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HomeMy WebLinkAboutCorrespondence PLANNER 2/28/2008 :City of Springfield Development Services'Department 225 Fifth Street Springfield, OR 97477 . , MEMORANDUM To:. Development Review Committee From: Molly Markarian, Planner II. Date: February 28, 2008 Subject: DRC2007-00080.Rosboro Lumber Condition 6f Approval #2 . On February 8, 2008, .the City issued a decision on Case No. DRC2007-00080 for a Minor Site Plan Modification to the Rosboro site. Condition of Approval #2 of that decision stated that "prior to operation of the modified area of the site, the applicant shall propose and receive approval from the City of Springfield Puhlic Works Department for a pretreatment upgrade to the affected stormwater system...." The applicant has submitted the attached proposal for a pretreatment upgrade to the affected stormwater system. Please review the proposal and provide written comments to me no later than March 6. 2008. . If. you have any questions or concerns, feel free to contact me at 72'6-4611 or email me at mmarkarian@cLspringfjeld.or.us.. Thanks for your tim~ly review! cc: Jesse Jones George Walker: ]~~~] 2-2U8 By i' , Rosboro Growing Today. Building Tomorrow.@ February 27, 2008 City of Springfield Planning Department Attn:Molly Markarian Re: Minor Site Plan Modification. Case Number DRC2007-00080; Condition # 2. Dear Molly, In response to the above case number, we would like to submit the attached Stonn Water Management proposal for your review and approval. The proposal is outlined on page one. The drawings show the proposed modifications. Please contact me with any questions you may have. Sincerely, t~""TJ r ~~~-~~] BySto'vt4t ~ .~p~ Cc: Jim Daniels, Rosboro Mark McKechnie, Oregon Arch~eclure PO Box 20 Springfield, OR 97477-0086 (541) 746-8411 Engineering Fax: (541) 746-7224 YI\fMI.rosboro.com ' Kiln Project Stormwater Management . Rosboro currently employs a system of Best Management Practices (BMP's) as described in the Oregon Department of Environmental Quality's Best Management Practices for Storm water Discharges Associated with Industrial Activities, revised Jan. 2001. These combined BMP'sare designed to achieve the discharge benchmarks established by DEQ in Rosboro's 1200-Z General NPDES Stormwater Permit. The applicable BMP's are as follows: . . BMP# CS3: Storeall fluids under cover and within secondary containment. . BMP# CS7: Use lined grease containers and properly dispose of the liner. . BMP# CS 15: Sweep paved roads, parking lots and storage areas with a vacuum sweeper incorporating exhaust air filtration. . BMP# CS21: Educate employees on potential adverse impacts of the business. . BMP# CS22: Practice good housekeeping for materials stored outside. The system ofBMP's meets the requirements ofEDSPM 3.03.3.B. Previous stormwater testing at the outfall has shown that the implementation of the BMP's listed above has achieved more than 70% reduction of the total suspended solids in the runoff. Rosboro proposes to further upgrade the affected stormwater system by implementing BMP# CS II: retrofit the current drains to standard sediment and oil trap catch basins. Rosboro will install three.Sand Collector Catch Basins supplied by Gibson Steel Basins (see attached drawing). The catch basins will ensure pretreatment of stormwater runoff prior to discharge into the public stormwater system. The industrial conditions at the site, including the lack of anyon-site landscaping areas in the modified area of the site, make it impractical to treat stormwater using vegetative methods. Given the effectiveness of the other BMP's, we request that you waive the vegetative treatment requirements as allowed under EDSPM 3.03.6. ]U~ua),1 :.J I 2-21~08 By_ j ..,1 0 '~l l I ou TLE- j L? ;~2;.