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HomeMy WebLinkAboutBoeing Commercial Airplane Group(1) 9L BE&C ENGINEERS BE&C ENGINEERS DRAINAGE CALCULATIONS FOR STORM DRAINAGE IMPROVEMENTS APRON A RENTON MUNICIPAL AIRPORT RENTON, WASHINGTON SEPTEMBER 8, 1993 Prepared For: BOEING COMMERCIAL AIRPLANE GROUP Renton, Washington Prepared By: BE&C ENGINEERS P.O. Box 3707 Renton, Washington 98124-2207 Document Number: 326-RTN-R-93026-CALC-C-1 CFigured By: B.R. Dunlap, P.E. �.� L) dot NvAsyj� Checked By: D Donovan, P.E. Approved By: �� �,�" W. E. Moor, P.E., S.E. o rc;5542 2 SI�NAIL EXPIRES 11/7�3 mlj:93026:CS 9/9/93 BE&C P.O. Box 3707 D g A i N A G,& P L A t4 ENGINEERS Seattle, Washington 98124.2207 Mail Stop: PROJECT_ AP/�lU ZMr'ecyEMrnlfis JOBNO. RN- K-g3oz6 -93076 FIG. BY �U�✓Li�6 CHECKED BY D`� DATE -6,2,q' 93 SHEET OF_ 1 J J� � j 1 S„SI J 72 c � � I � tic 3 N i 2 0° i w o a 1 X-23771 REV. 5/90 F P DRAIN AGE ENG AR A C P.O. Box 3707 ENGINEERS Seattle, Washington 98124.2207 N.p P'U tj0 FF Mail Stop: PROJECT AF'9QtJ A -IMPROL16MEPTS JOB NO. FIG. BY B, DUN Lfj t� CHECKED BY D D DATE __ 7--7" 99 SHEET OF_ 1)1m6 J51Dn1S DP 11t,)A6,C L16F+T PU511,1w-j E- W N- S HP-,EA (S. F,) ZS, 7�0 27, 20q A - AVM Z,10 ' 16q, I 3� 4-g� A - 6 AU6, 14 5, f 2 3 A - -7 I A✓6 . 241 ' 2g0 ' A -- 'q 2 DO ' 3 30 ' T�2� 4_c� V f+ I . ,I = 7, 42 Ac�kS /1 M 0 u M T d F k f1,,J Fia c L- /20,-7 Z-y2 24-N,Q Srv2•t-► Pr�i,E1FAGG- = 2. Ov /nJc�iE� 57c��W�dAr4:�_ �'uGFr SOVND FiGu�E zS 111�L cNT Off' y11 v Z4-#tC P14CA 717-1,2 5-ro 2 M P(J6 E=7" SJ UtJl) s, ► ,,(V AID AIv44-- 54 5 TfM- 6-MZ) :T,eM X-23771 REV. 5/90 STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN 3 Significant progress has been made by the United States Geological Survey (in cooperation with the counties of King, Snohomish, Pierce, and Thurston, and METRO) with the development of a local version of the HSPF model. This work has involved development of "runoff files" for various land types defined by vegetation, slope, and soil type (3) . These runoff files will describe runoff characteristics of simulated runoff from a watershed with measured runoff. As a result, one will be able to simulate runoff from any other ungauged basin where only the distribution of land types is known. The model will be able to be applied on individual development sites of less than about 200 acres. This work is expected to be completed within the next year through a grant with the Center for Urban Water Resources Management at the University of Washington. A continuous simulation model has a considerable advantage over the SCS and Rational Methods (and sir~ilar methods) that are single event-based. The single event model cannot take int,_, account storm events that may occur just before or just after the single event (the design storm) that is under consideration. In addition, the runoff files generated for the HSPF model are the result of a considerable effort to introduce local parameters into the model and are therefore believed to result in better estimation of runoff than the SCS or Rational methods. On the other hand, the HSPF model is relatively complex to use and is best suited for large scale applications such as basin plans or master drainage plans (see below) . III-1.4 HYDROGRAPH METHOD Hydrograph analysis utilizes the standard plot of runoff flow versus time for a given design storm, thereby allowing the key characteristics of runoff such as .peak, volume, and phasing to be considered in the design