Loading...
2018-027781 ~ 6960 SW Sandburg Street Washington County,Oregon 2018-027781 04/20/2018 03:47:56 PM D-E Cnt=1 Stn=30 RECORDS1 $110.00$5.00$11.00$20.00-Total=$146.00 RETURN RECORDED DOCUMENT TO: IIIIII CITY HALL RECORDS DEPARTMENT „ ,, CITY OF TIGARD 02382311201800277810220229 I,Richard Hobernlcht,Director of Assessment and 13125 SW Hall Blvd. Taxation and Ex-Officio County Clerk for Washington : County,Oregon,do hereby certify that the within 1=,-. ' Instrument of writingwas received a d re orded In the 1i Tigard, OR 97223 book of records of id coin �I �+Pivw•cl �.�' ' Richard Hobernlcht,Director of Assessment and . Taxation,Ex•Officlo County Clerk Space above reserved for Washington County Recording information PRIVATE STORMWATER FACILITIES AGREEMENT eq This Agreement is made and entered into this day of ,2018,by and between the CITY OF TIGARD, a municipal corporation of the State of Oregon (City)and Tigard Tualatin School District 6960 SW Sandburg St,Tigard Oregon 97223(Owner) RECITALS A. Owner has developed or will develop the Facilities listed below. (List the type of private stormwater facilities on site and the quantity of each type). Facility type(list each) Infiltration Planter/Rain Garden Quantity 2 Facility type(list each) Water Quality Manhole Quantity 1 Facility type(list each) Vegetated Swale Quantity 2 existing Facility type(list each) Canister Filter Quantity 1 B. The Facilities enable development of property while mitigating the impacts of additional surface water and pollutants associated with storm water runoff prior to discharge from the property to the public storm water system. The consideration for this Agreement is connection to the public storm water system. C. The property benefited by the Facilities and subject to the obligation of this Agreement is described below or in Exhibit A(Property) attached hereto and incorporated by reference. See Attached Exhibit A, An aerial map of the three properties showing the six approximate locations of the four different facility types.Also shown are the tax ID#'s and tax account#'s of the three properties and the address of the property with the schools on it. The aerial view map is prior to the new improvements. D. The Facilities are designed by a registered professional engineer to accommodate the anticipated volume of runoff and to detain and treat runoff in accordance with Clean Water Service City's Design and Construction Standards. E. Failure to inspect and maintain the Facilities can result in an unacceptable impact to the public Page 1 —Private Storm water Facilities Agreement 50014-36792 6/2/17 I , storm water system. NOW,THEREFORE,it is agreed by and between the parties as follows: 1. OWNER RESPONSIBILITIES. The City shall provide Owner an Operations and Maintenance (O&M Plan)for each facility. Owner agrees to operate,inspect and maintain each Facility in accordance with the current O&M Plan and any subsequent modifications to the Plan. Owner shall maintain a log on inspection activities. The log shall 1. available to the City upon request during City inspections 2. DEFICIENCS. All aspects in which the Facilities fail to satis the O&M Plan shall be noted as "Deficiencies". 3. OWNER CORREhTIONS. .All Deficiencies shall be cors ted at Owner's expense within thirty (30)days after completion of the inspection. If more than 30 days is reasonably needed to correct a Deficiency, Owner shall have a reasonable period to correct the Deficiency so Ion as the eorrection is commenced within the 30-day period and is diligently prosecuted to completion. 4. CITY INSPECTIONS. Owner grants City the right to inspect the Facilities. City will endeavor to give ten(10)days prior written notice to Owner,except tha/no notice shall be required in case of an emergency: City shall determine whether Deficiencies need to be corrected. Owner(at the address provided at the end of this Agreement, or such other address as Owner may designate in writing to City)will be notified in writing through the US Mail of the Deficiencies and shah make corrections within 30 days of the date of the notice. ` // . 5. CITY CORRECTIONS. If correctidn o' all Owner or City identified Deficiencies is not completed within the timeframe set forth in Section 3,City shall have the right to have any Deficiencies corrected.City(i)shall have access to the Facilities for thpurpose of correcting such Deficiencies and(ii)shall bill Owner for all costs reasonably incurred by City for wor performed to correct the Deficiencies(City Correction Costs)following Owner's failureto correct any D iciencies in the Facilities. Owner shall pay City the City Correction Costs within thirty(30)days of the date o e invoice. Owner understands that this is a debt owing to City. In addition, Owner agrees that upon non-payment, City Correction Costs shall be secured by a lien on the Property for the City Correction Cost amount plus inte -st and penalties. 6. EMERGENCY MEASURES. If at any time City yeas e i ably determines that the Facilities create any imminent threat to public health, safety or welfare, City may immee'..tely and without prior notice to Owner take measures reasonably designed to remedy the threat. City shall ,rovide notice of the threat and the measures taken to Owner as scion as reasonably practicable, and if such imm': ent threat arose from a Deficiency with the Facilities, charge Owner for the cost of these corrective m . ures as provided in Paragraph 5. 7. FORC AND EFFECT. This Agreement shall constitute an equitabl: servitude or covenant running with the lanand shall bind all owners of the Property present and future, and eir heirs, successors and assigns. /s 8. ENDMENTS. The terms of this Agreement may be amended only by m►tual agreement of the parties.An amendments shall be in writing, shall refer specifically to this Agreement, and shall be valid only when ecuted by the owners of the Property, City and recorded in the Official Records olthe county where the P perty is located. 9. PREVAILING PARTY. In any action brought by either party to enforce the terms of this Agreement,the prevailing party shall be entitled to recover all costs,including reasonable attorney's fees as may be determined by the court having jurisdiction,including any appeal. Page 2—Private Storm water Facilities Agreement 50014-36792 612/17 storm water system. NOW,THEREFORE, it is agreed by and between the parties as follows: 1. OWNER RESPONSIBILITIES. The City shall provide Owner an Operations and Maintenance (O&M Plan) for each facility. Owner agrees to operate, inspect and maintain each Facility in accordance with the current O&M Plan and any subsequent modifications to the Plan. Owner shall maintain a log on inspection activities. The log shall be available to the City upon request during City inspections 2. DEFICIENCIES. All aspects in which the Facilities fail to satisfy the O&M Plan shall be noted as "Deficiencies". 3. OWNER CORRECTIONS. All Deficiencies shall be corrected at Owner's expense within thirty (30) days after completion of the inspection. If more than 30 days is reasonably needed to correct a Deficiency, Owner shall have a reasonable period to correct the Deficiency so long as the correction is commenced within the 30-day period and is diligently prosecuted to completion. 