Wilsonville Report

:- \\\\'\\\\ 1\\\\ WATER QUAUTY SOURCE INSPECT10N FORMr- ",,_.~,OREGON DEPARTMENT OF ENViRONMENTAL QUALITY ~fIi"flf Source Address: 9275 SW Tauchman Road , ,:jjIi.CiiII~ty~~@Ei."irii::.-:-:f::W=ilso"'~n-V-:ill:-:-e-:S=T=p:------------t Source Phone ,: 503-E382.0115 ":~I Flii>, (altelD AI): ,97952 MailIng Address: 30000 &N Town Center loop, , Wilsonville, OR 97070 Cate inspected; July 7. 2004 OffIcial COl'\\\\tactedfTlUe; Dan Snyder, Plant Supervisor Mike Greeli, Environmental Services Program I .. '" ..;,,,, .," _ , ,WIlle IJllchlrae UmlIlUons [X] I,~,.;:,~~.. ',1: 1:, J " '=~B'ndRecrortlng;. ~ ,[X] .. ~':~~ _' . '.' ' " '~'::;' C~1l10nS . IX] __ .. 'f "', _. ,:~=~~nd'~: '., [X] '. 'a, ", I OM ' . ;[X] : ":,' i "I I ,.' ; .;;, '., "'~ ~ ­:.­"~, I ? ~'~ '.5 HRS TME: 3,HRS (Incfude'travel time) "uL1..pn,u~T1Me:i 2,HRS (write-up, enforcemen~) ,an1llttee-.':" ,', "0 WQ ule CoordInator 0 Other: __~ Sample5 Taken: YES NO tXJ SPUT' , System CI,uslncltlon: Treatment: IV Collection: III Met 'with Dan ,shyder at the wa~tswater treatment plant. Mr. Snyder introduced Mike Green who ' recently replaced Ron Morrow as th,e Environmental Serviees Manager for the olty, Mr. Green is. presently the manager of the Willamette River drinking water treatment facility operated for tne CIty under contract with US Filter. His responsibilities have been expanded to cover the wastewater plant also for now. Mr. Green ,a4Xompanled Mr, Snyder and Ion a plant walk through to leam more about ooncerns at thIs site. The headworks continlJe to have ongoing maintenance 1ssues and provide a SOUTce for IJncqntrolied fl1g1tl~e qd()rs. Mr. Snyder noted that the biofiter continues to work well for addressing odors captured off the solids storage basins. The wood chip volume has been reduced by nearly a quarter since the biofilterwas put in service. No current plans to add additional media at this time. Grease issues are most apparent in the aeration basin where surface foam accumulates over the anoxic area of the basin. Persistent foam is often seen In assooiation with grease JOlling I bacteria {like Nocardia). The surface foam is routin~ly broken up but takes little time to reb~ild. If left, the foam can develop Into an odor problem as it degrades, Mr, Snyder pointed out the clanfier sweep n ,... >;c:: o...., E Ul o :;) < ro f"Tl :;) ;;; x ~ VJ I Vl 25 I ~ r-v attached wash sysl~m. As shown in the photos this wash system does a remarkable job keeping the?{? algae growth froJ]1 accumulating on the effluent weirs and channel side walls. The secondary clarifier '"0 without the wash..system has been scheduled for upgrading this summer. Maintenance of the three -..J sand filters was discussed and the city rotates usage on a three week schedule with one filler offline for maintenano.e eat;h week while t~e ether two are in servIce, Without thIs attention, the filters ~ performance is noticeably reduced.and can cause difficulties with meeting the disinfection limitations. Wilsonville is also inve,slgaling sludge thickening processes to reduce the volume or solids for ..... storage and removal. laboratory Manager Ron Larsen assisted in getting split samples. 24 hour Vl .....composites or Influent and effluent were split and a grab sample was also split. The results are -..J attached. ' :-0 ~--------------------------D--C-O-N-rl-Nu-E-O-O-~-A-rr-A-c-H-E~O-P-A-OE~--------------------------~ Inspecter'. Nama: Lyle W. Christensen Region & Offlc.~ Northwest Region Inspector'. Slgna~,I1"~ O.te: July e, 2004 wilsonville report p1 wilsonville report p2