of drainage facilities. The physical characteristics of the site and the design storm determine the ) magnitude, volume, and duration of the runoff hydrograph. Other factors such as the conveyance characteristics of channel or pipe, merging tributary flows, branching of channels, and flooding of lowlands can alter the shape and magnitude of the hydrograph. In the following sections, the key elements of hydrograph analysis are presented, namely: • Design storm hyetograph • Runoff parameters • Hydrograph synthesis • Hydrograph routing • Hydrograph summation and phasing • Computer applications III-1.4. 1 Design Storm Hyetograph All storm event hydrograph methods require the input of a rainfall distribution or design storm hyetograph. The design storm hyetograph is essentiallv a plot of r-i fall depth versus time for a given design storm frequency and duration. It is usually presented as a dimensionless plot of unit rainfall ept (increment rainfall depth for each time interval divided by the total rainfall depth) versus time. The hyetograph provided in this section is to be used for all hydrograph analysis. See Figure III-1.2 and Table III-1. 1. The hyetograph is the standard SCS Type lA III-1-4 FEBRUARY, 1992 4 STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN rainfall distribution resolved to 10-minute-time intervals for greater sensitivity 1 in computing peak rates of runoff in urbanizing basins. The hyetograph was interpolated by Surface Water Management Division staff from King County from the SCS mass distribution and may differ slightly from the distribution used in other SCS-based computer models, particularly those which are not resolved to 10-minute time intervals. The design storm hyetograph is constructed by multiplying the dimensionless hyetograph times the rainfall depth (in inches) for the design storm. The total depth of rainfall (in tenths of an inch) for storms of 24-hour duration and 2, 5, 10, 25, 50, and 100-year recurrence intervals are published by the National Oceanic and Atmospheric Administration (NOAA) . The information is presented in the form of "isopluvial" maps for each state. Isopluvial maps are maps where the contours represent total inches of rainfall for a specific duration. Isopluvial maps for the Puget Sound b:isin for the 2, 5, 10, 25, 50, and 100-year recurrence interval and 24-hour duration storm events can be found in the NOAA Atlas 2, "Precipitation - Frequency Atlas of the Western United States, Volume IX- Washington. Appendix III-Z-A provides the isopluvials for the 2, 10, and 100-year, 24-hour design storms for the Puget Sound basin. .<Z For project sites with tributary drainage areas above elevation 1000 MSL, an additional total precipitation must be added to the total depth of rainfall, for the 25, 50, and 100-year design storm events, to account for the potential average snowmelt which occurs during major storm events. This M. factor is computed as follows: M. (in inches) = 0.004 (MB,i - 1000) ; where: ?A MB.1 = the mean tributary basin elevation above sea level (in feet) . Example: Given: Project location: East of North Bend near 1-90. MB,i = 1837 feet. Design Storm Event: 25-year (for culvert sizing) ; P,, = 7 inches Compute: M, = 0.004 (MB.1 - 1000) = (0.004) (1637 - 1000) = 3.35 inches Adjusted Ps = Ps + M. = (7 inches) + (3.35 inches) = 10.35 inches III-1-5 FEBRUARY, 1992 STORMWATER MANAGEMENT MANUAL FOR THE PUC;ET SOUND BASIN Table III-1.1 24-hour Design Storm Hyetograph