4. CITY INSPECTIONS. Owner grants City the right to inspect the Facilities. City will endeavor to give ten(10) days prior written notice to Owner, except that no notice shall be required in case of an emergency. City shall determine whether Deficiencies need to be corrected. Owner(at the address provided at the end of this Agreement, or such other address as Owner may designate in writing to City) will be notified in writing through the US Mail of the Deficiencies and shall make corrections within 30 days of the date of the notice. 5. CITY CORRECTIONS. If correction of all Owner or City identified Deficiencies is not completed within the timeframe set forth in Section 3, City shall have the right to have any Deficiencies corrected. City(i) shall have access to the Facilities for the purpose of correcting such Deficiencies and(ii)shall bill Owner for all costs reasonably incurred by City for work performed to correct the Deficiencies(City Correction Costs) following Owner's failure to correct any Deficiencies in the Facilities. Owner shall pay City the City Correction Costs within thirty(30) days of the date of the invoice. Owner understands that this is a debt owing to City. In addition, Owner agrees that upon non-payment,City Correction Costs shall be secured by a lien on the Property for the City Correction Cost amount plus interest and penalties. 6. EMERGENCY MEASURES. If at any time City reasonably determines that the Facilities create any imminent threat to public health, safety or welfare, City may immediately and without prior notice to Owner take measures reasonably designed to remedy the threat. City shall provide notice of the threat and the measures taken to Owner as soon as reasonably practicable, and if such imminent threat arose from a Deficiency with the Facilities, charge Owner for the cost of these corrective measures as provided in Paragraph 5. 7. FORCE AND EFFECT. This Agreement shall constitute an equitable servitude or covenant running with the land and shall bind all owners of the Property present and future, and their heirs, successors and assigns. 8. AMENDMENTS. The terms of this Agreement may be amended only by mutual agreement of the parties. Any amendments shall be in writing, shall refer specifically to this Agreement, and shall be valid only when executed by the owners of the Property, City and recorded in the Official Records of the county where the Property is located. 9. PREVAILING PARTY. In any action brought by either party to enforce the terms of this Agreement,the prevailing party shall be entitled to recover all costs, including reasonable attorney's fees as may be determined by the court having jurisdiction, including any appeal. Page 2—Private Storm water Facilities Agreement 50014-36792 6/2/17 10. SEVERABILITY. The invalidity of any section, clause, sentence, or provision of this Agreement shall not affect the validity of any other part of this Agreement, which can be given effect without such invalid part or parts. IN WITNESS WHEREOF, Owner and City have signed this Agreement. NOTARIZE DOCUMENT BELOW INDIVIDUAL OWNERS SIGN BELOW CORPORATE, LLC PARTNERSHIP,TRUST OR OTHER LEGAL ENTITY SIGN BELOW 1-1 - 0 is((S‘cf Owner(Individual) (Entity nam-) By: (()--,), Owner(Individual) (Sig-n0 here fo entity) Title: "" STATE OF OREGON ) ss. County of .-4 AA AA.A ) [mow This instrument was acknowledged before me on 031-k C9 , 20 16 ,by h\A(1 ( Moore., as CFO ofCity ofTigud. "rra-iUCR IJt c T ®1`S�vt+ !' OFFICIAL STAMP PATRICIA CLAUSEN ROBERTS i NOTARY PUBUC•OREGON NOTARY PUBLIC FOR OREGON N. COMMISSION NO.964285 My Commission Expires: -7 y \ O MY COMMISSION EXPIRES JULY 04,2021 CITY OF TIGARD By: / 0" (City Engineer) Page 3-Private Storm water Facilities Agreement 50014-36792 6/2/17 - -- ---- - irti ----4- ''...---,;--:i ••:',.7likr = !---F.‘„,— S.-2 4,::-2-- • "`"• t :•: -- •' •-, ,,,, • 1 Ati•,1 i ;'.47:: ' ' ' '' ' t ' 144 '` • i ' '..!*‘: 1' 4- • ! ,,,:s. •0 • - ' ''''' 1:1 -. -'+' * - '' -,'- l't-z, . ''',4 7' ' „‘' .• .:'•:,"+•; . ••• • -<:-sn , •- 4 ''Nt , 1 ',' •;• ,'If,,t,. " • •'': ) "',A,''''• ''''• ',44.4 , , '..e.,, •5,:js*.:•:' ' -'•*Nt,i • '.:: ,, ,,, . ,,,,,, „ , , ‘ t, , ,, ,,,,,t,„ 1, . i „ ., I ----; ''' "V.*,, '' _ . _ f4..-'„•-- '^"taifon- 1:', ' : t•• ,• '• ....,,,•,,,,, ,, '",•: ,,i-,-.X411.4,77„:11/4-i;, 4-4ti c:„„),"%,,,,,-; , .,.••--,' ,,..,, ,.._:'' ..- . „i„,.:••,,,A. *,,,,,,,-- i, , ,,,, - j_,,...,,, ,,,,,;4,,,7,1SadibliA, 1,i,„wEveet.., •r., ..,,,,z,.;‘,, - ,,‘•Lii";.-,, ,iN;:l..:‘- , , vi. *iet., 44, ,,,,,,„„.1,,,,\,,,,,,‘ 474 ti, v. ..,,- 4T , pt ,',•tt l';',,'• -,4.:" 7., i ,p ,s. ,, .... •.),-,,. „Nit.", - i = ,,. , .. ‘• ' , - , -4 i '‘, ..f,„'; •' ".-.. (.. , 4,•,,,,,,;,* ,, ,,,t:,,,,, ,›•,,,.a •r. ,.4', t\„i• :‘. .. ,4.•„, St:••-, - 4....',' ki Exhibit A of the private water quality fealties - . -, 7,,ir,,,1 ' •- ',611411, , "‘.. . >4,'t..• t, *:. ,n- ':',-,.-„, ,,,.. , ., ‘, --agreement between the City of Tigard and r ‘ i4... 't'1 • "&?''40 l'•,-• Alit - W't Tigard-Tualatin School Distrid for , ,,,,,„ .,, , e , ,. ,,,• t, , •. . • , ,..i,,,,,4„,,,,,,„*" • cl„, .• :, , _ ,,,„ ,,,, ,,,, s.40, ,,,, ' :,..:41.=, :,,,; , , - .,,L,,-,. .; "" ' • ••1 ''`;, i.r• . ':1 CUP201,7-00002 and PFI2017-00220 „,,,,,I,wi„,,,,-„i, • ,07.10 A ,.„1 ., - ••,: „':''",, ' ,' ,,?;•4::,4*,,r„ • • ••‘• J..' mtdr•• •,‘ - -.q, pvis! -,,,,- ,,.-4-wairsik,- =, lc,,,,,,•"1-T-:•••••, , • -•z-... -----rs ..:,,,*-- ••!,-,,,,,,,w, r r - 4....„„ "to,•7.4:,'. . 1.. ' ..>i„. „rem ,mmenit"•I Ai.:.1'7,1"miN, ,, , ,,, ,:i. ,!..., „pen, : ,,r,,,,,,,,,,„,: .‘,‘,,,:o:,:,..,‘„,,•• .;„4-. .., :t.,i, ..7. ,•„„ , ,....,,,,-47,,,.:,, „ ,_ , •••,..., \• , = ,, , . •,,, ,;‘,...riitt 4..-H 44 .4,=•.,.... ...),,-.:,, , - . ,11),::* %.*: this aerial view is prior to I - construction of the new improvements - ,'4,k, ‘ .. •.' ,,,, it, ‘,4,147„ • ‘ ,,,,,47-,, -, • 3*,., • . ' x.*„, ,•.. ,4-- ''-'' , , ..„,. , -1.-.***-- , , ,, :. ..t • -. •4,•,,41/11,,,,,It#4,„ •.;- •• 4.r.,-,, +':,'1---;!.-,*.-''•'•‘,..- •,,r• ,,k•A,-t,',*,•4•4,,t,0zV,r4::,,.1,•;•‘,-s,.„„,:,.., 4, ‘',_',4,•-• ,1,,-•N,,;,,,;i)',,‘ Ii,‘3,,,,,,„,,,,•„,-,,.,,,,,,:,k, .',7,‘,•,',:.•,,.A.,..,,•,-,.,,,,.,,,,,‘„-7..-.-,:,,,-„ ”,i!„•.„,,,,I,i2V.'':;..",,i,.t'.,'wr'.•As,.”,,.,--1,R,o,'.,",;4,-:. ' k 7'' ' , 1 , 7 - ,' ,, :'„%;;,;, --*:-.1‘...--. ,• • - rapproxinatelocation . -',•=.•i,t.!...0.4,16^v• 4' ::14i„...?" 1,-*‘,N-IO', of 1 of the 2 ,4:::.A;„ •'!,,,St"''';',,',i:•,,,,,‘,71:i ,,,,4, ,...* ...•Nv, -,.,,,,;„, .4,,-,„ ;•,:?,1"4-' '4",'',..VT,,•:•- 44;10.1i'' ''' .. *#' * • •••• ‘A 4-% new Rainrtarderis 4,..a• ,; Nt, • ‘''. ..'7„ :. „,,, ', ' ''' - .,,-,,,:,.,;..p..'' 'A'. :410,-,e:42- -.,, •v•,,, •-,-,,---,-roz------7-,,41....*.. „ '',' ss'';,4 ;*7.‘.* . , ‘, approximate location of I of the 2 ip.; '',,e' 4, , , ,...,:- , , : •,• ' r -%,,„:•3 \*, ,,,, new Ra . ,„4 • , •, • • , . , i\„„-4: •••,* , in Gardens , 1 , •:::,"4,,,,,:.1:1,;:•,1'•''' Ile• ,, , „ „ ,•":: t 1' ',,,,,,t',,. 4,,,•', .,t,N•si.,'•. , i;"• ‘tl ' ''X Z:0 - '4. + ""4-,,,'....7, :;:t ,‘,1•••' •'' '!'' 