From: 	Steve Long <stevel@opechee.com>
To:	'Jean Fraser' <JF@portlandmaine.gov>
CC:	Greg Kirsch <gregk@opechee.com>
Date: 	5/30/2012 5:23 PM
Subject: 	RE: Phase II Dev. - Jordan's Meat site
Attachments:	C05 Mixed Use Grading Plan 05-29-12.pdf; C06 Mixed Use Erosion Control 05-29-12.pdf; SWPPP Jordans Phase II Site Portland 05-29-12.pdf

Jean

Per the comments received Thursday I would like to submit the following:

1)      In accordance with Section 5 of the City of Portland Technical Manual, a Level III development project is required to submit a stormwater management plan pursuant to the regulations of Maine DEP Chapter 500 Stormwater Management Rules, including conformance with the Basic, General, and Flooding Standards:

a)      Basic Standards: A detail should be provided for the compost filled silt sock noted on the erosion control plan. Notes should be provided on the plans to address erosion and sediment control requirements, inspection and maintenance requirements, and good housekeeping practices in accordance with Appendix A, B, & C of MaineDEP Chapter 500.
A revised Erosion Control Plan is attached. A detail of the compost filled silt sock has been added to the plan. Notes have also been added to this plan to address erosion and sediment control requirements, inspection and maintenance requirements, and good housekeeping practices

b)      General Standards: The project includes re‑development of existing impervious areas that were in existence prior to the demolition of the Jordan's Meats facility. The project also includes 3,142 square feet of new impervious area that was not in existence prior to that time. The re‑developed, formerly impervious areas of the site qualify for an exemption from meeting the General Standards. However, the Applicant must provide stormwater treatment in accordance with the General Standards for an area equivalent to the proposed 3,142 square feet of new impervious area.
A revised Grading and Utilities Plan is attached. A Tree Box Filter has been added along the Middle Street. The location is shown on the plan and a detail has been added. Placing the Tree Box Filter at this location will allow it to treat approximately 3,200 square feet of existing pavement from Middle Street. I discussed this with Dave Cenas and David Margolis‑Pineo who were agreeable to this solution. David Margolis‑Pineo would like us to perform the post construction inspection and maintenance as part of our post construction stormwater maintenance plan.

c)     Flooding Standards:
In discussing this with Dave Cenas he felt that the increase in flows in comparison to the previous Drainage Analysis, performed by Sebago Technics, were negligible and he would support a waiver of this requirement. Therefore as allowed per Section 5. III 4 E 2(b) of the City of Portland Technical Standards we would like to request a waiver of the Flooding Standard because there are insignificant increases in peak flow rates from the project site.

1)      The Stormwater Management Plan should include a stormwater inspection and maintenance plan developed in accordance with and in reference to MaineDEP Chapter 500 guidelines and Chapter 32 of the City of Portland Code of Ordinances.
A revised Storm Water Pollution Prevention Plan is attached. It now includes a stormwater inspection and maintenance plan in accordance with and in reference to MaineDEP Chapter 500 guidelines and Chapter 32 of the City of Portland Code of Ordinances. A copy of Chapter 32 of the City of Portland Code of Ordinances has also been added to the Appendix of the document.

I hope this addresses the concerns related to stormwater. Please let me know if you have any questions or require additional information.

Thanks

Steve Long
Opechee Construction Corporation
11 Corporate Drive
Belmont, NH 03220
P (603) 527‑9090
F (603) 527‑9191