Values TIME FROM CUMUL. TIME FROM CUMUL. I TIME FROM CUMUL. BEGINNING PERCENT PERCENT BEGINNING PERCENT PERCENTI BEGINNING PERCENT PERCENT OF STORM RAINFALL RAINFALL OF STORM RAINFAL RAINFALq OF STORM RAINFALL RAINFALL 0 0.00 0.00 490 1.80 46.34 980 0.50 81.40 10 0.40 0.40 500 1.34 47.68 990 0.50 81.90 20 0.40 0.80 510 1.34 49.02 1000 0.50 82.40 30 0.40 1.20 520 1.34 50.36 1010 0.40 82.80 40 0.40 1.60 530 0.88 51.24 1020 0.40 83.20 SO 0.40 2.00 540 0.88 52.12 1030 0.40 83.60 60 0.40 1 2.40 550 0.88 53.00 1040 0.40 84.00 70 0.40 2.80 560 0.88 53.88 1050 0.40 84.40 80 0.40 3.20 570 0.88 54.76 1060 0.40 84.80 90 0.40 3.60 580 0.88 55.64 1070 0.40 85.20 100 0.40 4.00 590 0.88 56.52 1080 0.40 85.60 110 0.50 4.50 600 0.88 57.40 1090 0.40 86.00 120 0.50 5.00 610 0.88 58.28 1100 0.40 86.40 130 0.50 5.50 620 0.88 59.16 1110 0.40 86.80 140 0.50 6.00 630 0.88 60.04 1120 0.40 87.20 ISO 0.50 6.50 640 0.88 60.92 1130 0.40 87.60 160 0.50 7.00 650 0.72 61.64 1140 0.40 88.00 170 0.60 7.60 660 0.72 62.36 1150 0.40 88.40 180 0.60 8.20 670 0.72 63.08 1160 0.40 88.80 190 0.60 8.80 680 0.72 63.80 1170 0.40 89.20 200 0.60 9.40 690 0.72 64.52 1180 0.40 89.60 210 0.60 10.00 700 0.72 65.24 H 90 0.40 90.00 220 0.60 10.60 710 0.72 65.96 1200 0.40 90.40 230 0.70 11.30 720 0.72 66.68 1210 0.40 90.80 240 0.70 1 12.00 730 0.72 67.40 1220 0.40 91.20 250 0.70 12.70 740 0.72 68.12 1230 0.40 91.60 260 0.70 13.40 750 0.72 68.84 1240 0.40 92.00 270 0.70 14.10 760 0.72 69.56 1250 0.40 92.40 280 0.70 14.80 770 0.57 70.13 1260 0.40 92.80 290 0.82 15.62 780 0.57 70.70 1270 0.40 93.20 300 0.82 16.44 790 0.57 71.27 1280 0.40 93.60 310 0.82 17.26 800 0.57 71.84 1290 0.40 94.00 320 0.82 18.08 810 0.57 72.41 1300 0.40 94.40 330 0.82 18.90 820 0.57 72.98 1310 0.40 94.80 340 0.82 19.72 830 0.57 73.55 1320 0.40 95.20 350 0.95 20.67 840 0.57 74.12 1330 0.40 95.60 360 0.95 21.62 850 0.57 74.69 1340 0.40 96.00 370 0.95 22.57 860 0.57 75.26 1350 0.40 96.40 380 0.95 23.52 870 0.57 75.83 1360 0.40 96.80 390 0.95 24.47 880 0.57 76.40 1370 0.40 97.20 400 0.95 25.42 890 0.50 76.90 1380 0.40 97.60 410 1.34 26.76 900 0.50 77.40 1390 0.40 98.00 420 1.3-1 28.10 910 0.50 77.90 1400 0.40 98.40 430 1.34 29.44 920 0.50 78.40 1410 0.40 98.80 440 1.80 31.24 930 0.50 78.90 1420 0.40 99.20 450 1.80 33.04 940 0.50 79.40 1430 0.40 99.60 460 3.40 36.44 950 0.50 79.90 1440 0.40 100.00 470 5.40 41.84 960 0.50 80.40 480 2.70 44.54 970 0.50 80.90 III-1-6 FEBRUARY, 1992 0FY BE&C P.O. Box 3707 /� ENGINEERS Seattle, Washington 98124.2207 ���v'" /" Mail Stop: i PROJECT- 14R"e0tJ >'MPRdVCMtrJ75 JOB NO. -7 FIG. BY 6, -/nn✓4 L 4-P CHECKED BY D-) n DATE �i / �-3 SHEET 6 OF_ $i9 SEA Opt/ Z¢—ff2- 15/�N STv�C 1), yCTa 4,PAPH t94 P2E✓iovs .s�fEE�; C��c���4TC dr��iods T.ME PL4- PE"iqlC F�o�vs Fv t�o�� 2-y� ? -H,e s rve.►r ,moo 46-mej ZJ-44 7 r�L- Ra1vof11-- fog 2-Y,?- s4-kc s72,02M S Bps OA) ToTi9 L ��1��c/�i9GL -ig�D .�MP�2t//Oc�5��55 F.�rD2 P��trA f1/Lb?a '"D. Civ .�1�'!P• l�/Jc�`D� f�55ccIM FRO f?P20�J f} 1 Z t 4�74 1C�� A06 b,�6GF5 oJc� NTI(%. 24- H2:j, MinJv�"ES TlMC fllvM /� PERIC 2-r�i2 Pk ID.h1Id 6 Mo-eq- BEGINN�nf4 KvNOf=F RoNOFF �MM of 57o2n1 RJrJot' T3 GT3 000 34- 1,34-1 (o� �-o // 80 873 ¢�0 /1 8 �3 4 6 0 3,40IV 309 OV62 4154,e o��2 Pry z-YP- 24-NP. +Ro /, 8() 873 10'M'IJ OF 1044 1 Of" P&ht.-, PER, 5,00 /,3 50 2-Y2 1A-'NR �/v �,3 6-051°�� S�oR� /ram �/�L � I Z►D�r�'rT3 o � vt�'rvt X-23771 REV. 5/90 BE&C P.O. Box 3707 SL O?"TFD Ar5 p ArAj ENGINEERS Seattle, Washington 98124-2207 H YIOR 14 U L/c 5 Mail Stop: PROJECT 96109D AJ ^�n .7MP'�✓E14NTs JOB NO. FIG.BY 1.