44'n',! --4141V '' 4'," It‘,'';\ '‘V.:4,3:;,‘•.*4 C., '•'$tlt *: ky i ' '.‘c,;‘,;-•m:' .4' ' * :***/`' ''''" '-''' -II''' :' '':' ,,,,,,,,,-,, ,,;,,,,,,,,\.,14,,, ,,,.,, „r„4,, .- , -t., ' ',-- ' -.i. ', .„$,,,,v,,:: '„0 4,1t,* -,:-,•••••;,; '1,„‘,,' ''t"',- ''''',...„0,,,• ':* ••-4-1 14; - " , *..' , -2* . _ 1 k , •.. :-,,v',.,.,,, ‘,• ,,,,, , :,v• - - '- i • \; 8040 SW Durham Rd „ , A ,-e-7,• ,. .. • '+' •' 'i\''''4'Nt •, ,i,sA"'"k"'', ,,,A.44,' '', '-,• ,:2,‘")‘‘ ,j4,:- -' , ,• . i''' ,,Ntkiii. ,': .4, - , -:,,,`f . • t,,,,-s, -, ‘ • , , 40,,,,,,pr:,-* • 4 •, • . s,..„ • • • ,, , •- 0 ' ''''**''''' *' '* '1'.,:rT' ri.$ ', ;4''3‘*N'• ''1„ \ 11kt ' ,,\ '2 , ' v: i,,, 4 :'', :t•Z,,p. i,, ,,,,,...;,,,:: i'.'0*4 $'',1.‘''' ', " ,,i 4,0'‘ ,t7,t' • : % I ..-ze,-4-0*%%444.:!: - •,,, Aik— !=-- -- . .0. '‘,.*%- ,,, ' .7.' • '.,e'" - '-,' ifr ' - tem• i ,.,*.vr ",,,,' -',44:‘: ,...*:,yy-s N;.• -1,4,0,, i „ ,„ ,.„. , o%,.., ,4,,,,,,,,,4.,,,NA, -• , -1 ,, '' 14,,,‘, •=-,•:y ' 4,,,,, 2, • . ' -,,s • • ''' ' ''''':.' ' *• I fl4e 4:lkit l'IW AL: . . .. . - *4 .'• * . " ' ' ':,', • ,''' '','' ' 1'` ,,‘,,,t,t'4 ":'• ' ,- , ,*'+r '':77,•' r',. -0.-• :t?; •kk."‘`,N:*' A. , , • location of 1 of the 2 existing i. ,e - 1 . ,-11-„:?•%-,N=4,,l,„,---•-•----ti = , ,., I ,,,,,,,,,•i.:„‘.., -:•,-4-.-.• -‘ . -% • . vege • :d swales z.,.! ;:t...<0,,,,•,,, ,,•„,,,,, „ ,,,,_„,,„„ , , -:- 4-'+41;*...- 1 " '. •.;,1 .-t,4,-- ;, .4:*,: :‘i:',::‘. ,,,,,,t•s,',7":,,,•;7-„",, .. •-„,..,,,,,' ,:‘ ' ,--•---„• ,' -,.`,•<, 4,,,,, :::. Tax II) * 2S1138A00401 7 •,,. ..,i* ;: - ...... • „..,,,,- r g v %.V•''. .'*4?..'''' S'''' ‘j,, 'A''.• VT':.'..' 'ItS"lk'i'' ' ' •it' ' ',•.' ••'••''• ' ,‘ ,c, Tax Acct * R1497428 k, • ik'‘,lt.„>• • , :t ; '7'Z.,,,..', '''', 1*** Tax ID. * 2S ii3orrorsor ,:.:: ) 1 A4''''' - ' . T`.:‘'"'"' ';'1,,W*4.-‘ ..,'•'‘,'. '. '',' 1,41,.1V411*,-- '144•41:if 1:11:11":17 1" '''' , 4‘4;,?,' 414:e• 14:141*•.'41';'' Tax Acct *Rg43,07 is\o, A,,,,-.f:2".A.**-,,'"7.r•!:, ,,-„A_,;;;,',,,,,A,,' 4;„ :A„:1" , , ''''*„,, „ *!„.,, , • ,, •', ,„,' •',• - ' '''*, 9':, "11F Tr,1,W.,' :,.'f„1:21, , .„ ' -' , , .-, .-- • y .- . • =I - • = : , t--tt *----,,,,,..... ,4L ' '••. .:fle ; -, ,...: .•,-46,,,,•„:„=,,„ , • . ' • ; A , ,, , , •• 7%.. .pri1/4 t,e ....4, -, zi' ,-,t%,:s • :,' , ,,o,„,_ ,.,_,...,,,,,,,„,, .o, ,- v.‘.,..',.1..r•• ', oit , - 8 ,t AN+.1614..st N:IL'.17*.1 C.,.:--q -4'.'''''''''"'• , 7 '>' ‘.tk i,•:,:.• -4 •,,,,,,,4.,4„,„--,,,,,git..-,%4 ,,:,A;2ic.,,,=%A ,' .*,4. ,,;', '‘''• •„?..j4,' : ;' *:.q1A:',Iit ."' '','• ''' ....% ,: , ,,, J ,', lt, ,,,,,,'t,, . , • , # ,,„ , , 'Alik1,-,,, .,.\. ',.• .,, `'''''''''4''''71''''''''' ' *.*" 7''' ,„':,,,;1*,.., ,,i,1,,t,‘,,„1" , '„,4,,:;„ ‘,,:;$:•;,:',<•!,„ **,*** ,,-,* 4. '4,•••' '"'***,*".1': ,1„4',„' ' , ‘• ,i,o:'..-. *4','% :, ,.;';‘>, •''' ' A ••• Tax ID * 2S113BA00401 '''''aiik "41'. AZIS‘'•r• - ,,,'*',7:;•1%, • .,`'„ ,„„• .4... f••• t „•; •-*:•;:;e7•. , 5...3.', • , .4 ',W. '' , .., ,,. Tax Acct. * R514081 . 2-., A- 1,--rad•:", ••t . er ,mill' '1' * ',''''4* ;z4V: <1.:,-:':: .*:;',V;ZVc.4 ,'::.'' ''54'.4::1:•4`','..:7!'g-i- V I"',"' approximate location of 1 of the 2 ;', "4; .-.1,- :-1-- ., .,.,, - „„-, • • - • •,,,,,,T. - ••. •': • lki.••••,..--, „,•,*-,..,* *,44i,..;:.,„,.0,, , :,•.:1-,,,, ‹ !r: ;, existing vegetated swains ;,•: ••.•: ' , ,.: .,"t:, i- lor.14,;,„i, ,,,,' • • ,,,,-„,,,. ..N.,-• ,'0,,. :"...• '4, --46,,,- - ,•.--;.,..- 4,.. ,,...*-.4,4,-;‘,...0,-- , -•y• g. ..,, -': :.•.4,44 1 N4A 4+rer.*.k•;•;„,',-*I*4•0, -„,,-.***N-e,.",,•At*I•w•,:,..c"Y"'-', '-'41#,:s,t,.,. -;-,-- ••,, '2' • ..• = ,„‘,.:,,,‘„, ,,‘ • ,,,‘, ,;‘4,,..,,.."7,...,.• :',.,, ,,, )...4,,,,, p=,, canister filter rnanhoIe :, ,•?, s, I •' '..,.2..02:,41VV,%,.,, ' u•-'4024i,,,, ,‘• .„ -, „ -, - 1 - •A4-4417 't,t,l,- „, j„ ., , ,, :, •! Xt,,if :1,--.‘,,,,',A",,,:v*,...,: ' ,, ,-2 V 444‘4'..',,A14,•„;: •;,,.:,-•-•',/./ .-1,•oe'vV,,t•- '''t. .‘0,1- ',4',1'.., •":„,"%.4.,012,4 . • 4,, ‘;',." ''•+•2,,‘",-‘41•*'''s'S;' I: ''','t, . *, .'''' „, '"; '';',,:•''''''441).•;t' •'• '',' ** ' '' 4. 44*•";_,.: i : ',: '‘,„ -."..:*'''17iz.;.'';,.'"'' '":.'Ali ,:;.+7i.::i74 'f, 1 rt4P.'f'S*' ''6:...,!At::'''r`.1 ok•*A' ••o:.z:::s'' •*-:' '''‘k 4it ' ''' ' '' '''''' ''''' -- :''4.''''''' ' ‘44°:*" 12t,...*:::,:,1',2,,',,,,, ,l'''.4.18,,''':, ,,,',', ,$•''' \'•:',‘‘,:,*„''''::;41,i.'1,''' "*Ir ...i':':e +‘*':it''', 7 ,',,T,i';,i„„',..,,* .„ *,, •- ,2, ' ,:',Ik•: ;2 ::',1A,•Itrt 't''Ok:'''' '•'''t•*!.,:-':,., 1: - , .,‘,,,,4,-,• -,,,.•:=.2= . .-',,-.‘ ,.- t ' : s, 4:,2'.•',,,!%,';,, *•.,:,',';' ,.-•;',4‘i; -,.r, Z:v,-", :Azt...k;-%`''.,,,s-1: :;•.-7',77-. „1 ' '„'',.,t'.,4c •:'5‘,...t.n'',,4k: '.%.:N‘s:' '4:,,' .:' ss.,''f,,„•: 14i.:,'`„%s.,,,44,.,2•1=4::0,.- : -‘,4'.'•,...-z-„. ‘%:;1 ..:4 , , .,= ,.,,,pi• ,,41/4- „:r , , ..4.% ss, ... ----,-fr ,,," ,..1,• •$6„ s- t„.4, • .„ 0.•,"•,‘‘',,,,r 1,v,',," .,.. : ' t , , .,„ ,, .: , F,, ,,,,,,:o. ,,.,.4,,,,„,,. ,,,p,‘,.„,, •• ..i.,, ,,,,,„. , 1 ,,,,,,,. x,,; ..444ii,. ,4,,,,,,,V,,,,:,'Mak*,f •'' ' .',',,.,' `"ti•'*-:**.-4?'''''',p,"41. ,,i' "'` ''' ' `'‘' ""•N•i s"• ' '- I* w ''„, '44% :,,,'•'' ,"'n:-, ' '' .• ,o•*;4,t.„..r4,!..;,a..,,,, ,-,. . ..,,o,,,,*1..,,50.‘‘,„ • , -,,4 •,,444 sli, .„.,,,,,,,,, ,,s„ , . „: ,..„,,,,„.04 = , „ .,... , 0 Ate ' *'''-''' , ' ..es‘4.••-, • , ••''., ,S,q*X' ;it. 4:,1i'','.:','',;;:k,'..,t • ,,-- i:.''N';z4,.-''''. .'. . -'.', * ' •‘'.•,t,'„4,V,4:,,;. •••'',1; '11,* ,‘ •‘' : 7.'"„. lee ''',*.,*' ,,i,,,qNs'''&iN''`,''''4'-••V 'i :' '''',,C**4 .'*"'''''*‘ '''*,e' *.•''71:•4•,. ,, •- • ,,, -'„ ,*, •* , ',,, '••,' „ ' ' ,,`,2"! ,?4,":",,'"* ••', 4, 4 ,',4'4 '4':44#E,,,i'Lmj$ \ itabweilmill \ ,, ''',''44:,, k,- „ • ,':•: 't •::.1 4.,:+':', •'',,- ' .Z,',:‘,„' W:k*, .,. e,•;t;',7'''''# 't •;tit''-',.•' ,':',:'""--"\‘' • .‘1," - .,, P_ M �+ f tg ra a'• s i � P t, :411111 '444 lir l. k" r, :- ter,;- ._ F—°°'+, + � •� . , r t«, �,,¢. r Exhibit A of the private water quality facilities ° r� o, 7." t� ,.,, ,.., ,�,,,� y• it, � r • lir S►; agreement between the City of Tigard and "r"-'--"'�,, ...LW-- ' - ti"` . . "` 1, Y , :'} -j $ f • 1 Tigard-Tualatin School District for '0 — ' {�+� D-11=R S I { + ! 1 ',,'`. - t'` CUP2017-00002 and PFI2017-00220 -- -ir =4...1,r"r'•••• 4,,-,�•:r/ "i" -- fi _ ,A. , Li L!1 R Ej At; this aerial view is prior to the construction of the new improvements j _ , .;°°;.,:-;!„:„......4„; ` / f•t` ,,,,, ,--` . z.. fib,•• ier, ♦ , ' , �,. 1�` ' „kik. r , ' 3•i.• salJ"-"" , ,, approximate location of 1 of the 2 %r�: •;":-.--",--;/17:-:'1;1-f-11;` � • new Rain Gardens — ' ,:I fapproximate location of 1 of the 2 c ,�° �' *c "' t�new Rain Gardens 1 I * lic 9 • '� ar- '. �ry T` it, - %- --.,.._ OF it f ,. �4 - - r • s .. : r „ �Ip ,f- O, 1 i a py r • ` ;` diail 9040 SW Durham Rd. J —7.---""' �1 t . `_ .� ` "�. • ,., :1 , 7 I - r y +alk - 16' /iC t*.'—""41,14":"""' location of 1 of the 2 existing - r' Y vegetated swales t a ..'1t S t' _.i •r •irocej ....„ Tax ID # 2S113BA00401 .,,,14,: i. '1 " Tax Acct # R14_91428 r - — iii. a * Tax ID. # 2S1138000300 It, a .p�• •,tavl tt. . c r ' ' Tax Acct # R514107 t•• , t ' 'iN. fa I. . Ji :;P ' ' ' Tax ID # 2S i 13BA00401 - f•,. , ,. f or x t r Tax Acct. # R514081 -F ,f',+• f•-• approximate location of 1 of the 2 t...:',...,....