JWM&A Comment re Appeal of MDNS 001JWM&A
Jerome W. Morrissette & Associates tnc. P. S.
1700 Cooper Point Road S W, #B-2, Olympia, W A. 98502-1110
(360) 352-9456 • (360) 352-9990
November 7, 2005
Mr. Gran[ Beck
Community Development Director
City of Yelm
105 Yelm Avenue W.
P.O. Box 479
Yelm, Washington 98597
Re: Appeal of the Mitigated Determination of Non-Significance
File Number SPR-OS-0160-YL and BSP-OS-0197-YL
Dear Mr. Beck;
This letter is to request the following information added to the public record for the above
referenced project:
Grant Beck stated the there were other methods to treat the stormwater, other than alternative
technologies. The other method he stated, I believe, was underground vaults. The underground
vaults, or wet vaults as [hey aze called, detain the stormwater as a treatment method, but then the
stotmwater must be directed to an infiltration pond or gallery for disposal, or meter release
towazds the creek at a rate no greater than it does prior to the development. These underground
vaults require similaz maintenance as the alternative technologies. They also perform similaz
treatment, a means [o allow solids to settle and retain oil or grease. A vactor [ruck or similar
means must be used for maintenance for both the wet vault and V ortechnics treatment device
systems.
Shonld you have any questions or require additional information, please contact me at (360) 352-
9456.
~) q~` /
SIGNED: r~_.~Ckiasr/-~
Robert Tauscher, P.E.
Project Engineer
C Mr. Bding Birkland, 36 & C, L.L.C., Y.O. Hox 875, Yelm, WA 98597
C:\nob'sh'iles\05177 W esl Rd Bosinas Park\Correspoadenw\ 110705 Leller to City additional lestimony.doc
Civi! ~ Municipal x Geolechnicol Engineering and Planning