ELL Nick <br />From: <br />GILLESPIE Scott N <br />Sent: <br />Friday, November 17, 2017 11:09 AM <br />To: <br />GIOELLO Nick R <br />Subject: <br />RE: Question for Nick of Stormwater <br />Hi Nick, <br />Please see my responses below. <br />1. EC 9.6791(3)(B)(2) Allows it. EC 9.6793 requires it. EC 9.6792(1) supports it. The City's current <br />NPDES MS4 permit supports it through establishing a green BMP hierarchy that is implemented though <br />EC 9.6792 requiring prioritization of on-site infiltration and the mimicking pre-development hydrology. It <br />is also consistent with state drainage law (civil law doctrine of drainage). <br />2. The 80% is not a goal. Capturing and treating the 80% of average annual rainfall is a requirement of <br />our current NPDES MS4 permit. This is implemented through EC 9.6792 and the stormwater <br />management manual. Flood Control (9.6791), Water Quality (9.6792) and Flow Control (9.6793) do not <br />supersede each other. They are all applicable to this application. However, one criteria or design <br />standard can be used to support another one. For example, a water quality facility can be built larger <br />enough to infiltrate the flood control design event therefore complying with the flood control design <br />criteria. The stormwater standards are designed to intentionally accompany and complement each <br />other and provide flexibility in solutions. <br />3. No, 9.6790 does not require anything. It authorizes the Stormwater Management Manual and the <br />implementation of it according to the criteria in 9.6791 through 9.6797. EC 9.6791, EC 9.6792 and EC <br />9.6793 apply to new and replaced impervious surfaces. <br />Thanks, <br />Scott Gillespie, PE <br />Public Works Engineering <br />99 East Broadway, Suite 400 <br />Eugene, OR 97401 <br />541-682-2706 <br />From: GIOELLO Nick R <br />Sent: Friday, November 17, 2017 9:21 AM <br />To: GILLESPIE Scott N <Scott.N.Gillespie@ci.eugene.or.us> <br />Subject: FW: Question for Nick of Stormwater <br />See questions at the bottom. <br />From: Susan Hoffman [mailto:shortgamesue yahoo.com] <br />Sent: Sunday, November 12, 2017 2:57 PM <br />To: GIOELLO Nick R <Nick.R.Gioello@ci.eugene.or.us> <br />Cc: Susan Hoffman <shortgamesue@yahoo.com>; Cathy Johnson <cdjohnson617@msn.com>; Brent Lorscheider <br /><lorsch2728@pacbell.net>; Tom Bruno <brunoassoc@aol.com> <br />Subject: Fw: Question for Nick of Stormwater <br />Hi Nicki. I won't be home tomorrow at 9 AM so thought I would get these questions out to you today <br />while I'm thinking about it. If any other questions come in to me today, I'll forward them to you this <br />