- .. ., , water quality manhole i \ N‹ :. I existing vegetated swales =s' , ' _ filter - i, � . kAa - .. ,� � i ' canister manhole �•"`. �„�,*� � �,'" , - ' * lit":/ t , , ^ '' "".•,. .......Pr,' 2 rwl, , . ,.. -----. ---,----...7:.__ ,.., ••,:L ,.. ' :,...." :'4. ' ,..,.. , ;,......, „. .F. x.. . ^ • �1• 4 i r • • 0 FeetI e5 tif411/H ♦ "3 , , ' q_ INAllilli 4 Infiltration Planter / Rain Garden Operation and Maintenance Plan Annual inspections are required. It is recommended that the facility is inspected on a monthly basis to ensure proper function.The plan below describes inspection and maintenance activities, and may be used as an inspection log.Contact the design engineer, Clean Water Services or City representative for more information. Identified Problem Condition to Check for Maintenance Activity Maintenance Timing ✓ Task Complete Comments Invasive Vegetation as Invasive vegetation found in facility. Remove excessive weeds and all outlined in Appendix A Examples include:Himalayan Blackberry; invasive plants.Attempt to control Reed Canary Grass;Teasel;English Ivy; even if complete eradication is not Nightshade;Clematis;Cattail;Thistle; feasible.Refer to Clean Water Services , Scotch Broom Integrated Pest Management Plan for SPRING SUMMER FALL appropriate control methods,including proper use of chemical treatment. roObstructed Inlet/Outlet Material such as vegetation,trash, Remove blockages from facility sediment is blocking more than 10% of the inlet pipe or basn opening 'WINTER SPRING o Inspect after major storm (1-inch in 24 hours) Excessive Vegetation Vegetation grows so tall it competes Cut tall grass 4"to 6"and remove with or shades approved emergent clippings.Prune emergent wetland wetland grass/shrubs;interferes with grass/shrubs that have become SPRING access or becomes a fire danger overgrown. Ideal time to prune emergent wetland grass is spring.Cut grass during dry months Tree/Shrub Growth Tree/shrub growth shades out Prune trees and shrubs that block sun wetland/emergent grass in treatment from reaching treatment area.Remove area.Interferes with access for trees that block access points. WINTER maintenance/inspection Do not remove trees that are not interfering with access or maintenance Ideal timing for pruning trees is rrc without first contacting Clean Water winter 7.444 Services or local City. rl 9 4 Infiltration Planter / Rain Garden Operation and Maintenance Plan (continued) Annual inspections are required. It is recommended that the facility is inspected on a monthly basis to ensure proper function.The plan below describes iv inspection and maintenance activities,and may be used as an inspection log.Contact the design engineer, Clean Water Services or City representative for more information. Identified Problem Condition to Check for Maintenance Activity Maintenance Timing V Task Complete Comments Hazard Trees Observe dead,dying or diseased trees Remove hazard trees. A certified As Needed arborist may need to determine health l of tree or removal requirements Poor Vegetation Coverage 80%survival of approved vegetation Determine cause of poor growth and and no bare areas large enough to correct the condition.Replant per the affect function of facility. approved planting plan and applicable SPRING FALL standards at the time of construction. Ideal time to plant is spring and Remove excessive weeds and all fall seasons invasive plants. Trash and Debris Visual evidence of trash,debris or Remove trash and debris from facility. dumping Dispose of properly SPRING SUMMER FALL WINTER ZS Lv Contaminants and Pollu- Evidence of oil gasoline,contaminants If contaminants or pollutants are rD tion or other pollutants.Look for sheens, present,coordinate removal/cleanup odor or signs of contamination. with local jurisdiction SPRING SUMMER FALL WINTER Erosion Erosion or channelization that impacts Repair eroded areas and stabilize using or effects the function of the facility or proper erosion control measures. creates a safety concern Establish appropriate vegetation as needed. FALL WINTER SPRING Flow Not Distributed Flows unevenly distributed through Level the spreader and clean so Evenly planter width due to uneven or that flows spread evenly over entire clogged flow spreader planter width WINTER SPRING V� Infiltration Planter / Rain Garden Operation and Maintenance Plan (continued) Annual inspections are required. It is recommended that the facility is inspected on a monthly basis to ensure proper function.The plan below describes inspection and maintenance activities,and may be used as an inspection log.Contact the design engineer, Clean Water Services or City representative for more information. Identified Problem Condition to Check for Maintenance Activity Maintenance Timing V Task Complete Comments Vector Control Evidence of rodents or water piping Repair facility if damaged.Remove As Needed through facility via rodent holes. harmful insects,use professional if Insects such as wasps and hornets needed.Refer to Clean Water Services interfere with maintenance/inspection Integrated Pest Management Plan for activities management options 1) aSediment Accumulation in Sediment depth in treatment area Remove sediment from treatment -0 Treatment Area exceeds 3 inches area.Ensure planter is level from rD side to side and drains freely toward SUMMER FALL outlet;no standing water within 24 hours after any major storm(1-inch Ideally in the dry season 0 in 24 hours) rD to Standing Water Standing water in the planter Remove sediment or trash blockages; 0-- between storms that does not drain improve end to end grade so there is freely.Water should drain after 24 no standing water 24 hours after any WINTER SPRING hours of dry weather major storm(1-inch in 24 hours) Inspect after major storm (1-inch in 24 hours) Grate Damaged,Missing Grate is missing or only partially in Grate must be in place and meets As Needed or Not in Place place may have missing or broken design standards.Replace or repair grate members any open structure 9 Or IRA Best Mil Management IS Products Th,Storm Water Quairty Expert[ Design and Maintenance Considerations for SNOUT Stormwater Quality Systems Background: The SNOUT system from Best Management Products, Inc. (BMP, Inc.) is based on a vented hood that can reduce floatable trash and debris, free oils, and other solids from stormwater discharges. In its most basic application, a SNOUT hood is installed over the outlet pipe of a catch basin or other stormwater quality structure with a deep sump (see Installation Drawing). The SNOUT forms a baffle that traps floatable debris and free oils on the surface, while permitting heavier solids to sink to the bottom of the sump. The clarified intermediate layer is forced out of the structure through the open bottom of the SNOUT by displacement from incoming flow. The resultant discharge contains considerably less unsightly trash and other gross pollutants, and can also offer reductions of free-oils and finer solids. As with any structural stormwater quality design, maintenance considerations will have a dramatic impact on SNOUT system performance over the life of the