�1 ��NZ—* CHECKED BY -D JQ DATE 6,Z-44—,`3 SHEET OF_ DeoP PV F-616A rr F-L 471'0iJ /9—l TD 11�, �itJD 1�21Pz= 20, 77 P�9v'T 54 of; 9 oO 'fo 5&0 �ev beeA/tJ �,Ilgrere-s B67TwFe-Itj i FT rti a o r-( T / FT /.,j /sa Fr 13E7zc)c i ?J /, Z 5 % /q-/vQ o.6 G'fJPAC(Ty h z/ 3a, �e- 3, 14- o. o� l xD, o7S� 4-, 0� vNv�/2 �f6A✓� (`!/G L Sc.vT o /'iP�, f}N.D AT 26g7 GPM z sir pa�,►� C®L L EC 7" ') L 0/= //, .3 0ca 47,4 4-C Co AJ 5 3 4 m ,,,1 X-23771 REV. 5/90 /� T0� BE&C P.O. Box 3707 � �.�M ����5 ENGINEERS Seattle, Washington 98124-2207 Mail Stop: PROJECT— dEfO lIj 4 -'MPKMOMEN1- JOB NO. FIG. BY C)21VI-6? CHECKED BY - QJ DATE 9-3 SHEET 8 OF_ p�s/67 AJ S TO,�n� pe�g�Nr�G,E f}rvo Fv�L SI'i LL Coti7-1-�/nJmelur TD Mli-iao.97z�- orF 79, 5"8 F r-3 6 9�% i J 24- - Ot- v�vr=j= Dc. v2 © r/,✓jz P�HK lo-n-y,A)'jTs a�= si�2MJ 41- �vty� io M�,v �r°�;1 BE&Ci P.O. Box 3707 ENGINEERS Seattle, Washington 98124-2207 Q Mail Stop: PROJECT r/P�0/J A �MP�PDdc�M�NTs JOB NO. FIG. BY 16• w/�L�� CHECKED BY - D J 1) DATE 7- 7- 4?3 SHEET-1 OF_ 5r0 klq6 4. IAJ srV eM 5,6744Fe- ss0s r2f'-14 rAXIw,4Y 5(.O?E f 0.0057 r-T/r-?- 6''�Sc.ot IV Pi'E ----�-, i Za, 79 L FLA ¢36 .8 '� p om Fi G D 5v�2J� � 5TDocA6E /rJ P/PC AVA Y4f, I >< TT D - ' - 5fv,C1RG ' f1+/4 164.q> 6?0 6,1- I —f1(� � .STD. �' __--- 57vR& 1N Pl,?� 4 ca= 2-zoo r7�)c- F —. 4.4-g00 FX/4;r J`LOTT ,VEw c 3 t wcrTi - 4uiotitf Ic b Z I� is p i" Ko� i s-r 0 TOFF VA L�E E(—ECr 4PC—P,4- DF—) J ID"SDr c ►—G� 1 0/0) SLPAP-A C"o2 r"o �•. r E3 vac Co m TR o L- rL.cxJ TO G(ZrPrl Z- 7'Hf3IJ 2 STORMR-" ' to2��/ c"= I NEW M 1q. G 500 Lem L M Nr 5 P/L 'L V11 VL.H ._ C� ASPH RLAY NC SGP =`•. EL 4-0.97 CONC TORM DRAIN -, " 1 `ti 42 14.8 15.6 SG " SGP SINGLE `ELLOW N - c0 r � :1 = SINGLE YEItOw SG A• AnC Vow \� QK CATC BASIN TOP20.46 = _ TOPN'RR V 1 417.41 .�ti COMPOSITE �ASPN HOv CV BOT fi6.8 ASPH Y' PAD ASPH - ASPH - I l� STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN CHAPTER III-7 OIL/WATER SEPARATORS III-7 .1 OVERVIEW Oil/Water Separators have limited application in stormwater treatment because their treatment mechanisms are not well-suited to the "wastewater" characteristics of stormwater runoff (i.e. , highly variable flow with high discharge rates, turbulent flow regime, low oil concentration, high suspended solids concentration) . In addition, separators can require intensive mai =enance, further restricting their desirability as a stormwater treatment BMP. The primary use of oil/water separators will be in cases where oil spills are a concern, in which case a spill control (SC- type) separator may be specified. There will be but a few other cases where an oil/water separator would be required, as other BMPr are more appropriate for controlling oil. Source control in particular should be the first option and ma;; negate the need for special treatment. Other than to capture spills, the use of oil/water separators will be restricted to development sites that have high oil and grease loadings, such as petroleum storage yards and vehicle storage and/or maintenance facilities (see Chapters I-4 and IV-2 for land uses which require oil/water separators) . There may be some cases that warrant the use of oil/water separators due to high vehicular traffic. These will have to be assessed on a case- by-case basis by the local government. Sand filtration and oil absorbent materials are being investigated as alternatives to oil/water separators . While there is very