com; 'Dave Wheeler' <dwheeler@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Hi Monika- Andres is checking with Aaron, but in the meantime, we have attached a plan showing the proposed CB off of Bowdoin Street for the mass balancing effort. Best Regards David S. Marshall, P.E. Civil Engineering Associates, Inc. 10 Mansfield View Lane South Burlington, VT 05403 P 802-864-2323 x310 F 864-2271 From: Monika Ingalls <moingalls@southburlingtonvt.gov> Sent: Monday, March 6, 2023 12:17 PM To: dmarshall@cea-vt.com; 'Thomas Adler' <tadler@watershedca.com>; 'Andres Torizzo' <andres@watershedca.com> Cc: sleppert@cea-vt.com; Dave Wheeler <dwheeler@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Hi Dave, Thanks for sending this along. I discussed with Dave W. and generally we are okay with the idea of adding a catch basin along Bowdoin St to capture impervious area from the street to site balance with the area not being captured on the site. Have you had any discussions with Aaron regarding the site balancing? Will this require the City to be a co-applicant for the State permit? 3 Thanks, Monika Ingalls Stormwater Project Manager Department of Public Works City of South Burlington 104 Landfill Road South Burlington, VT 05403 (802) 658-7961 Ext. 6108 Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation. From: David Marshall <dmarshall@cea-vt.com> Sent: Friday, March 3, 2023 3:15 PM To: Monika Ingalls <moingalls@southburlingtonvt.gov>; 'Thomas Adler' <tadler@watershedca.com>; 'Andres Torizzo' <andres@watershedca.com> Cc: sleppert@cea-vt.com Subject: RE: 'EXTERNAL'Meadowland Lot 7 Hi Monika- I apologize as I was thinking that the solution for the mass balancing was on a different part of the property. What is inserted below is what Thomas and Andres had previously asked (as part of the mass balancing approach, if we could regrade the Lot 7 east entry to allow runoff from Bowdoin Street into the property. I am not comfortable with this as it would require the lowering of the sidewalk in a manner inconsistent with City typical street section standards. The next question is whether a CB could be added on the east side of the sidewalk to direct this flow from Bowdoin Street into the Lot 7 system. I am okay with this but this 4 needs to be worked through with the Stormwater Utility. Your thoughts? David S. Marshall, P.E. Civil Engineering Associates, Inc. 10 Mansfield View Lane South Burlington, VT 05403 P 802-864-2323 x310 F 864-2271 From: Monika Ingalls <moingalls@southburlingtonvt.gov> Sent: Friday, March 3, 2023 2:59 PM To: Thomas Adler <tadler@watershedca.com>; dmarshall@cea-vt.com; 'Andres Torizzo' <andres@watershedca.com> Cc: sleppert@cea-vt.com; Marla Keene <mkeene@southburlingtonvt.gov>; Marty Gillies <mgillies@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Thanks for forwarding along Thomas. Dave, in a prior email you said that you have addressed the comment regarding the treatment of 2500 SF of impervious at the southern entrance. I don’t see that on the site plan that was sent to me, but maybe I am missing something. Let me know what is proposed for this area. I also noticed that there are now two highlighted sections on the existing sidewalk and shared use path that seem to indicate new impervious at both entrances. Is this just to indicate that the sidewalk will need to be replaced during construction? Thanks, 5 Monika Ingalls Stormwater Project Manager Department of Public Works City of South Burlington 104 Landfill Road South Burlington, VT 05403 (802) 658-7961 Ext. 6108 Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation. From: Thomas Adler <tadler@watershedca.com> Sent: Friday, March 3, 2023 2:25 PM To: dmarshall@cea-vt.com; 'Andres Torizzo' <andres@watershedca.com> Cc: sleppert@cea-vt.com; Monika Ingalls <moingalls@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Hi Dave, Please see the attached O&M plan From: David Marshall <dmarshall@cea-vt.com> Sent: Friday, March 3, 2023 12:54 PM To: 'Andres Torizzo' <andres@watershedca.com> Cc: sleppert@cea-vt.com; 'Thomas Adler' <tadler@watershedca.com>; 'Monika Ingalls' <moingalls@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Hi Thomas- Any