facility. The most important factor to consider when designing structures with a SNOUT is the depth of the sump. Sump is defined as the depth from the invert of the outlet pipe to the bottom of the structure. Simply put, the deeper the sump, the more effective the unit will be both in terms of pollutant removals and reducing frequency of maintenance. More volume in a structure means more quiescence, thus allowing the pollutants a better chance to separate out. Secondly, more volume means fewer cycles between maintenance, because the structure has a greater capacity. Of equal importance to good performance is putting SNOUTs in multiple structures. The closer one captures pollution to where it enters the infrastructure (e.g. at the inlet), the less mixing of runoff there is, and the easier it will be to separate out pollutants. Putting SNOUTs and deep sumps in all inlets that can be easily maintained develops a powerful structural treatment train with a great deal of effective storage volume, where even finer particles may have chance to settle out. Design Notes: • The SNOUT size is ALWAYS greater than the nominal pipe size. The SNOUT should cover the pipe OD and optimally the grouted area around the pipe (e.g. for a 12" pipe, an 18" SNOUT is the correct choice). • As a rule of thumb, BMP, Inc. recommends minimum sump depths based on outlet pipe inside diameters of 2.5 to 3 times the outlet pipe size. • For best performance, the inlet pipe and outlet pipe should have inverts close to the same elevation (a six inch or less deviation is optimal). • Special note for smaller pipes: A minimum sump depth of 36 inches for all pipe sizes 12 inches ID or less, and 48 inches for pipe 15-18 inches ID is required if collection of finer solids is desired. • The plan dimension of the structure should be up to 6 to 7 times the flow area of the outlet pipe. Increasing area beyond that has a minimal impact on performance. However, the structure wall where the SNOUT is mounted must accommodate the size of the SNOUT (either the correct diameter or enough width). • To optimize pollutant removals establish a "treatment train" with SNOUTs placed in as many inlets where it is feasible to do so (this protocol applies to most commercial, institutional or municipal applications and any application with direct discharge to surface waters). • At a minimum, SNOUTs should be used in every third structure for less critical applications (less critical areas might include flow over grassy surfaces, very low traffic areas in private, non-commercial or non-institutional settings, single family residential sites). • Use Bio-Skirts'for increased hydrocarbon reduction. Bio-Skirts are highly recommended for fueling or vehicle service stations, convenience stores, restaurants, loading docks, marinas, beaches, schools or high traffic applications. Each Bio-Skirt can retain about one gallon of oils. • Use the Stainless TrashScreen for"Full Trash Capture" requirements. • The "R" series SNOUTs (12R, 18R, 24R, 30R, 30R/96, 42RTB/60, 52RTB/72, 52RTB/84 and 72RTB/96) are available for round manhole type structures of up to 96" ID; the "F" series SNOUTs (LP318F, 12F, 18F, 24F, 30F, 36F, 48F, 72F and 96F) are available for flat walled structures; the "NP" series SNOUTs (NP1218R, NP1524R, NP1830R, and NP2430R) are available for smaller diameter structures up to 30" ID. Example Structure Sizing Calculation: A SNOUT equipped structure with a 15 inch ID outlet pipe (1.23 sqft. flow area)will offer best performance with a minimum plan area of 7.4 sqft. and 48 inch sump. Thus, a readily available 48 inch diameter manhole-type structure, or a rectangular structure of 2 feet x 4 feet will offer sufficient size when combined with a sump depth of 48 inches or greater. Maintenance Recommendations: • Monthly monitoring for the first year of a new installation after the site has been stabilized is a recommended practice. • Measurements should be taken after each rain event of .5 inches or more, or monthly, as determined by local weather conditions. • Checking sediment depth and noting the surface pollutants in the structure will be helpful in planning maintenance. • The pollutants collected in SNOUT equipped structures will consist of floatable debris and oils on the surface of the captured water, and grit and sediment on the bottom of the structure. • It is best to schedule maintenance based on the solids collected in the sump. • Optimally, the structure should be cleaned when the sump is half full (e.g. when 2 feet of material collects in a 4 foot sump, clean it out). • Structures should also be cleaned if a spill or other incident causes a larger than normal accumulation of pollutants in a structure. 04)..',r / • Maintenance is best done with a vacuum truck. • If Bio-Skirts are being used in the structure to enhance hydrocarbon capture, they should be checked on a monthly basis for the first year, and serviced or replaced when more than 2/3 of the boom is submerged, indicating a nearly saturated state. Assuming a typical pollutant-loading environment exists, Bio- Skirts should be serviced* annually or replaced as necessary. • In the case of an oil spill, the structure should be checked and serviced and Bio-Skirts (if present) replaced or serviced immediately. • All collected wastes must be handled and disposed of according to local environmental requirements. • To maintain the SNOUT hoods, an annual inspection of the anti-siphon vent and access hatch are recommended. A simple flushing of the vent, or a gentle rodding with a flexible wire are all that's typically needed to maintain the anti-siphon properties. Opening and closing the access hatch once a year ensures a lifetime of trouble-free service. *To extend the service life of a Bio-Skirt, the unit may be "wrung out" to remove oils and washed in an industrial washing machine with warm water. The Bio-Skirt may then be re-deployed if the material maintains it's structural integrity. A maintained Bio-Skirt can last for several years. Each Bio-Skirt can hold about on gallon of oils. SNOUT INSTALLATION: TYPI CAL INSTALL AT ION / AN I ISIP++DN DEVIEE SSW" r--- o6-0FARIS HOOD OLAND D_BRIS OUTLET Iti_E7 PIPE lik �� PIP`"` r SEE OTE" suJ Th SL 11 LE O's }Bo.rrov b�4i.l.•.: , w 9A• 'NOTE-SUMP DEPTH OF)4'MIN,FOR v"O'T'ED PIPE. OL1T1 V. FOR PIPES 15"ID AND ABOVE SOF'OFPT,- OF 7.5 TO 3 TIMES PIPE ID RFCOMMFNDFD W.f.,5 PEEP far 24'PIPE, Vegetated Swale Operation and Maintenance Plan Annual inspections are required. It is recommended that the facility is inspected on a monthly basis to ensure proper function.The plan below describes 1' inspection and maintenance activities, and may be used as an inspection log.Contact the design engineer, Clean Water Services or City representative for more information. Identified Problem Condition to Check for Maintenance Activity Maintenance Timing V Task Complete Comments Obstructed Inlet/Outlet Material such as vegetation,sediment Remove blockages from facility is blocking more than 10%of Inlet/ outlet pipe or basin opening WINTER SPRING Flow not distributed evenly Flows unevenly distributed through Level and clean the spreader so that swale due to uneven or clogged flow flows spread evenly over entire swale spreader width WINTER SPR,NG 3 Sediment Accumulation in Sediment depth in treatment area Remove sediment from treatment Treatment Area exceeds 3 inches area.Ensure facility is level from side to side and drains freely toward SLOWER FALL outlet;no standing water once inflow Ideally in the dry season has ceased liie/Shrub Growth Tree/shrub growth shades out Prune trees and shrubs that block sun wetland/emergent grass in treatment from reaching treatment area.Remove area.Interferes with access for trees that block access points. WINTER c maintenance/inspection Do not remove trees that are not Ideal timing for pruning is interfering with access or maintenance winter ) 8 without first contacting Clean Water Services or local City Hazard Trees Observed dead,dying or diseased Remove hazard trees.A certified As Needed trees arborist may be needed to determine health of tree or removal requirements Vegetated Swale Operation and Maintenance Plan (continued) Annual inspections are required. It is recommended that the facility is inspected on a monthly basis to ensure proper function.The plan below describes inspection and maintenance activities,and may be used as an inspection log. Contact the design engineer, Clean Water Services or City representative for more information. Identified Problem Condition to Check for Maintenance Activity Maintenance inning V Task Complete Comments Erosion Erosion or channelization that impacts Repair eroded areas and stabilized or effects the function of the facility or using proper erosion control measures. creates a safety concern Establish appropriate vegetation as FALL WINTER SPRING needed. ,) a, Poor Vegetation Coverage 80%survival of approved vegetation Determine cause of poor growth and and no bare areas large enough to correct the condition.Replant per the affect function of facility approved planting plan and applicable FALL SPRING standards at time of construction. Ideal time to plant is spring and 3 Remove excessive weeds and all fall seasons invasive plants. • Invasive Vegetation as Invasive vegetation is found in facility. Remove excessive weeds and all s outlined in Appendix A Examples include:Himalayan Blackberry; invasive plants.Attempt to control Reed Canary Grass;Teasel;English Ivy; even if complete eradication is not SPRING SUMMER FALL Nightshade;Clematis;Cattail;Thistle; feasible.Refer to Clean Water Services Scotch Broom Integrated Pest Management Plan for " appropriate control methods,including proper use of chemical treatment Excessive Vegetation Vegetation grows so tall it competes Cut tall grass to 4"to 6"and remove with or shades approved emergent clippings. Prune emergent wetland wetland grass/shrubs;interferes with grass/shrubs that have become SPRING access or becomes fire danger overgrown. Ideal time to prune emergent wetland grass is spring.Cut it grass in dry months S _ +' Trash and Debris Visual evidence of trash,debris or Trash and debris removed from facility. dumping Dispose of properly $' SPRING SUMMER FALL WINTER Vegetated Swale Operation and Maintenance Plan (continued) Annual inspections are required. It is recommended that the facility is inspected on a monthly basis to ensure proper function.The plan below describes '4#s' inspection and maintenance activities,and may be used as an inspection log. Contact the design engineer, Clean Water Services or City representative for more information. Identified Problem Condition to Check for Maintenance Activity Maintenance Timing V Task Complete Comments j I Standing Water Standing water in the swale between Remove sediment or trash blockages; storms that does not drain freely improve grade from end to end of swale;no standing water 24 hours WINTER SPRING after any major storm(1-inch in 24 Inspect after any major storm hours) (I-inch in 24 hours) O 5 Vector Control Evidence of rodents or water piping Repair facility if damaged.Remove As Needed through facility via rodent holes. harmful insects,use professional if Harmful insects such as wasps and needed. hornets interfere with maintenance! Refer to Clean Water Services inspection activities Integrated Pest Management Plan for management options a Contamination and Evidence of oil,gasoline,contaminants, If contaminants or pollutants present, Pollution or other pollutants.Look for sheens, coordinate removal!cleanup with = odor or signs of contamination local jurisdiction SPRING SUMMER FALL WINTER a Cr 57:-CD Grate Damaged,missing or Grate is missing or only partially in Grate must be in place and meet As Needed not in place place,may have missing or broken design standards.Replace or repair grate members any open structure,replace grate if missing. Damage b Outlet Structure Frame not sitting flush on top slab Ensure frame is firmly attached and As Needed (more than 3/+inch between frame and sits flush on riser rings or on top of top slab);frame not securely attached slab.Structure replaced or repaired to design standards Vegetated Swale Operation and Maintenance Plan (continued) Annual inspections are required. It is recommended that the facility is inspected on a monthly basis to ensure proper function.The plan below describes inspection and maintenance activities, and may be used as an inspection log. Contact the design engineer, Clean Water Services or City representative for more information. Identified Problem Condition to Check for Maintenance Activity Maintenance Timing ✓Task Complete Comments Damage to Outlet Structure Fractures or Cracks in,Nails or Bottom. Structure replaced or repaired to As Needed Maintenance person cetermines the design standards structure is unsound.Soil entering ) structure through cracks v Damage to Outlet Structure Settlement or Misalignment.Failure of Structure replaced or repaired to As Needed fp basin has created a safety,function, design standards or design problem eD 0 a e n 7 C : NTECH® ENGINEERED SOLUTIONS StormFilter Inspection and Maintenance Procedures 5. S , i f jy z • • The Stormwater Management StormFilter Maintenance Guidelines In addition to these two activities, it is important to check The primary purpose of the Stormwater Management the condition of the StormFilter unit after major storms for StormFilter®is to filter and prevent pollutants from entering our potential damage caused by high flows and for high sediment waterways. Like any effective filtration system, periodically these accumulation that may be caused by localized erosion in the pollutants must be removed to restore the StormFilter to its full drainage area. It may be necessary to adjust the inspection/ efficiency and effectiveness. maintenance schedule depending on the actual operating conditions encountered by the system. In general,inspection Maintenance requirements and frequency are dependent on the activities can be conducted at any time,and maintenance should pollutant load characteristics of each site. Maintenance activities occur, if warranted,during dryer months in late summer to early may be required in the event of a chemical spill or due to fall. excessive sediment loading from site erosion or extreme storms. It is a good practice to inspect the system after major storm events. Maintenance Frequency The primary factor for determining frequency of maintenance for Maintenance Procedures the StormFilter is sediment loading. Although there are many effective maintenance options,we A properly functioning system will remove solids from water by believe the following procedure to be efficient, using common trapping particulates in the porous structure of the filter media equipment and existing maintenance protocols.The following inside the cartridges.The flow through the system will naturally two-step procedure is recommended:: decrease as more and more particulates are trapped. Eventually 1. Inspection the flow through the cartridges will be low enough to require • Inspection of the vault interior to determine the need for replacement. It may be possible to extend the usable span of the maintenance. cartridges by removing sediment from upstream trapping devices 2. Maintenance on a routine as-needed basis, in order to prevent material from being re-suspended and discharged to the StormFilter treatment • Cartridge replacement system. • Sediment removal The average maintenance lifecycle is approximately 1-5 years. Inspection and Maintenance Timing Site conditions greatly influence maintenance requirements. At least one scheduled inspection should take place per year with StormFilter units located in areas with erosion or active maintenance following as warranted. construction may need to be inspected and maintained more often than those with fully stabilized surface conditions. First,an inspection should be done before the winter season. During the inspection the need for maintenance should be Regulatory requirements or a chemical spill can shift maintenance determined and, if disposal during maintenance will be required, timing as well.The maintenance frequency may be adjusted as samples of the accumulated sediments and media should be additional monitoring information becomes available during the obtained. inspection program.Areas that develop known problems should be inspected more frequently than areas that demonstrate no Second, if warranted,a maintenance(replacement of the filter problems,particularly after major storms. Ultimately,inspection cartridges and removal of accumulated sediments)should be and maintenance activities should be scheduled based on the performed during periods of dry weather. historic records and characteristics of an individual StormFilter system or site. It is recommended that the site owner develop a database to properly manage StormFilter inspection and maintenance programs.. egfrr ; .tea ^' 2 Maintenance Decision Tree ! .� a$° a .: The need for maintenance is typically based on results of the ! ,f'`; - t': >' , inspection. The following Maintenance Decision Tree should be used as 4 a general guide.(Other factors,such as Regulatory Requirements,may uv need to be considered) k- - " 1. Sediment loading on the vault floor. a. If>4"of accumulated sediment, maintenance is .,0 -: required. , 2. Sediment loading on top of the cartridge. a. If>1/4"of accumulation, maintenance is required. " - ___ _ , 3. Submerged cartridges. %,' a. If>4"of static water above cartridge bottom for more than 24 hours after end of rain event, maintenance ys 4 i‘'.;,,-,,, 9 is required. (Catch basins have standing water in the cartridge bay.) Inspection Procedures 4. Plugged media. The primary goal of an inspection is to assess the condition of a. If pore space between media granules is absent, the cartridges relative to the level of visual sediment loading as maintenance is required. it relates to decreased treatment capacity. It may be desirable to conduct this inspection during a storm to observe the relative 5. Bypass condition. flow through the filter cartridges. If the submerged cartridges a. If inspection is conducted during an average rain fall are severely plugged,then typically large amounts of sediments event and StormFilter remains in bypass condition will be present and very little flow will be discharged from the (water over the internal outlet baffle wall or submerged drainage pipes. If this is the case,then maintenance is warranted cartridges), maintenance is required. and the cartridges need to be replaced. 6. Hazardous material release. Warning: In the case of a spill, the worker should abort a. If hazardous material release(automotive fluids or other) inspection activities until the proper guidance is obtained'. is reported, maintenance is required. Notify the local hazard control agency and Contech Engineered Solutions immediately. 7. Pronounced scum line. a. If pronounced scum line(say >_ 1/4"thick) is present To conduct an inspection: above top cap, maintenance is required. Important: Inspection should be performed by a person who is familiar with the operation and configuration of the StormEilter treatment unit. 1. If applicable, set up safety equipment to protect and notify surrounding vehicle and pedestrian traffic. 2. Visually inspect the external condition of the unit and take notes concerning defects/problems. t 3. Open the access portals to the vault and allow the system vent. 4. Without entering the vault,visually inspect the inside of the unit,and note accumulations of liquids and solids. 5. Be sure to record the level of sediment build-up on the floor of the vault, in the forebay, and on top of the cartridges. If flow is occurring, note the flow of water per drainage pipe. Record all observations. Digital pictures are valuable for historical documentation. 6. Close and fasten the access portals. 7. Remove safety equipment. 8. If appropriate, make notes about the local drainage area relative to ongoing construction,erosion problems,or high loading of other materials to the system. 9. Discuss conditions that suggest maintenance and make decision as to weather or not maintenance is needed. 3 Maintenance f' Depending on the configuration of the particular system, �`_ f� maintenance personnel will be required to enter the vault to _ , ' d T. perform the maintenance. Important: If vault entry is required, OSHA rules for confined space et must be followed. � {y z � Filter cartridge replacement should occur during dry weather. y, It may be necessary to plug the filter inlet pipe if base flows is ' `` occurring. Replacement cartridges can be delivered to the site or customers facility. Information concerning how to obtain the replacement I :1 cartridges is available from Contech Engineered Solutions. ,�°.; 77 0 Warning: In the case of a spill, the maintenance personnel - `*".� j ' S q should'abort maintenance activities until the proper guidance , ',. is obtained. Notify the local hazard control agency and ry 44-WI i--..;.-;';,,, - Contech Engineered Solutions immediately. �� �"� �"` fir" "� hk To conduct cartridge replacement and sediment removal € maintenance: . - `n ,, ' , 1. If applicable,set up safety equipment to protect maintenance ,WO h .