limited data on the effectiveness of sand filtration f. - treating oil, this practice does have an established record of treatment of othe pollutants and effective treatment of oil may also be accomplished. Sand filtration is to be considered an alternative to oil/water separators on an interim basis until further data is collected. See Chapter III-3 for details on sand filtration BMPs. Absorbent materials are another alternative whose use has been pioneered by METRO in King County. Widely used for controlling spills, these "pillows" have been installed in storm drain inlets as a mechanism to absorb free oil from surface water runoff. Limited data is available to assess their effectiveness and some operational problems have occurred. The disposal of these pillows once they are exhausted can be a problem as well. Three types of oil/water separators are discussed in this chapter: BMP RO.05 Spill Control (SC-type) Separator BMP RO.10 API Separator BMP RO. 15 Coalescing Plate Separator (CPS) _ See Figures III-7.1, III-7.2, and III-7.3 for illustrations of these BMPs. Because separators are usually manufactured units rather than constructed units, only limited details will be provided in this chapter. If oil/water separators are to be used, then an appropriate manufacturer or supplier should be contact`d. For a useful discussion of oil treatment of stormwater runoff the reader is referred to the publication "Oil and Water Don't Mix: The Application of Oil-Water Separation Technologies in Stormwater Quality Management" (METRO, October, 1990) . III-7-1 FEBRUARY, 1992 . � 3 STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN 1 wotof So rotor 11 Oil Duffel r i woler Inlet Coalescing Emergency plot., overflow \ flow Water Inlet Dante from streets, Watertl h parking lots g t or other cleanout catch gate basins Water Figure III-7.3 level \ CPS Separator Water Grease and r;: outlet oil float �^, on retained Wafer ,�w—y eia ,•,y,/ �� '\ r Clean Separator ` undertlow... vault Figure III-7.1 Figure III-7.2 SC-Type Separator API Separator Clear Oil retention Oil Oil separation Flow distribution well baffle skimmer compartment baffle Water i \ / outlet Water ...... . ) y' ..._................................. Inlet �\\ /�.M \ '-T Inspection and Grit/sludge sampling tee removal baffle III-7-2 FEBRUARY, 1992 STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN III-7 .2 PLANNING CONSIDERATIONS AND GENERAL DESIGN CRITERIA If an oil/water separator is used primarily for treatment (and not spill control) , it should be located off-line from the primary conveyance/detention system. The contributing drainage area should be completely impervious and as small as necessary to contain the sources of oil. Non-source contributing areas only increase the size (and cost) of the separator and do not improve effectiveness. Under no circumstances should any portion of the contributing drainage area contain disturbed pervious areas which can be sources of sediment. Description There are three general types of separators. The first type is the spill control separator (SC) . It is a simple underground vault or manhole with a "T" outlet (Figure III-7.1) . The SC-separator is effective at retaining only small spills. The SC-separator will not remove diluted oil droplets spread through the stormwater from oil-contaminated pavement. The other two types of separators can remove dispersed oil: the American Petroleum Institute (API) separator (Figure III-7 .2) and