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From: Gomez, Martin H [mailto:martin.h.gomez@boeing.com] <br /> Sent: Monday, April 11, 2016 10:00 AM <br /> To: Jane Zimmerman <br /> Cc: Page, Gayle M; Tyler, David D; Larmay, Russell T <br /> Subject: RE: Preliminary Stormwater Design for 45-61 Building <br /> Jane, <br /> Thank you for your quick response. For clarity's sake, in the end of your response when you mentioned impervious <br /> credit within Powdermill,are you implying a re-siting of the building in order to utilize existing credits within Powdermill <br /> Gulch or doing a basin swap between the Japanese Gulch and Powdermill Gulch drainage basins?Clarification on this <br /> subject will help us figure out a path forward. <br /> Thanks again for your help with project. <br /> Sincerely, <br /> Marty Gomez EIT <br /> The Boeing Company <br /> Facilities Plant Engineer/Project Management <br /> Phone 425-387-7126 <br /> Email martin.h.gomez@boeing.com <br /> From:Jane Zimmerman [mailto:JZimmerman@everettwa.gov] <br /> Sent: Friday,April 08,2016 9:57 AM <br /> To:Tyler, David D<david.d.tyler@boeing.com> <br /> Cc:Gomez, Martin H<martin.h.gomez@boeing.com>; Page, Gayle M <gavle.m.page@boeing.com> <br /> Subject: RE: Preliminary Stormwater Design for 45-61 Building <br /> Hi Dave— <br /> Unfortunately,the bulleted list in Section 2.2.7 of the City's Manual contains some critical omissions that completely <br /> change what the section means. Per the City's NPDES Permit—which over-rides the manual—there is a comma and an <br /> "or" after each of the first two items—please see my additions to your list below. That means that if any one of those <br /> thresholds apply,flow control is required—the last item does not need to be true also. In addition,the only way to <br /> render an impervious area "ineffective" is to achieve full dispersion of the runoff in accordance with Ecology BMP T5.30 <br /> (which requires 65%of the drainage area to have native vegetation)or to fully infiltrate the runoff in accordance with <br /> Ecology criteria. <br /> Are all y'all sure you can't find some impervious area "credit" in the Powder Mill pond design—just enough to get you <br /> under 5,000 square feet in the Japanese Creek basin—so that I can approve this project without making you do <br /> something that just doesn't make sense? Or might shallow infiltration areas in the grass get you where you need to be <br /> with respect to effective impervious area? I'm sorry, I really am,that this project has turned into such a hairy big deal. <br /> By the way,this type of situation is the main reason I'm looking to retire absolutely as soon as possible—stormwater <br /> regulations don't make sense anymore and I'm embarrassed to have to enforce them. And it's just going to get worse <br /> on January 1,2017... <br /> Thank you, <br /> Jane <br /> 3 .� <br />