luck in taking care of the remaining O&M item? Thanks! David S. Marshall, P.E. Civil Engineering Associates, Inc. 10 Mansfield View Lane South Burlington, VT 05403 P 802-864-2323 x310 F 864-2271 From: David Marshall <dmarshall@cea-vt.com> Sent: Wednesday, March 1, 2023 4:11 PM To: 'Andres Torizzo' <andres@watershedca.com> Cc: 'sleppert@cea-vt.com' <sleppert@cea-vt.com>; 'Thomas Adler' <tadler@watershedca.com>; 'Monika Ingalls' <moingalls@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Hi Thomas- 6 Monika was wondering how the remaining information for this application was coming along? This has gotten to a critical path as Staff is looking to advise the DRB on the sign-off by the City Stormwater utility on this. The additional capture and treatment of the 2,500 SF at the south entrance was integrated into the site plan we sent on to Monika Open items appear to include the O&M plan. I have attached the EPSC Plans and supporting detail and narrative. Thank you and Best Regards David S. Marshall, P.E. Civil Engineering Associates, Inc. 10 Mansfield View Lane South Burlington, VT 05403 P 802-864-2323 x310 F 864-2271 From: Andres Torizzo <andres@watershedca.com> Sent: Monday, February 20, 2023 9:42 AM To: 'David Marshall' <dmarshall@cea-vt.com> Cc: sleppert@cea-vt.com; 'Thomas Adler' <tadler@watershedca.com> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Dave, Looping us together here so we can keep the remaining items together. 1. Monkia approved the 12” sand bed so good there 2. Monika asked for a 12” stone bed underneath the sand for the UD. Don’t see why that is such an issue but will let you evaluate Dave. 3. Thomas sent a redline of an idea for collecting a part of the road to address Monika’s concern about the untreated impervious area. We are waiting to hear back from you to make sure it can work. 4. Thomas will prepare an O&M plan 5. We will need EPSC and details From: Monika Ingalls <moingalls@southburlingtonvt.gov> Sent: Friday, February 17, 2023 3:21 PM To: Andres Torizzo <andres@watershedca.com> Cc: 'David Marshall' <dmarshall@cea-vt.com>; Dave Wheeler <dwheeler@southburlingtonvt.gov>; 'Mark Neagley' <MNeagley@neagleychase.com> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Hi Andres, Dave and I have discussed your response and agreed that if you discuss with the State and Aaron okays a 12” sand filter bed for this design as opposed to 18”, then we are okay with that. The 12” filter bed should allow for a 12” stone layer while meeting the requirement for 18” of cover denoted on the chamber details on Sheet C4.3. 7 Thanks, Monika Ingalls Stormwater Project Manager Department of Public Works City of South Burlington 104 Landfill Road South Burlington, VT 05403 (802) 658-7961 Ext. 6108 Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation. From: Andres Torizzo <andres@watershedca.com> Sent: Wednesday, February 15, 2023 2:06 PM To: Monika Ingalls <moingalls@southburlingtonvt.gov> Cc: 'David Marshall' <dmarshall@cea-vt.com>; Dave Wheeler <dwheeler@southburlingtonvt.gov>; 'Mark Neagley' <MNeagley@neagleychase.com> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Hi Monkia, please see my replies below. It would be helpful to get your feedback on bullet reply #2 before we finalize the rest of the documents. Thanks. From: Monika Ingalls <moingalls@southburlingtonvt.gov> Sent: Wednesday, February 15, 2023 1:27 PM To: Andres Torizzo <andres@watershedca.com> Cc: 'David Marshall' <dmarshall@cea-vt.com>; Dave Wheeler <dwheeler@southburlingtonvt.gov>; 'Mark Neagley' <MNeagley@neagleychase.com> Subject: RE: 'EXTERNAL'Meadowland Lot 7 Hi Andres, Thank you for forwarding this along and providing more information on the proposed stormwater treatment practice and consideration given for Tier II treatment. I have a few comments/questions on the current stormwater design, bulleted below:  Impervious area treatment: There is approximately 2,500 SF of impervious surface that isn’t conveyed to the proposed treatment system on the southwest corner of the project site. Are there any opportunities to provide additional treatment through site balancing to offset the impacts of this untreated new impervious area? We are presently evaluating a few options and will respond back shortly.  