coalescing plate separator (CPS - Figure III-7.3) . The API-separator is a long vault or basin with baffles to improve the hydraulic conditions for treatment. Large API-separators may have sophisticated mechanical equipment for removing oil from the surface and settled solids from the bottom. However, most applications will use the simple system as illustrated. T e CPS-sc arator contains a bundle of 2lates made of fiberglass or polypropylene. �bp nla*tea are r aPl spaced Depending on the manufacturer an or application, _the plates may be positioned in the bundle at an angle of 45 to 600 from the horizontal. The closely spaced plates improve the hydraulic conditions in the CPS-separator promoting oil removal. The primary✓ advantage of the CPS-separator is its ability to t_heoretically achieve equal removal efficiencies with one fifth to one-half the space needed by the API separator, when designed to remove the same size droplets Type of Separator Required Land uses that must use an API or CPS-separator are identified in Chapter I-4 and in Chapter IV-2. The owner may choose between the API or CPS-separator using the design criteria outlined below. Other land uses or businesses should use the SC- separator for spill control as needed. Effluent Guideline Ecology requires that stormwater have no visible sheen, average less than 10 mg/1 daily and at no time exceed a daily maximum of 15 mg/1. Design Criteria Requirements regardless of separator type 1. Separators should precede all other treatment and streambank erosion control BMPs. 2. Appropriate removal covers must be provided that allow access for observation and maintenance. III-7-3 FEBRUARY, 1992 t � STORMWATER MANAGEMENT MANUAL FOR THE PUCET SOUND BASIN 3. Stormwater from building rooftops and other impervious surfaces not likely to be contaminated by oil shall not discharge to the separator. 4. Any pump mechanism shall be installed downstream of the separator to prevent oil emulsification. Additional requirements for API and CPS-separators 1. Separators are to be sized for the 6-month 24-hour design storm. Larger storm© shall not be allowed to enter the separator; the use of an isolation/diversion structure is recommended (see Chapter III-3 for details) . 2. Separators shall have a forebay to collect floatables and the larger settleable solids. Its surface area shall not be less than 20 square feet (ft2 ) per 10,000 ft2 of the area draining to the separator. Additional requirements for CPS-separators 1. Plates shall not be less than 3/4 inch apart. 2. The angle of the plates shall be from 45' to 601 from the horizontal. Absorbent pillows may be used in separators. For API and CPS-type separators they should be placed in an afterbay. With the SC-separator, absorbent materials should be placed in the manhole/vault. Used absorbent pillows will need to be properly disposed of. Sizing Procedure Oil droplets exist in water in a wide distribution of sizes. The separator therefore is sized to remove all droplets of particular size and greater which will ensure that sufficient oil is removed to achieve the effluent standard. API-separators are usually sized to remove oil droplets 150 micron in size and larger. Smaller droplets rise so slowly as to require a relatively large vault. CPS-separators are commonly sized to remove 60 or 90 micron and larger oil droplets. There are no data on the size distribution of dispersed oil in stormwater from commercial or industrial land uses with the exception of petroleum products storage terminals. These data indicate that by volume, about 80 percent of the droplets are greater than 90 micron. Less than 30 percent are greater than 150 microns. For this manual both the API and CPS-separator are sized to remove 60 microns and larger droplets at a temperature of 100C giving a rise rate of 0.033 feet per minute. The requirement for treatment of 60 micron and larger sized droplets may preclude the use of API separators. API-Separator Sizing API-separators are sized using these general guidelines. • Horizontal velocity: 3 fpm or 15 times the rise rate whichever is smaller (rise rate of 0.033 ft/min is recommended) • Depth of 3 to 8 feet • Depth to width ratio of 0.3 to 0.5 • Width of 6 to 16 feet III-7-4 FEBRUARY, 1992 STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN / d • Baffle height to depth ratios of 0.85 for top baffles and 0. 15 for bottom baffles The separator is first sized for depth using the equation: Depth = (Q/2V1 ) 1/2 where: Q = design flow (cfm) Vh = design horizontal velocity (fpm) = 0.50 (15 times 0.033) Calculate the width using the above ratios (i.e. , 0.3 to 0. 5 depth-to-width ratio) . Then calculate length using the equation: Depth (Q/2Vh)1/2 (Q/2Vh) 1/2 Length = -----•---- * Vh = ---------- * 0. 50 = Rise Rate 0.033 0.066 CPS-Separator Sizing Calculate the projected (horizontal) surface area of plates required using the following equation: Q AP = --------- Rise Rate Where AP = projected surface area of the plate (ft.2) ; note that the actual surface area, A. = AP * cosine H H = angle of the plates with the horizontal in degrees, usually varies from 45-60 degrees. Q = design flow (cfm) . Rise rate - recommend using 0.033 ft/min. Manufacturers of plate packs provide standard size packages which are rated at a particular flow (usually in gpm) . However, as the manufacturer' s flow rating is for conditions different than used above, the engineer must compare the plate surface area with the above calculation. Do not confuse the projected plate area with actual plate area (see Figure III-7.4) . The width, depth, and length of the plate pack and the chamber in which the plate pack is placed is completely flexible and is a function of the plate sizes provided by the particular pack manufacturer and standard size vaults that are available for small sites. III-7 .3 CONSTRUCTION AND MAINTENANCE Construction Specifications There are r.� special construction considerations. III-7-5 FEBRUARY, 1992 STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN Figure III-7.4 Cross-Section of CPS Oil/Water Separator N � 45° to 60° Aa Actual Plate AreaIN / J Ap Protected IHorlxontall Plate Area Maintenance oil/water separators must be cleaned frequently to keep accumulated oil from escaping during storms. They must always be cleaned by October 15 to remove material that has accumulated during the dry season, and again after a significant storm. In addition: 1. The facility shall be inspected weekly by the owner. 2. oil absorbent pads are to be replaced as needed but shall always be replaced in the fall prior to the wet season and in the spring. 3. The effluent shutoff valve is to be closed during cleaning operations. 4. Waste oil and residuals shall be disposed in accordance with current local government Health Department requirements. S. Any standing water removed during the maintenance operation must be disposed to a sanitary sewer at a discharge location approved by the local government. 