~ ,.- 1- r'- N~I . "l ; OUTLl r T z " '~I .l.- 5J" 1- -1 ~-----~-----~! :]' : ~i j _ -'::'-'::'-.:::='-'::'- '---.L 48; LONG 1 ~ .JIO DIAMOND "A T - -I '\ ,lJPPORTS AASHO ~2::, LOADIi',C PLAN VIEW \ BIKe l'IWOf, IlAVY ~u,..y rRA~ KA ",~~PPORTS AASiTO \5 LOADS - ~ ~ .... -1 -,.. , , , , , , , , _J ~ CREASE TRAP j " , , , , I , I__...J , , , , , , , , , r;REI<S, ~RAP ."6 HINC:' u '~'! I --'- 404 - - ,11)[ VIE W rA TF AF 'r;:OVED ~ I " j I ( ( " I ". vG p I " L' ,lAN ;J. Oti ", "'I'. 10;, ,~ ,- ",'4t 0' "" ;/j ". N0 fE S: BOX '0 Al3RIC A TED FROM A.:-/.'\ RiAl ISOME TRll ASPH'\L T DIP"! [') rilt.. 4LiJB n ~ -l ru~@~DW~~ lli1J qv 2-2.1-0g I I I I I \ : N' ,i I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I NOTE: : \TO OUTFA' : MONITORING POINT ~ \ :~' '),.,:>'0 '),.,:>"\ I r.-/ / ] I r:Y c;'O I :' ~. ~ISTiNa(L1NE' J : \ ~ .~, > 1+' ~ PAV~llo \ L / ~\ 'J----G) I' \ '-.' ~ -NEW 8"~ LINE : \'" ~ i 'Xli '\! -- ~ = I r Z i ~ '" - - -\ I I I I I I I I I I '-., I I I I I I I I I w z <( -' z <( ~ (f) w o W Q. u 0:: "- <( '" l- PAVED \ ASPHAL T & CONCRETE SLABS WILL BE ENGINEERED TO DIRECT FLOW TO CATCH BASINS AS SHOWN. I'~~<' 00 0 , 8 ~ J I ~' REST] r ""ST I ROOl,4S 'OCUS " / ] - it ""'" _ s....u~j:"j:",,<: NEW BLDG r ( H~:HT ~ PAVED o~ ~ . 'r~-.J , 1- ~~ ~,- pm ~UL'" SAW " I"'" ,. I LAM BEAM MFG PLANT ~ h q I ElREAKDOWN ...REA ~ I ~ PAVED (- ~ SURFACE FLOW \ ITEMS: (0 ELIMINATE CATCH BASIN, REPLACE W/ CLEANOUT 0) NEW 24X48 SAND COLLECTOR CATCH BASIN 0) ELIMINATE EXISTING CATCH BASIN. G) DOWNSPOUT FROM NEW/EXISTING BUILDING INTO NEW STORM o NEW 8"~ STORM DRAINAGE LINE o NEW 24X48 SAND COLLECTOR CATCH BASIN - RUNOFF FROM o ELIMINATE EXISTING CATCH BASIN. o NEW 24X48 SAND COLLECTOR CATCH BASIN .GJF I:i' SURFACE FLOW ~ -\-- SLOPE APPX 1/16" PER FT \ , SURFACE FLOW , INFEED TR~~ / SLAB \ ~" SUREA~F Fl nw _ '''0' ,() \ /""'-" \ c'Pt'" &' LINE ) FH.J kiLN A kiLN "B EXISTlNG'lINE ( PAVED SURFACE FLOW SURF ACE FLOW SLOPE APPX 1/16" PER FT ---> KILNC KILN 0' KILN. E 104' ~ PAVED \~ ... + I"lYORAN T + :* \ \ c;'O EXISTING LINE & CATCH C ' <- PAVEMENT & EXISTING BUILDING ROOF BASINS -----........... -....---..-..... ----......-... ---....,~._,..- ~~=::::-.:.. -'>., ...-.....--. ~--_..._.- SURFACE FLOW OUTFEED TRACKS / SLAB _SU!lEACLFLOW__ 13Q' PAVED ,COMPRESSOR ROOM SURF ACE FLOW \/\ IIFEEDE.1 , 0 , 0 , 0 , 0 , 0 o '0 w :r: U1 w , 0 Z <( D::: U , 0 , 0 , 0 ~ , 0 , 0 , 0 , 0 , 0 c;'O ~'" '1" , '1" I '1" "/' '1" 7p' '1" op' ,,,,,. I LJ L...I-'-: - - - - - - - - , 0 Rosboro Growln. Todoy. Ilulklln. Tomorrow," '.a.....~OII1<n_.~'IJ_"'f..~'J'.....nZf ~ ",'" c'O .,j.' 'J ,,-v ~J, =C;~"'__, ~ -I:i' I~ "''0 [' 0 --Ji __ (f) -~ ~ -' "- w -J~ - :::> (f) - PAVED '" o -' _A~ -/ :::> __ (f) -]UI<BU] 2-'2.'1 ,ort By ACAOruJlAlOE: =-~ u.sl P\.O~ Q,t.'(to -1-1- ~'SCAlL: .-. ROS80RO SPRINCf1ELO, OREGON SPRINCf1ElO KILN rACIUTY REMOOEL STO/llll.~TI;II_-OfTPIlOPOS.ll. -.. ..""" -. 1- W/OD 1-- -"1o.!I_l 1=