JWM&A Letter 11-07-05 re Appeal of MDNS Conditions 001JWM&A
Jerome W. Morrisselte & Associates Inc.. P. S
1700 Cooper Point Road SW, NB-2, Olympia, WA. 98502-I 110
(360) 352-9456 •(360) 352-9990
November 7, 2005
Mr. Grant 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 s[ormwater, other than altemative
technologies. The other method he stated, I believe, was underground vaults. The underground
vaults, or wet vaults as they are called, detain the stormwater as a treatment method, but then the
stormwater must be directed to an infiltration pond or gallery for disposal, or meter release
towards the creek at a rate no greater than it does prior to the development. These underground
vaults require similaz maintenance as the altemative technologies. They also perform similar
treatment, a means to allow solids to settle and retain oil or grease. A vactor truck or similar
means must be used for maintenance for both the wet vault and Vortechnics treatment device
systems.
Should you have any questions or require additional infortnatiou, please contact me at (360) 352-
9456.
SIGNED: 6i*-~ t~ _
Robert Tauscher, P.E.
Project Engineer
Mr_ F.rling DirklanQ 3D & C, L.L.C.. P.O. Box 875, Yclm, WA 98597
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