Sand filter: Per the VSMM, the underdrain for the sand filter should be in a 12” thick stone layer and the sand filter layer should be extended to 18”. Based on some quick calculations, I think the grade of the western parking area will need to be raised to ensure that the proposed chambers will then have the minimum 18” of cover over them as shown on the detail sheet. Please note the VSMM allows for a 12” thick sand bed under the “perimeter filter” variant. See 4.3.4.4. Because vertical depth is so constrained on this site placing the underdrain at the bottom of the sand filter is the preferred option. Holes in the perforated drain can be specified in the downward position such that the level of treatment will not be impacted and the full depth of the sand filter can be utilized. Note DEC has approved several designs in this configuration. 8  Pretreatment: Just to confirm – will an isolator row be used for pretreatment? Correct  Detail Sheets: Please provide updated detail sheets for stormwater/site features Will be provided ASAP  EPSC: Please forward along updated EPSC plans/details for the proposed project. The most recent copy we have are from November 2022. Will be provided ASAP  O&M Plan: Just a reminder that we will need this, as you stated in the previous email. Will be provided ASAP Let me know if you have any questions on my comments above. Thanks, Monika Ingalls Stormwater Project Manager Department of Public Works City of South Burlington 104 Landfill Road South Burlington, VT 05403 (802) 658-7961 Ext. 6108 Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation. From: Andres Torizzo <andres@watershedca.com> Sent: Friday, February 3, 2023 4:56 PM To: Monika Ingalls <moingalls@southburlingtonvt.gov> Cc: 'David Marshall' <dmarshall@cea-vt.com>; Dave Wheeler <dwheeler@southburlingtonvt.gov>; 'Mark Neagley' <MNeagley@neagleychase.com> Subject: 'EXTERNAL'Meadowland Lot 7 This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email. Monika, Getting back in touch about the Meadowland Park Lot 7 project. You had inquired about a Tier II analysis for this site given the latest treatment system was a subsurface sand filter with underdrain (Tier III). We have reassessed the site using the Water Quality Practice Selection – Feasibility Considerations section of the 2017 VSMM to evaluate the potential for incorporating a Tier II practice on this site. We evaluated open space areas on the project site including the area to the west of the proposed parking lot adjacent to the wetland buffer, and the planter bed area adjacent to, and east of, the building. Each of these areas we deemed not feasible for a Tier II surface feature. In the case of the open space to the west of the parking lot, this area has historic fill and needs to be regraded for DEC wetlands. The area near the building needs to be planted with trees and is not adequately large enough. That had left us with the option of adding a subsurface Stormfilter system to our treatment train approach which has been approved as Tier II in the 2017 VSMM as an Alternative Treatment Practice. The full WQv is treated via the sand filter and then passes through the Stormfilter for polishing treatment. 9 The treatment system manages the full WQ and provides peak flow reduction for the 1, 10, and 25 year storm events. I have attached the native model, drainage maps, and the site plan to this email. If this design is acceptable, I can develop an O&M plan on Monday. Please let me know at your earliest possible convenience if you have any remaining concerns with the proposed design. Thanks, Andres Andres Torizzo Principal Watershed Consulting Stormwater Management | Water Quality | Green Infrastructure 208 Flynn Avenue Suite 2H Burlington, VT 05401 P.O. Box 4413 Burlington, VT 05406 Mobile: 802.922.4871 | Main: 802.497.2367 www.watershedca.com andres@watershedca.com Notice – Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning District business, concerning a District official or staff, or containing information relating to District business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation.