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Home My WebLink About03550 - Technical Information Report 0 h �' TECHNICAL INFORMATION REPORT � Proposed Renton Gateway Center 750 West Perimeter Road Renton Airport, Renton, Washington 98055 Prepared for: Pro Flight Aviation Inc. 243 West Perimeter Road Renton, Washington 98055 ,, �,�PpHlLlpp�O Gp^�oF��:�.ti��'t�`s ;; ,J i. �.- June 29, 2009 3I1� lo '� � Revised: October 23, 2009 �38375 � :�. �. -�.,,Tt.af. _�,- Revised: January 14, 2010 SS'��.a�-�"`� Revised: March 3, 2010 Our Job No. 12564 � '' 31� 1 �o � ��H A(�y' 4 � CIVIL ENGINEERING, LAND PLANNING, SURVEYING m � Z 18215 72ND AVENUE SOUTH KENT,WA 98032 (425}251-6222 (425)251-8782 F,4x o � 2 BRANCH OFFICES ♦ OLYMPIA,WA ♦ TACOMA,WA ♦ CONCORD,CA ♦ TEMECULA,CA �G �' www.barghausen.com �r��N��N�� 3 sso TABLE OF CONTENTS 1.0 PROJECT OVERVIEW Figure 1 —Technical Information Report (TIR)Worksheet Figure 2—Site Location 2.0 PRELIMINARY CONDITIONS SUMMARY 2.1 Analysis of the Five Core Requirements 2.2 Analysis of the Special Requirements 3.0 OFF-SITE ANALYSIS APPENDIX EXHIBIT A - BASIN MAP EXHIBIT B - BASIN SUMMARY EXHIBIT C - OPERATION AND MAINTENANCE MANUAL FOR CONCRETE VAULT TYPE OILNVATER SEPARATOR USING FACET INTERNATIONAL COALESCING PLATE PACKS EX.H!B!T D - OIL^,^�`�ATER SEPARAT(��R DETAIL_� ; 12564.00S.doc � W � � W � � � V W � � � � � r 1.0 PROJECT OVERVIEW This site is located within a portion of the Southwest quarter of Section 7, Township 23 North, Range 5 East, Willamette Meridian, City of Renton, King County, Washington, and comprises approximately 1.47 acres. More particularly, the site is located at 750 West Perimeter Road, Renton Airport, Renton, Washington. The attached Vicinity Map gives the exact location of the project site. The proposal for this development is to construct eight aircraft hangars, six of which will be used for aircraft storage, and two of which will be used for maintenance of aircraft, along with an additional building for the purpose of providing pilot concierge service. In addition, existing asphalt on the site will be modified and replaced with new asphalt to allow for the parking of approximately 24 automobiles along the west side of the proposed hangar structures. The existing site is almost entirely impervious surface consisting of buildings and pavement with the remaining area of gravel or dirt. Under proposed conditions, much of this gravel/dirt area will be converted into landscaping, which should actually decrease the amount of runoff coming off the project site; however, the total impervious surFace on the project site will increase by a slight amount of approximately 900 square feet. Detention is not proposed nor required for this project site. There is an existing 7-foot by 5-foot reinforced concrete box culvert located underneath Perimeter Road immediately west of the project site that this site will drain to. There are existing catch basins on the project site that discharge into this reinforced concrete box culvert that will be utilized with this new development. Since this project site is located on a portion of an airport, the project site is relatively flat in nature. It is anticipated there will be minimal grading to occur, with site grades staying much the way they are. Please refer to the existing and proposed Site Land Coverage table on the following pages of this report for a complete description of the site land covers. As requested by the airport, water quality to trap oils will be provided for this development two oil/water separators. The one on the west was sized to handle the 0.47 acre of paved parking lot. A second CDS Unit was sized to handle 2.24 acres of airport ramp to the east. Please refer to the Basin Map, Basin Summary, Operations and Maintenance Manual for Concrete Vault Type OiINVater Separator Using Facet International Coalescing Plate Packs, and the Oil/Water Separator Details on the following pages of this report. 12564.008.doc EXISTING AND PROPOSED SITE LAND COVERS Existinq Condition: Building = 1,165 SF Pavement = 45,162 SF Gravel/Dirt = 17.682 SF TOTAL = 64,009 SF Proposed Condition: Building = 30,150 SF Pavement = 16,897 SF Concrete = 198 SF Landscaping = 13,759 SF Gravel/Dirt = 3.005 SF TOTAL = 64,009 SF 12564.008.doc FIGURE 1 TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Page 1 ot 2 King County Building and Land Development Divfsion TECHNICAL INFORMATION REPORT {TIR) W�RKSHEET - . . . - . . . . , � � . Project Ottimer Pro Flight Aviation�Inr._ Project Name Renton Gateway Center A�f65S Z4�Wect Perimeter Rnacl_ Rentnn�,4 9Rl155 Location Phone ��?8-9510 _ Township 23 North Projed Engineer octa Phil'�dPc Range 5 East Sedion 7 Company Barghausen Consulting�.ng'ni eerc,jnc_ prOject Size 1.47 Acrec AC Address Phone 18215-72nd Avenue South.Kent,�6 Upsiream Orainage Basin Size AC 98032•Phone: 425 2 - . , . � , . , � � 0 Subdivision � DOFIG HPA � Sho�elaie Management [� Short Subdivision Q CpE 404 � Rodcery � Grading � DOE Dam Safety ' L] Struclural Vaults � Commeraal � FEMA Floodpiain �X Other NPDES Q Othor O COE Wollands O HPA . � � - Communiry Rent�n Drainage Basin r �ke Washing�n , 0 River � Floodplain [] Stream 0 Wedands � Gitical Stream Reach � Seeps/Springs (� Depressions/Swales Q High Groundwater Table C7 Lake � Groundwater Recharge 0 Steep Slopes � Olher � t.akeside/Erosion Hazard . . Soii Type Slopes Erosion Potentiaf Erosive VelociGes Urban Land [] Additiona(Sheets Attatched 1/90 12564.004.pdf P�.za2 Klnp County Bulldirtfl and I.and Oavebpment Dlvlslon TECHNICAL INFORMATION REPORT (TIR) WORKSHEET • . • � •• . � REFERENCE LIMITATIOWSITE CONSTRA{NT � Ch.4-Dorv�tream Analvsis _ � - � n __ _ c� a [] �W�onal sr►ee�s Ana�cned . . MINIMUM ESC REDUIREMENTS MINIMUM ESC REQUtREMENTS DURING CANSTRUCTION FOILOWING CONSTRUCTION �] Sed�mentatim Faalilies � Stabaize E�osed Swtaoe � StabiHzed ConsUuction Enlrance (�l Aemo�re and Reslore Temporary ESC Fadlities (.�(] Perimeler Runofl Control � Clean and Remov�a All SYt av�d Oebris O Clearing and Cxadhg Reslridions � Enwre Operation ol Permanerq Fadl�es � Cova Pradioes � Flag Limits ot NGPES � Co�ructan sequenoe O o�hsr � Otlter . . � . . . , O Grass Lined cnan�e� O rar�c O Irdiaraaon Mea,od a Andysk � P�ps System � Vaull � Depr�ssion O �pan Chame� O Ener9Y Dissapator O �►�� c.aripw�salloNM tio� � oy�«�d O w.a� O w� or�ad s�s�`or� O w•l�or�d � s�, O r�ro�� Briel Descxiption of System Ope►ali�on Catch baain collection W aiuc convcvancc to discharae off site. , Faciy R�IaMd Sile limitatio� Q Additlonwt 8ha�ls MaicF�d Rd�r� Facilly UmNMbn . . . . . I Q �Pdf1�E80ifINflt 0 Cast in Plaa Vault � Other � Aocoss Eas�rtwnt O RetaWrg Wap Q Na1iMs Grwrrlh Probciion Ea�emeM � Rodc�ry>4'F�icjh � Trad 0 StrucMusl on Sleep Slope C] Olher . . . � . .� � . ' t w�dvil�ngin�undK my supervision have vbiled q»Nta Actual si1�oa�dWons�s oDs�rv�d wK�incwporM�d inlo tl�is wo�ic�h�N and tha �,.��, �tchm�nts. To fhe b�st of my knowM�d�e fhs infwmalbn providsd � her�f�accurNe. 12bd4.004.paf _ __ ._�/90 Z O N � wa � c� � o (' J LL. W H � . . i ari s t ,. a • � � `� ' • !r n� •�^ , . . 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' '�- � T -`'.`....>Jy ; 1 �t�� f....- 4 ;� � ., .� •�'- f � F D ., �- �- :. , �. �`� 3, � • �`"`'�.�,_....,_. _ + "J " I $."f ' ' ,.,, ` � �, ra�ia. • S ts_`_` _ .�r � Z { � �`'� l»t ne,�. � • r S�, ti � ��.{—��., � k � �'�+p iL-. . s �i . � 1 . �,� ,� .. - � I 4 �� ♦ 1 t K�c sl�l � � � y� �f ,"�'1-u�r�w .arrr k y t � ,. � t! + i � y Y� t � .� .. r Ir � �'�? i � 'S � � . � � f/ttrll � � i . �< �� v,.� �7e �w '": � ' . � �� s� < < � a' e.��^t� � _ ' . ` R . � � � y►� � r � , O - . �•r }.,�; � � P ' � � �-� u 1'asr � � n NtT7iD� ■ t�w nu� � R w •� + + w+�r ti ': a-� J\ �} .\ 4 . '' u � `� , .ya r � q ' , , �,r c � � • . • ,�� M� � a i �n � gf •e r R f F L� P , 9 ! � � A1 .s_ � • U�1!�` � R ti .�� REFERENCE:Tl►omes Guide(2006) �•= For.' .lob Number llbdiontaC N.T.S. Mb►dcd. IWA RENTON GATEWAY CENTER 12564 GHAV 1821572NDAVENUES�UTH RENTON, WASHINGTON � tT�j�s� KENT,WA 96032 m � 2 (425j 251-6222 Tj't/@: t+_ `, y�= (425)251,8782 VICINITY MAP ��r�h ;� �F� CIVL EI�lOItrEERMJO.LAND PL.ANNMlG. a�Ma�M� SURVEYING.ENVIRONI�AENTAL 3ERVICES �,E;G/3OIOJ P:112000sN25841exMb�1f258d vmap.cdr 2.0 PRELIMINARY CONDITIONS SUMMARY 2.0 PRELIMINARY CONDITIONS SUMMARY 2.1 Analysis of the Five Core Requirements Core Requirement No. 1: Discharge at the Natural Location. Response: This site will discharge into the 7-foot by 5-foot reinforced concrete box culvert undemeath Perimeter Road, which courses in a northerly direction on the west side of the project site just as it does under existing conditions. Therefore, this Core Requirement is met. Core Requirement No. 2: Oi9`-Site Analysis. � Response: No off-site analysis is required for this project site as it is an already developed site and the City is well aware of the downstream drainage course from this project site. In addition, the site has almost direct discharge into Lake Washington at the northern end of the airport. Core Requirement No. 3: Runoff Control. Response: Since only 900 square feet of impervious surface is being added with this project, runoff control in the form of detention is not a requirement for this project site. The entire existing site could be considered impervious surface. Core Requirement No. 4: Conveyance System. Response: The conveyance system for this project site will be sized in accordance with the 1990 King County Surface Water Design Manual such that the Modified Rational Method will be utilized to size the conveyance elements for this project site with a 3.4-inch 25-year precipitation rate, a Manning's 'n' value of 0.014, and an initial time of concentration of 6.3 minutes. This is a very conservative sizing methodology and provides safe conveyance elements. Core Requirement No. 5: Temporary Erosion and Sedimenfafion Control. Response: A temporary erosion and sedimentation control plan will be prepared with this project such that clearing limits will be specified, cover measures will be utilized should there be stockpiling of dirt anywhere on the project site, perimeter protection will be installed in the form of silt fences along the downstream perimeter of the project site to prevent sediment-laden runoff from leaving the project site, traffic area stabilization will be provided in the form of a rock construction entrance with the adjacent streets being swept on a daily basis should be sediment be tracked off site, and dust control will be utilized should this project be constructed during the drier summer months. 2.2 Analysis of the Special Requirements Special Requirement No. 1: Critical Drainage Areas. Response: This site is not located within a critical drainage area; therefore, the requirements of Special Requirement No. 1 do not apply. Specia/Requiremenf No. 2: Compliance with an Existing Master Drainage Plan. Response: This project site does not lie within an area with a master drainage plan. Special Requirement No. 3: Condifions Requiring a Masfer Drainage Plan. Response: This project site does not meet the threshold of this special requirement; therefore, a master drainage plan is not required. Specia!Requirement No. 4: Adopted Basin or Community Plan. � Response: This project site does not lie within an adopted basin or community plan to the best of our knowledge. Special Requirement No. 5: Special Water Qualify Controls. Response: The City has already indicated special water quality controls will not be � required for this project site. Specia!Requirement No. 6: Coalescing Plate Oi!/Water Separafor. Response: This project does not meet the threshold of this Special Requirement and does not require any coalescing plate oil/water separators; however, upon the Airport's request, two coalescing plate oil/water separators are being added. Special Requirement No. 7: C/osed Depressions. Response: This project site does not discharge runoff to an existing closed depression. Special Requirement No. 8: Use of Lakes, Wetlands, or C/osed Depressions for Peak Rate Runoff Confrol. Response: This project is proposing the use of a lake for peak rate runoff control; however,the requirements of this Special Requirement do not apply to this site. Special Requirement No. 9: Delineation of 100-Year Floodplain. Response: This project abuts a lake; however, it is an airport and the site is well above the elevation of the lake and the lake has a secure outfall. Therefore, there is no 100-year floodplain on this project site. Specia!Requirement lVo. �0: Flood Protection Facilities for Type 1 and 2 Sfreams. Response: This project does not meet the threshold of this Special Requirement. Special Requiremenf No. 11: Geotechnical Analysis and Report. Response: The geotechnical analysis and report for this project have been waived per the City of Renton. Specia!Requirement No. 92: Soils Analysis and Reporf. Response: As mentioned in response to Special Requirement No. 11, the soils analysis and report have been waived for this project site. 12564.008.doc � � � J a z Q W F- � � � � O 0 M � 3.0 OFF-SITE ANALYSIS I No off-site analysis is required for this project site as the site discharges almost immediately into a 7-foot by 5-foot reinforced concrete box culvert, which discharges in a northerly direction towards the end of the airport and directly into Lake Washington. The City is well aware of this downstream drainage course and it is more than adequate to convey the runoff from this project site, which it does under existing conditions that are matched almost exactly to the proposed conditions as far as land covers go. � 12564.008.doc � � Z W � � a , � - - .:�-,�Yl':v� . ___.. . . aa � a _ � mZ _ - � � WQ m � ,�; � ' ' f GRAD � � '� � �;�'��'�; ING AND DRAINAGE PLAN 91TE DATA � � ��£ � , � � � - �� RENTON CATEWAY CEM'ER �,�r�,�+ �ra�wa�k.,�ror� ' eu�n�+o� �0a►aoo� a � SW 1/4 SE-C110N 07,11NP.23 PL,HC�E.5 E,W.liA. rr+�wn oo�emicrar+rnb ��u. rr+oro��rr�io ffi er�uts d c�oo��cr��nur�suu. � o ,s ao eo � � _�—� E�l4TED EAR'iMIM'OpC pU�11J111'C3 , � ------_�_` - _ _-----'r- ___ - y�� cr _ _ . ;,- _ - ---- ..� , .-- - �... __._�-.-- -x-:t.- _ - � _ - - � �cw � r-_ _-- _ ; ,. - _ — __- -- _ - _. __- �,. � ' �� __... . __"_` � f ��_�. . -. '_ ._ ._ ..�. _._.� ti.. ._ � _.�-- ' ��-'�� .�� .�� • � .. _ - __ ` . _..- _ — •. _ � .-. r .' 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' , ,.� y ,�n. .�;� . -_.,��--_._ r �t---�� f?��ME°+�..�'� 1lit�D A+OItIE�M�� ? `� �' i Z I � �' . �. . � - ---- � ----- , -- _ ..- -' - ' f'��OkAI C�'� I�)if,MI1 l�0.72 S� �/i►�, e: �� y al! �!L� Mo O � I . � .. :. �- -- - - Y t t a '._ . � (t2SJQS1�7lY F117t ��'rcEMGMf"� �� -- � ��"� �� W ooaacr:an s,unu M•� C4 � 8 U �,>.>.-:,a w—- - m � � m � �"' � � � m = _ � /� Z W y a 00 ��c sT f�A 5 �� Appended on: 09:51:19 Friday, October 23, 2009 12564dev Event Summary I?vent 'Pcak Q (cfs)!Pcak T (hrs)�I3yd Vol (acft) iArea (ac)'Method IRaintypc, 6 month ; O.1443 ' 8.00 � U.U478 ' 0.4700 SI3UH TYPElA , 2 year I 0.2076 ; 8.00 � 0.06)5 ` 0.4700 � SBUH �TYPE 1 A � q 3.z GPr'� � - -_ _ . _ _ _ . .__ : __ _ _ l0 year ' 0.3081 8.00 ; O.1045 � 0.4700 � S13UH iTYPElA I ' _ _ _ . _ -- -, 25 ycar U.3635 ; 8.00 0.124U ' U.470U . SBUH `'I'YYElA i . ,� � _ . . _ ; l00 ycar 0.4]87 ! 8.00 0.1436 ' 0.4700 ; SBUH (TYPEIA � I81.9 GPrt. � - . � Reco�-d Id: 12564dev Ucsi�;n A�Icthod 513�11 ';Rainfall typc , "1�1'PI:IA ' - - - - --__ _. _. _- : - -- I llyd lntv 10.00 min {Peaking Factor 484.00 - ---- _. . . ; _ _.. _ _ .. --___ ...., _._ _._ - - - a i IAbstraction Coeff ! 0.20 _ _ _ _ _ _ _ -_ -- - - . . ;._ .__ _. ; 'Yervious Area � 0.00 ac IDCIA ; 0.47 ac � �Pervious CN � ' 0.00 (llC CN � 98.00 ' Pcrvious TC � 0.00 min �DC TC 4 5.04 min j _ . _ __ _ _ �.. _ _... . _ __ _ __. . _ _ - � Directly Connected CN Calc " _ . _. ___ _ , . ;� llescription SubArea ( Sub cn _ _ _ ____, _ . Iml�e:��iou� stn�faces (pavements, roofs, etc) ' 0.47 ac 98.00 UC Composited CN (AMC 2) � 98.00 �i _ . __. . _ _ _ ; - - _ _ _ . _ __ ._ � Directly Connccted Te cai� �; _ _ _ .. -- -,- __. __ . 'I'ypc llescription � Length � Slope ; Coeff � Misc i 1'T i _ _;_ - -, - ._ ,� 'Fixed-- ' _ . _ _ � . .-- _ - _- __ ;5.00 min - i� DirecUy Connected �'C S.00min �' , , �. -- ._. ._ :; Licensed to: I3arghausen Eiigineers J� ('sw -so 1 RE��a�p �� - 33�i. I°I 5F oo3a� ! �� , , � � - So = SPEc.IFiG GRA��Ty aF o�� _ �.�3s µ = Jiscosiry oF W��ER = 0.o156'r�} � = 1=Low Ro,�E = 93•z C�RM - �� 5�_,Q�ti-� ;c��.. r�. ' ... ��:: 1J. . . _ � I. �". �� Appended on: 16:35:30 Monday,November 23, 2009 12564dev Event Summary - - -- -- --- __- - _ ___ __ __ - - - -- -- I Event �Peak Q (cfs)(Peak T(hrs)�Hyd Vol (acft)jArea (ac)IMethod Raintype - ---- - _-__-__. _ ___ ___ _ _--_ _----- _ -_ -- - -� ;6 month � 0.6514 � 8.00 l 0.2279 I 2.2400 i SBUH �TYPE 1 A ; '---- __� - - - - _ _._.. '; 2 year � 0.9393 I 8.00 �� 0.3312 � 2.2400 � SBUH �TYPEIA 4zi.s6 GPM ;---- ----- -- --- ( - � ---- ------------ -- -- _ ._. _ ---- - _ . _ � 10 year � 1.3962 8.00 0.4981 2.2400 ; SBUH TYPE 1 A ----- __-- - -- - - I 25 year 1.6481 8.00 0.5911 � 2.2400 � SBUH �TYPE 1 A __`_ ._._--- - ---_- - �--------- -----_...___ �100 year_ 1_8991 8.00 0.6842 2.2400 � SBUH �TYPE 1 A � gsz G�rt ------ ---- --------- -- -_---- ----- --� Record Id: 12564dev � __-----------.--___. _-----------.______._____ _ ,� Design Method � SBUH (Rainfall type � TYPE 1 A 1 Hyd Intv �� 10.00 min � �Peaking Factor � � 484.00 , -- -- -....-- -- -- - -- -- ' Abstraction Coeff 0.20 _ . . -- --- - --------__� --- ---- _�.- - . __ _ _ _ . � _ - -- --- ---. ..___ -------- , IPervious Area 0.00 ac DCIA I 2.24 ac � - __ __ . _.. .___ . - __ -- _ _. __ �Pervious CN � 0 00 �DC CN � 98.00 � , ----- ---- ------- ---- _ ___ - - ____ __ _ � - jPervious TC � 0.00 min f DC TC � 10.00 inin � - - ------ ------ _ __ ------- - -- - - - - ------- - --- _ _. _ _ I - _.__ _ _ _. _ __ _ __ ._. __._ _ _ _ _ _ ___ _ � Directly Connected CN Calc ,; �_-- ---- -- ------- - _----- - .._-- - ,� --- �' i F ^ Descri ption � SubArea � S u b c n �� _-__------------ __--- - -- _------___ __ ._ _ .-------. __ .._- -- -- - _ __ �_ -� --- --------_. ..; Impervious surfaces (pavements, roofs, etc) � 2.24 ac j 98.00 �---------------- ----- ------____._._... _._._.�_.. .__--------- ;i DC Composited CN (AMC 2) j� 98.00 --- --------- ------__-__---------..__.._ _ ._ _. .._�._-___ ._._______ _...- - _.. _.,� �__-_ _.-- ---._________� --- __.__ _.�- --__.---- --__ ____.-- ;- _.___ _.__. ___..____----.--- _ __.._____ �j � ^ Directly Connected TC Calc ------- ._ ___�_.__. .---__ _--._. �-------- -- - -� �..---- T e Descn hon Len th Slo e Coeff Misc TT ,I----YP _ (- -- ,p . �---g I----p (-------- - + (- _- I I � Fixed --�--- ---------i-------- - --- -----r10.00 min --- _ __------._.��-�.__ � i � Directly Connected TC � 10.00min Licensed to: Barghausen Engineers __ _ � �r Q.�,Q�o A�, = � sz s.�� sF -- sw-so _ . , �----1 P(L��oEl� � h = � 7-1�0 5� EXHIBIT C OPERATION AND MAINTENANCE MANUAL FOR CONCRETE VAULT TYPE OILNVATER SEPARATOR USING FACET INTERNATIONAL COALESCING PLATE PACKS <<< Facet <.< Intemational a c�CoR campay � Operations & Maintenance Manual for Concrete Vault Type Oil/�Vater Separator using Facet International Coalescing Plate Packs � <��Facet �.< Intemational �� Table of Contents (Low to Moderate Solids Content Design) SECTION TITLE PAGE NO. I Introduction 2 System Description and Requirements Figure 1 /Cross Section Figure 2 /MPak�Coalescing Plate Assembly 3 Safetv 4 System Installation S System Operation 6 Troubleshooting 7 Replacement Parts Information 2 <<<3 F�t <.< �ntematlona� .�� 1 A INTRODUCTION The Facet International, Inc. MPak° vault system (See Figure 1) is an enhanced gravity separation system for the removal of oil and solids from wastewater. Oil droplets, being lighter (lower specific gravity) than water, tend to rise and separate from the wastewater. In a similar manner, the higher specific gravity(heavier) solids particles fall to the bottom of the separator. The Facet International MPak system enhances this separation by the use of special patented coalescing plates (U.S. Patent No. 4,897,206) to remove droplets much more efficiently than simple gravity separators. The separator contains an inlet separation section set off from the rest of the separator by an inlet weir, a plate section, and an outlet section set off by an outlet weir. The coalescing plates are made of calcium carbonate-filled polypropylene, stacked and bound together with sturdy rods and supports into modular plate packs known as MPaks. MPaks are available in either 1/4" or 1/2" nominal plate spacing. Spacing to be utilized will be based on the conditions and separation efficiency required. The oil/water mixture flows into the separator and enters the coalescing plates. As the oil/water mixture passes horizontally through the plates, the oil droplets rise to meet the bottom of the next plate above them, where they are collected. From this point the oil droplets merge to form larger droplets that will rise through the holes located in the peaks. The oil droplets will continue to rise to the top of the separator to form an oil layer, which can then be removed periodically from the top of the separator by means of a vacuum truck or portable skimming device. Frequency of oil removal from the separator that is required will depend on the amount of oil entering the unit. An estimate of the quantity of oil to be captured by the separator may be found in the separator quotation. Actual oil removed depends on the amount of oil entering the separator. Optional equipment could include standpipe type skimmers that would remove the oil from the separator to an (optional) oil holding tank. Most of the solids drop into the bottom of the inlet collection area. Some additional solids enter the plate packs and are separated there. Solid particles that are captured by the plate packs fall to the bottom of the plate area through the solids removal holes in the "valleys" of the plates. Space has been provided under the plates for these solids. The MPaks are designed to be cleaned in place with an optional cleaning wand (See section 5.3 Maintenance). 2.0 SYSTEM DESCRIPTION AND REQUIREMENTS �'ote: The following description of a separator is a general one and some systems may vary due to differing requirements. 3 t�t�FeCet <:< Intemational .�� 2.1 Inlet Section In the inlet section of the separator, gross amounts of oil including all lazge drops will rise to the surface by gravity. Large solid particles will fall to the bottom and remain there until removed by vacuum truck or other means. The inlet section is separated from the plate section by the inlet weir. Please see Figure 1 for a cutaway of the separator showing this weir. 2.2 MPak (Coalescing Plate Pack)Section The MPak area of the separator will contain one to three rows of plate packs. The number and size of plate packs are determined by the process design conditions. These coalescing plate packs will be either 1/4" or 1/2" nominal plate spacing. A typical detail of the installation of packs is shown as Figure 2. Oil droplets not large enough to separate in the inlet chamber enter the plate packs and are captured on the underside of the plates. The oil droplets then merge to form larger droplets and run upward along the sloped bottom of the plates to the holes located in the peaks. The oil exits the holes at the peaks and rises vertically to the surface. The processed water flows out of the coalescing plate region under the oil dam into the outlet section. 2.3 Outtet Section The outlet section is equipped with a weir arrangement that causes the water to flow under the ', first weir (oil dam) and over the second weir. This effectively traps any separated oil in the first I� two sections of the separator. 'I Water flows out of the area beyond the second weir and exits the separator. 2.4 Skimmers (optional} The optional oil skimmers allow the oil to flow out of the separator to a holding tank. A �I skimmer should be located at each end of the separator. The skimmers are vertically adjustable to allow for variations in oil level that occur due to variations in the inlet oil level concentration as well as variations in water flow. The skimmers are adjustable up or down by turning the locknuts on the supporting bracket. When adjusting the skimmers, first rotate the upper part of the skimmer (expansion joint) to loosen it before making vertical adjustments with the locknuts. The inner tube moves inside the outer pipe to get the necessary adjustments. The oil flows over the top of the skimmer and down into the connecting pipe to the oil holding tank (if provided). The skimmer should be adjusted so that the top of the skimmer is less than 3/8 inch above the waste water level with very little oil accumulated and with a normal flow rate. Access to the skimmer adjustment is through the access cover. 4 t�t�Facet �:< IntemaUonal .��a�.,� If floating or other type skimmers are provided, refer to manufacturer's instructions on installation/adjustment of these devices. 3.0 SAFETY a) Normal fire prevention measures should be enforced around oil. b) Care should be taken in keeping the area clean as oiUwater mixtures can be dangerous, toxic,or hazardous. 4.0 SYSTEM INSTALLATION Flow into the separator should be controlled at the recommended flow rate for the particular application. The maximum allowable flow rate may be found on the computer sizing provided with the quotation. The vault must be vented to the atmosphere through the top covers. The flow through the separator is normally gravity flow. If a pump is used for the inlet oil/water mixture, it is recommended that a positive displacement pump or an air diaphragm pump be used. This will minimize the emulsification so the performance of the separator will not be adversely affected. Use of centrifugal pumps, globe valves or other high shear devices can cause unduly small droplet sizes and reduce performance. Excessive pressure drop in the inlet piping must be avoided, as this will cause emulsification of the oil, which will adversely affect the separator perforinance. The separator vault should be level to within 1/16 inch per foot and adequately strong to support the weight of the separator full of water. In areas where the water table fluctuates, care should ' be taken to ensure that the vault will not be damaged if it is empty when the water table rises. It is recommended that the water effluent pipe (in addition to the inlet pipe) be gravity flow. The outlet pipe must be arranged so as to be free flowing. If the outlet pipe is too small or has a high- pressure drop, water will "back up" into the sepazator, causing problems. External piping should be supported separately, not supported from the separator. To install the separator, follow these steps: 1) Connect the oiUwater inlet piping to separator inlet connection (Figure 1). It is recommended that a full port ball valve of the same size as the inlet piping be installed in the influent line to control the flow. The inlet valve (if provided) should be located at least ten pipe diameters upstream of the separator. NOTE: Excessive throttling causes 5 <<<3 F�t �.< Intemational s cv,RcoR m�y�y turbulence and emulsification. Emulsification may adversely affect sepazator performance. 2) Connect the water outlet piping to the water outlet connection (Figure 1). No valving is necessary as the weir will convol the height of the oil/water mixture in the separator. 5.0 SYSTEM OPERATION 5.1 Initial Start-Up The following procedure shall be followed after the installation of the Separator or after the Separator has been drained or pumped out and is ready to be restarted. This procedure assumes that the separator is delivered with plates installed. If plates are to be field installed, follow the procedure provided in the Maintenance section below. 1) Ensure there are no obstructions in the oil outlet or water outlet pipe. � 2) Remove cover(or open access hatches). 3) Fill tank with clean water to avoid contaminating the Separator outlet azea with oil. 4) Open the (user supplied) inlet valve to allow the oiUwater mixture into the tank. Adjust for the desired flow rate as shown on the nameplate or on the proposal if no nameplate is attached. Calculations which include flow rate have been provided with the proposal. 5) Check to see if there is an oil build-up on the surface. � 6) With flow at the required flow and some (at least 1/8") oil accumulation, set the oil '� skimmer to 3/8 inch above the water level. � 7) Check for leaks of water into the oil. I�� 8) Determine if effluent meets requirements after 15 minutes of run time. (optional) 9) Replace cover (or close hatches) after oil begins to flow out of the skimmer pipe (if j provided). 6 s`� Facet <:<3lntemational � a CLARCOR�y 5.2 NormalOperation Do not exceed the recommended flow rate, which has been previously determined. The unit can operate at any flow less than what is recommended. The flow of skimmed oil out of the skimmer pipe, once a sufficient quantity of oil has accumulated in the Separator, varies with the concentration of oil entering the system. Only oil should be removed since the oil outlet skimmer is set above the water level. Oil is lighter than water so the oil will rise higher than the water level and be skimmed off if the skimmer is adjusted properly. NOTE: An oil layer will always remain on the surface when the skimmer is adjusted properly. If skimmers are not provided, it is necessary to remove oil with a vacuum truck or portable skimmer. Frequency of oil removal will be a function of oil concentration in the inlet. TT IS THE RESPONSIBILITY OF THE OWNER TO REMOVE OIL PROMPTLY TO ENSURE ONLY OII. GETS OUT OF THE SEPARATOR AND NOT INTO THE OUTLET LINE. If the oil is not removed regularly, it may accumulate in enough volume to displace most of the water in the separator and eventually begin going under the oil dam. The frequency of solids removal is dependent on the solids concentration in the influent and can best be deternuned during operations. 5.3 Maintenance , 1) After the initial month of operation, the vault should be cleaned out as follows: �� a) Remove cover (or open hatches). b) Lower oil skimmer(s) if provided to remove all the accumulated oil or pump the oil layer out of the vault. c) Remove water from the vault. d) Clean the vault by flushing with a hose and examine the plates for blockage. e j Remove accumulated sludge with a vacuum truck or positive displacement pump such as an air operated diaphragm pump. Dispose of the sludge properly as it will contain some hydrocarbons. fl To re-start operations, follow the steps in Section 5.1 Initial Start-up. NOTE: If sludge level is 6" or more in the inlet chamber, the cleaning interval should be shortened. If less that 6" depth, interval can be increased. 7 <�<�F8C@t <i< It1t@met101181 ,��z� 2) After approximately(3) three months in operation, the Separator vault and plates should be cleaned. Inspect the inlet chamber and the entrance to the plate packs. If sludge is accumulating in the inlet chamber verify if accumulation is taking place in the plate pack entrance. If no sludge is apparent in the plate packs, clean inlet chamber and proceed with "Start-up" as defined in Section 5.1 - Initial Start-Up. If sludge is apparent in the plates of a depth 3" or less from the bottom, flush plates with water hose and return to operation. If sludge is 3" or greater, clean plates and establish a more frequent cleaning schedule or a method to reduce the inflow of solids. Minimum maintenance should not extend past six-month intervals. Generally cleaning of the plate packs without removing them from the vault is recommended if it is possible to access the top of the plates safely. Two methods may be used to clean the plates: NOTE: DO NOT disassemble the plate packs. 5.3 Maintenance (con�) a) Cleaning in place with a pressurized cleaning wand: To clean the plates, connect an (optional) cleaning wand to regular city water pressure. Check the wand to ensure that the inlet screen is in place. The wand should be provided with a valve to start and stop the water flow. A positive displacement "Sandpiper" type pump or vacuum truck should be provided for removal of the solids (along with some water) after they have been fluidized by the cleaning process. The procedure used is as follows: 1. Using the cleaning wand or a hose, fluidize the dirt in the inlet chamber and suck it out with the pump, along with some water. 2. Insert the wand in one of the cleaning holes in the row nearest the inlet of the pack. Start water flow through the wand to begin moving the solids out of the inlet end of the pack into the area immediately in front of the plates where the pump could remove them. ' 3. Push the wand gently down into the cleaning hole until it reaches bottom, maintaining I�', water flow through the wand. Move the wand up and down through the hole to ensure ! that the plates in the vicinity of the hole are thoroughly cleaned. ' 4. Move the wand to another cleaning hole in the same row and repeat the process. � 5. Continue cleaning the area served by each hole in turn until the entire pack area has been II cleaned of solids. Repeat steps 1-5 above for each pack. 8 c`� Facet <:<3lntemational ��«�� b) Flushing with fire hose or steam: , Clean the plate pack assemblies by flushing with water from the sides. A 1-1/2 'I inch fire hose at 10-15 psi or a standard garden hose at normal city water pressure (30-35 psi) are effective cleaning tools. In a similar manner, steam can also be used to flush plate packs, but CARE MUST BE TAKEN TO NOT GET THE PLATES TOO HOT. NOTE: Plates do not need to be cleaned until white. A thin coating of oil does not harm performance of the system. It may be necessary to remove some or all of the packs for cleaning outside of the vault if the fire hose method is utilized. In addition to cleaning the plates, clean the skimmers and oil removal pipes (if provided) by flushing with a hose and hot water. Hose down the interior of the vault and remove any oil and solids with the vacuum hose. NOTE: Caution should be taken that cleaning does not result in a pollution problem. 5.4 Re-installation of coalescing plate packs (if they have been removed). To replace the plates, follo�� this procedure: 1) The plate packs are designed to fit snugly within the separator. 2) Position plate packs in the same configuration (rows) as when removed. 3) Install plate packs one at a time, one row in length and one row in width, being sure the outer packs are adequately sealed against the vault wall in the same manner as before they were removed. 4) After all packs are installed, check to ensure that the packs are even and touching, forming one (or two if provided) rows of packs across the channel and that they are securely butted against the backing angle at the bottom of the separator. Please see Figure 2 for a sketch of this angle installation. Install the upper channel to ensure the plates are secured in place. 5) Secure hold down channel per Figure 2, ensuring it is snugly in place. 6) Check to see that no possibility of fluid by-passing can occur around the plates and the side wall of the tank as well as between plate pack assemblies since this could adversely affect the ef�ciency of the separator. 7) Re-start the separator as outlined in section 5. 1, Initial Start-Up. 9 � � H � 0 � � � � � $ � _ : ... ' ; T�ZI)UBLE . POSSIBLE CAUSE DIAG1V05'�"1'C CORR�CTtVE : �, . :_ 7"�'C.1�IN1'QUL� AC770N NO OIL IS DISCHARGED • Skimmer too high • Check ofl layer • Lower skimmer thickness NOTE: FOR OIL FLOW, THE �.►A� OIL LAYER HAS TD BE � ABOUT 1/2 INCHES THICK. `��+ �m � � PROCESSED WATER HAS • Flow too great • Check,flow • Slow the,�low ^ � '� OIL IN IT for application • Remove cover and rate � o � • Leakage around lnspect • Reweld or '� oil dum • Remove plates and putty where • Ptates blocked inspect leaking clean TANK IS OVERFLOWING • Output line • Check,flow • Remove restricted restrlctlon <`s�Facet <:� Intemational .�� 5.0 Replacement Information Please Note: For replacement plate packs, please contact: Facet International, Inc. 9910 E. 56`h Street North Tulsa, OK 74117 Telephone Number: (918) 272-8700 Facsimile Number: (918) 272-8787 OR Your Local Representative: Ronald Rogers , 13416 248`� Ave SE Issaquah, WA 98027 , Tel: 206-972-9011 Fax: 425-391-2705 Email: rongrogers@comcast.net 11 � C O �:. � � N � � � � C � � � c . . . 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(d� . �� . . . ��;��t��. . - (�►'�►.;��i]�i�� - i f`�'.'�i�i',�� - {�:(�:�::7r��x !�7��■ . � � � . • . -�r ,�, ;r=�� t�t�FaC@t <:� Intemational .curcoR m�a ZONE TR DESCRIPTION DATE APPROV. I, SPECIAL HDSE N�ZZLE 'GARDEN' HOSE CONNECTION 1/ ' HOSE, 6' LONG V LVE HDS wA ER JETS BARBS (TYPICAL) H�SE NOZZLE CENLARGED> � Facet lnternationcl. Inc.-1993 � Focet ��''" Internationol MPak CLEANING � � WAND � �� A 87405 6051764 19 <�<�Facet <.< Intemational a CLARCOR mmp=ry FACET PLATE PACKS CAN BE CLEANED IN PLACE! Facet International MPak°Oil-Water Separator plate packs are self-cleaning, but even self- cleaning packs can become plugged with solids under adverse conditions. For this reason, they are designed so that they can be cleaned in place to remove accumulations of solid particles. Plate type separators that are provided in lazge modules must be lifted out of the separator by a crane when contaminated with dirt. This is inconvenient and expensive, and it is possible to damage the packs during removal or re-insertion. Facet MPak°plates are designed to be cleaned in place using a special cleaning wand (Facet part number 6051764) and city water pressure. The wand has a connection just like an ordinazy garden hose and is equipped with a small conical strainer in the connection so solids in the inlet water will not clog the cleaning holds. A sketch of this wand is shown on the reverse. DIRECTIONS FOR USE OF THE CLEANING WAND Facet MPak plates may either be cleaned in place or removed and cleaned. To clean the packs, first stop the flow to the unit, remove the oil, and drain the water. For cleaning in place, connect a pressure water hose (at least 60 psig) to the special cleaning wand. Provide a vacuum truck or other means of disposing of the sludge and dirt in the vessel. Turn on the water to produce a spray from the wand and insert the tip of the wand slowly into each hold of the plate pack, starting at the upstream end. As the water flushes the dirt out of the plate packs, it should be removed by the vacuum hose or directed to an oily water sewer if one is available. For cleaning outside of the vessel, remove plate packs and other internals (except bolted-in internals). Flush with hose and cleaning wand to oily water drain. PLEASE NOTE: The spray wand produces a vigorous spray. Operators should wear waterproof clothing and goggles or facemasks. 20 EXHIBIT D OILNVATER SEPARATOR DETAILS ee UTILITY VAULT� , . . . . . . , �. o\ • , ► ► ► . : . . �� . � . �r ,' ��'' , Ir" �,��/I�j�� /�j //� I �y��I��/�j��!:� ��. . ��/I�j�� \� .. �� .�� . , � ` `,\ �,; �"� 1 . ��, . � \ � � ; - � � � � � : � � ,�> � � . � \� .. - �,. Ma11N�gAdd►ess Phone:800.892.1538 uvauburn.com PO E3ox 588 Faz:253.735.4201 Aubum.WA98071 Email:u�auburr�oldcasUcprecasLcom aeivis�onot OWdeastb►rxasLtnc. � � UTILITYVAULT� 660-CPS PROJECTED PLATE AREA=444 SqHt MAXIMUM PROCESS FLOW=415 GPM 6'-8" Top Section 6'-0" Vault UV Co. 2-332P, Galvanized Diomond Plote Cover - - — -�- -- - � � — -�— - — -�I��- ---- --f -- ' ��'��..��i ir o ��. riiriiiririirii iiiiiiiiiri �.��.�� . �� c I iiiii�iii.i.�.. i.iiiii...iiir I *�� 4 iiiiiiiiiiiiiii riiiiiiiiiiriii •��♦ ��♦ iiiiiiiiiiiiiiii iiiiiiiiiiiiiii �-o 1�� iiiiiiiiiriiiii iiiiiiiiiiiiii 7 N l.\��♦ ��\�\\��\♦ //////////i//// ////i//////////1 ;� ♦��\\\\�� \♦ �/////////////// ////////////i/i� ♦��\�� ♦\��\��♦ \ a � 7�7�///////////i ///////////1�7�/L/ � ♦\�\��\\\�\�� ♦\�\\�\\\\�\\\ ' O q �,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,� q o� .............. .............. � - ............... ............... ; �..�........... ............... ............... ....�.......... .............. ..............# 'v ro ........�...... ............... � i ........... .............. �:............ `.......�....... :.............. ...........��... - iiiiiiiiiii ii iiiiriiri..iiii a i i�i i�i�i�i�i�i�i�i o �i�i�i�i i�i�i�i i�i i�i�i�i�i# � �+.-a�t�ta- i-♦ �+a ta-��.�-a-�a-�. i I -�-� — — — II� -- J � � PL.AN VIE1N �/4" Dia. Lift Insert 4 Piaces in Tep Section 1 1/2" Dia. Lift Hole Hold-Down 1 Each Side, 2 Sides For Cooles�ing Ided�a TOP ELEVATION --� � . ', i � ,`^ i INLET I.E. — ----� - - --_� — "- � OUTLET I.E. --i - _ , - Inlet Pipe � I � With Sompling Tee 1 � ; II - -Outlet Pipe By Others i a With Sampling Tee �� , � Q _ o By Others � i u i i� . . .� i_� -T � � in ( I II� ( O ea I.� I , � v i n '� - .c "- �' ' '�' .=�i' Sediment Weir Coalescing Media �I Reto�nfng SECTION AA eatt�e STRUCTURAL NOTES: INFORMATION NEEDED: 1. Concrete: 28 Day Compressive Strength f'c= 4500 psi Top Of Seporator Elevatien: 2. Rebar: ASTM A-615 Grode 60 Iniet Pipe Size: 3. Mesh: ASTM A-185 Grade 65 Inlet Pipe Elevation: 4. Design: ACI-318-02 Building Code Outlet Pipe Size: ASTM C-857 "�linimum Structural Design Outlet Pipe Elevation: Loading For Underground Precast Concrete Utiiity Structures" BASIC DESIGN INFORMATION: 5. Loads: H-20 Truck Wheel w/ 30� Impaci Per AASHTO INFLUENT CHARACTERISTICS: Oil Specific Gravity: 0.8B GENERAL NOTES: Operating Temperature: 50' 1. All Baffles ond Weirs To Be Precost Concrete Influent Oil Concentrotion: 100 ppm 2. Static Water Depth = 4'-0" Mean Oil Droplet Size: 130 Microns 3. Contractor to: 0.33 ft/min. Rise Rote Supply ond Install All Piping & Sampling Tees Designed Per Washington State Deportmert Of Ecoicgy Grout In All Pipes 100% , Fitl With Clean Water Prior To "Start-Up" Of System FLOW EFFLUENT COLLECTED ' Verify All BLockout Sizes and Locations RnTE QUALITv SIZE 11C GPM 10 ppm 60 Micror SCALE: 3/8" = 1'-0" �2e: --- uvauburn.com ee UTJLlTY VAULT� . . , . . , . . . . . . . , . . �::t.. � l � .j• 0 :::.7. � � � � _ ' " � ' � � III� ��..� � �% `� � --%�i�� •� . � %%��%y��/i��i!% `� ��%/��/�j��/'//��'��/�/� ��!�j��//��''y//Hi��i./�//��ry/ i i��//�� I//�j,/�,.i��///Q�//�G�I/�,� i��%/j��//�j��/i�i j��//��/i�' ��I/ ��/ ��//.�!��9'�U�/'�/bI!/ ��ii��P//`/�hI/�►//�-�'c,,%�� illl� � •.�,��;��//�,,��/�ry��/y!�/, , � �'�//n�� \ \ � � a -�i�� '� �i�� ; � � � � � \�/� � � � � � � � \ u � � a i��. � � � � � \ � � � � � � � � a: � : � � � � � a � ; \ `►>: \ ��.. � \ � ;� � � ► � � �� ► \�^�� J il ' • : : � �. � •�. MakiAgAddre� Phone:800.892.1538 llvauburn.com � Pp$ox 5$8 Fax:253.735.4201 wbum,wn 98on £maiL•waubum�oiticastleprecast.com e dhtr�on d QOldeastle Pre�ast,'tr�c � UTILITYVAULT` 612-2-CPS OIL WATER SEPARATOR PROJECTED PLATE AREA=1,776 Sqfft MAXIMUM PROCESS FLOW=830 GPM �2,-�,,. UV Co. 2-332P, Galvanized UV Co. 2436P, Galvonized Diamond Plote Cover Diamond Plate Cover I 2 Places I �- - � - - - - - - -- - -- - —� ' I i ' = ;hy = I � I _ � � A A I � i :w:%�:%:%%�� I � � _ � — — ---------- - -- — — — — ! � 4-Ton Lift Anchor 4 P;aces In Top Sec6on PLAN VIEW 01 Retain�ng TOP ELEVATION Baffle i_-�s_--.. : � . ,�--� _ ------- —1 ' �, � . - - - � '� 7 `-. �' � -� � i �j — -- f Ti , OPTIONAL TOPS r -----— r----- � ', � Coalescing Media 2'-7° and 3'-7" Heights Hold-Downs f I INLET I.E. 1 j - ;r_ _Q __ Q _ _ OUTLET I.E. INLET PIPE fi�J �� .� a With Sompling Tee � � � By Others I � i � °� �� ,,� I, cO— —OUTLET PIPE Sediment .{ a � With Sampling Tee Weir o � By Others '` I � •OUTLET PIPE TO BE LARGER � '' � �, , THAN INLET PIPE ' � - �— �_� �,.. o; • . .. .' . - . •J , - . . - . � . .. . .. ' � �p Liftinq Iron Coalescing Media 2 Each End, 2 Ends SECTION AA STRUCTURAL NOTES: INFORMATION NEEDED: 1. Concrete: 28 Doy Compressive Strength f'c= 4500 psi Top Of Seporator Elevotion: 2. Rebar: ASTM A-615 Grode 60 Inlet Pipe Size: 3. Mesh: ASTM A-185 Grode 65 Inlet Pipe Elevation: �. Design: ACI-318-02 Building Code Outlet Pipe Size: ASTM C-857 "Minimum Structural Design Outlet Pipe Elevation: Loading For Underground Precast Concrete Utility Structures BASIC DESIGN INFOR�IATION: 5. Loads: H-20 Truck Wheel w/ 30% Impact Per AASHTO INfLUENT CHARACTERISTICS: Oil Specific Gravity: 0.88 GENERAL NOTES: Operating Temperature: 50' 1. All Baffles and Weirs To Be Precast Concrete Iniluent Oil Concentration: 100 ppm 2. Stotic Woter Depth = 4'-0` Meon o�l Droplet Size: 130 Microns 3. Contractor to: 0.033 ft/min Oit Rise Rate Supply and Install A�I Piping & Sampling Tees Designed Per Washington State Deportment Of Ecoloqy Grout In All Pipes 100% Fill �th Clean Water Prior To "Start-Up" Of System FLOW EFFLUENT COLLECTED Verify All BLockout Sizes ond Locotions RATE QUALIlY SIZE 438 GPM 10 ppm 60 Micron SCALE: t/4" = 1'-0" 132.1 uvauburn.com