„A, ,r 4.611 * ,,,,, personnel and pedestrians from site hazards. , 2. Visually inspect the external condition of the unit and take notes concerning defects/problems. _~`"" °, 3. Open the doors(access portals)to the vault and allow the v. system to vent. 4. Without entering the vault,give the inside of the unit, Important: Care must be used to avoid damaging the including components, a general condition inspection. cartridges during removal and installation.The cost of 5. Make notes about the external and internal condition of repairing components damaged during maintenance will be the vault.Give particular attention to recording the level of the responsibility of the owner. sediment build-up on the floor of the vault, in the forebay, C. Set the used cartridge aside or load onto the hauling and on top of the internal components. truck. 6. Using appropriate equipment offload the replacement cartridges(up to 150 lbs.each)and set aside. D. Continue steps a through c until all cartridges have been 7. Remove used cartridges from the vault using one of the removed. following methods: Method 2: Method 1: A. This activity will require that maintenance personnel enter A. This activity will require that maintenance personnel enter the vault to remove the cartridges from the under drain the vault to remove the cartridges from the under drain manifold and place them under the vault opening for manifold and place them under the vault opening for lifting(removal). Disconnect each filter cartridge from the lifting (removal). Disconnect each filter cartridge from the underdrain connector by rotating counterclockwise 1/4 of underdrain connector by rotating counterclockwise 1/4 of a turn. Roll the loose cartridge,on edge,to a convenient a turn. Roll the loose cartridge,on edge,to a convenient spot beneath the vault access. spot beneath the vault access. B. Unscrew the cartridge cap. Using appropriate hoisting equipment,attach a cable C. Remove the cartridge hood and float. from the boom,crane,or tripod to the loose cartridge. Contact Contech Engineered Solutions for suggested D. At location under structure access,tip the cartridge on its attachment devices. side. B. Remove the used cartridges(up to 250 lbs.each)from the E. Empty the cartridge onto the vault floor. Reassemble the vault. empty cartridge. F. Set the empty, used cartridge aside or load onto the hauling truck. G. Continue steps a through e until all cartridges have been removed. 4 8. Remove accumulated sediment from the floor of the Material Disposal vault and from the forebay.This can most effectively be The accumulated sediment found in stormwater treatment accomplished by use of a vacuum truck. and conveyance systems must be handled and disposed of in 9. Once the sediments are removed, assess the condition of the accordance with regulatory protocols. Int is possible for sediments vault and the condition of the connectors. to contain measurable concentrations of heavy metals and 10.Using the vacuum truck boom, crane,or tripod, lower and organic chemicals(such as pesticides andi petroleum products). install the new cartridges.Once again,take care not to Areas with the greatest potential for high pollutant loading damage connections. include industrial areas and heavily traveled roads. 11.Close and fasten the door. Sediments and water must be disposed of in accordance with 12.Remove safety equipment. all applicable waste disposal regulations.When scheduling 13.Finally,dispose of the accumulated materials in accordance maintenance,consideration must be made for the disposal of with applicable regulations. Make arrangements to return the solid and liquid wastes.This typically requires coordination with used empty cartridges to Contech Engineered Solutions. am local landfill for solid waste disposal. For liquid waste disposal a number of options are available including a municipal vacuum truck decant facility, local waste water treatment plant or on-site treatment and discharge. Related Maintenance Activities - Performed on an as-needed basis ' , , ' '' StormFilter units are often just one of many structures in a more comprehensive stormwater drainage and treatment system. In order for maintenance of the StormFilter to be successful, it is imperative that all other components be properly maintained. The maintenance/repair of upstream facilities should be carried Ti: out prior to StormFilter maintenance activities. ot In addition to considering upstream facilities, it is also important to correct any problems identified in the drainage area. Drainage area concerns may include:erosion problems, heavy oil loading, .,::.5,..:;.14:;, and discharges of inappropriate materials. st, 4:1:1:11,1;11816611, g �#3f 4g#, s, zee y 9° ', ..., , :;,,,77,-',--1-4-,,,,,--:— ,. ,. a may' 3 5 • 4, Inspection Report Date: Personnel: Location: System Size: System Type: Vault ❑ Cast-In-Place ❑ Linear Catch Basin ❑ Manhole U Other U Date: Sediment Thickness in Forebay: Sediment Depth on Vault Floor: Structural Damage: Estimated Flow from Drainage Pipes(if available): Cartridges Submerged: Yes ❑ No Cl Depth of Standing Water: StormFilter Maintenance Activities(check off if done and give description) ❑ Trash and Debris Removal: ❑ Minor Structural Repairs: ❑ Drainage Area Report Excessive Oil Loading: Yes ❑ No ❑ Source: Sediment Accumulation on Pavement: Yes ❑ No ❑ Source: Erosion of Landscaped Areas: Yes ❑ No ] Source: Items Needing Further Work: Owners should contact the local public works department and inquire about how the department disposes of their street waste residuals. Other Comments: Review the condition reports from the previous inspection visits. StormFilter Maintenance Report Date: Personnel: Location: System Size: System Type: Vault Cast-In-Place — Linear Catch Basin Manhole Other List Safety Procedures and Equipment Used: System Observations Months in Service: Oil in Forebay(if present): Yes No Sediment Depth in Forebay(if present): Sediment Depth on Vault Floor: Structural Damage: Drainage Area Report Excessive Oil Loading: Yes No Source: Sediment Accumulation on Pavement: Yes U No Source: Erosion of Landscaped Areas: Yes No Source: StormFilter Cartridge Replacement Maintenance Activities Remove Trash and Debris: Yes No — Details: Replace Cartridges: Yes n No Details: Sediment Removed: Yes n No — Details: Quantity of Sediment Removed (estimate?): Minor Structural Repairs: Yes i I No I Details: Residuals (debris, sediment) Disposal Methods: Notes: ��1.RECYCLED PAPER CONTECH' ENGINEERED SOLUTIONS ©2016 CONTECH ENGINEERED SOLUTIONS LLC. 800-338-1122 www.Contech ES.com All Rights Reserved. Printed in the USA. Contech Engineered Solutions LLC provides site solutions for the civil engineering industry.Contech's portfolio includes bridges, drainage,sanitary sewer, stormwater and earth stabilization products. For information on other Contech division offerings,visit contech-cpi.com or call 800.338.1122. Support • Drawings and specifications are available at www.conteches.com. • Site-specific design support is available from our engineers. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS AN EXPRESSED WARRANT Y OR AN IMPLIED WARRANTV OF MERCHANTABILITY OR FITNESS FOR AN Y PARTICULAR PURPOSE.SEE THE CONTECH STANDARD CONDITIONS OF SALE(VIEWABLE AT WWW.CONTECHES.COM/COS)FOR MORE INFORMATION. 800.338.1122 www.conteches.com StormFilter Inspection and Maintenance Procedures 8/2016