6. Any standing water removed shall be replaced with clean water to prevent oil carry-over through the outlet weir or orifice. III-7-6 FEBRUARY, 1992 i �L �Ub.>��+z5:. �1 .Jul 15 yj 6 : U2 Nc . UU2-4 -t3—.� � 612-1 -CPS OIL / WATER SEPARATOR 1,57E SO.FT.-EFFECTIVE COALESCINQ AREA 830 G.P.M.-MAXIMUM PROCESS FLOW UV Co 3030P DIAMOND PLATE COVER TOP SECTION 2 PLACES No.612.TL-CPS -� 6,E20 Itm UV Co 4050 DIAMOND PLATE COVtH I-1 -- � 1•' I!II �-11--I- t^• .I•I l l l l �+.-1-I L. •� I-1-I i I-I 1 y I ,J i-1-1--I-i-i 1 •`` 1 I I I hI•I•I.1.,. A`� I 'lll'{I I'I'lllll'I'1'I'I'lllll \ I-1 11 I- I I LI I r I�T'T I�1 I-I ``.�` 1- I I I• I l j I-i I I I I-1-I I I I-1- \� I-I.1 11 I-I 1 I Tj-- I-II I I I-1-I I I I-�I-I- \•• Ir I -1117 1 I•I�I 11 1 II I-1 I I I ,-I I 'I`-I I•I r l - ,: T�!!!1i�!!-I�.II!!Ir7!1-iI-l!1f T!Ii-IlT!T-Il!T-I-IIT-!T iIIT.1i-Ti!!1i.-TIII T-1-i --l--I-1-1-1-1-1-1-11-I lI I.-I;..1 1I I---IIIITIT T'V11VT- T-1-1---.f.I1.Il I-1IY!lIl•III- ,I! JlIN, A.I1"" IT' -T!1 1I. - -I-I I-I-1 I- •l�II T1'lj•-I I1•!-!I{•;•I1I!- hlI iII !lI�iI !11 Ti!!;i IrT• I I- I 1'•6' \` `� I-I- I •ili 1 i 1 OUILETPIPE \•� - 1 1 1 l,111 WITH SAMPLING It BY OTI1[RS BASE ASSEMBLY No. 612.1-CPS - / FIBEfl(ILASS IIOLD•DOWN CHANNEI. OUTLCT WE=1f1 OIL RETAINING BAFFLE f0 COALESCING MEDIA�\� \� �*•. ��' '/` INLET PIPE 6'•e' WIIHELBOW BY OTI IERS INLET WEIR V ITEMS SHOWN ARE SUBJECT TO CHANCE ! WITHOUT NOTICE. FOR DETAILS SEE REVERSE SiCi- Copyrighi 092 126 A(prif, !9, Vl� N4�JLK r5H 1 LL : 1Ub3248331 Jul 1b 93 8 : U3 N0 .UU2 .p_ - 11,12*11913 12,21 FROM FACET 11n,111iAUI,110N TA 12011240111 P.82 /9 1 �i:*i!e*+k+kink+kNtd:+b+k+NMesl:*K��M+iRquR+lel��CK71ex�K*:}jKMaAeJIe**l�+kA0K�K1k�eNe)kY,t�kf�ek�k7k�1'k�k�k�kN�N�*khNN�4+ FACET INTERNATIONAL, INC. 'rIJLSA, OKLAHOMA "MPak" PEIRP'ORMANCL' CALCULATIONS OUST: I30EING-RENTON REF: � JOF3: APRON A,, POS I--i DATE: 12-Jul-93 N&d�M:►11k:+k**+k+k+K A�k+R�ce�crKlkMc�K1K�K�k�kfk�k�klk�kk=�K�K�Kye4;*�* AnKzCeY*�Nc�kN'Mfk NcMcsN ry*4uk�k3r**k�k,k'#4:* INPUT EFFLUENT` CHARACTERISTICS .__T------------------ -�_`C;ONTINUOUS-FLUID_` PHASE; 91 OIL WATER __-- .�_..-..___- YYM fi.7 FLOW RATE - C:PM 6•140 996 TEMPERATURE - p 60 X REDUCTION 93.3 VISCUSTTY - CP 1.308 SPRCIFIC GRAVITY 1..UUU 10UX CULL - MICR 47 IMMISCIBLE PHASES CC lob RATE-LDS/HR 46.04 -GAL/H13 PHASE Al OIL 8.68 _ _ _ _ SPECIFIC C7RAVITY ------- 0 0 O.93 --.-..----- — f* Tk.'�I}' (DEG F') 60 0 ----0.0 GPEC GRAY USED 0.834 CONCEN'r- FPM 100 0 0.0 PARTrCLE DIST- LOG NORMAL CONQ - PPM 100 0 0 MEAN - MICRONS 130 �D 8TANDA,RD DEV 2.5 0 0.00 J �/ U0 0 0 PLATE PAC K �. CHAR.AC2�.1;tI3TTC5 D 0 0 --------'�----------------- 0 0 WIDTH - FEET 12.0 0 U HEIGHT - FEET 6.0 0 0 LENGTH - FEET 2.0 P (� PLATE BANKS 12 ' PHASE42 SULlllb PLATES/PT HEIG17 - - - 0 0 COLLECT AREA- FT2 13392 0 �} 0 0.000 FLUID VELOC - FPyI 2.3 0 0 REYNOLDS NO. 93 0 % OF ,LAM LIMIT 5 0 0 0 p U p 0 0 0 ; U U � U p 0 U 0 0 ' 0 0 TELEPHONE: $00• 223-9910 TELEFAX: 918-272--8787 NW F WEK 1 5H T EL : 2066248331 Jul 15 93 8 :03 NO . 002_.W-{} 81,12/1993 12,21 FROM FRCET "ONTEKiRVIRTION TO 12043249331 P.04 O FACET INTERNATIONAL, INC. TULSA, OKLAHOMA "MPak" PERFORMANCE CALCULATIoNs C,UST: BORING-RENTON JOB: APRON A. 'OS 1-1 DATE. *�Ic:k*k+k�kfkstl:�nKic*yak*tKk�ic�Icak�kak�kk*k�fF�iolaK**rk*kk*':k�k�k�k��C�It�k�k�K7K1C�k7k�Ic�icNe�*I'+h.Y:��:*�Ni.4cy INPUT _�„�---------�„--__-- - EFFLUENT CHARACTERISTICS ---y`CONTINU-0US FLUID PHASE #1 07L _- .__---- WATER PPM-Y- �--- ..___ FLOW RATE - Gl'M Z-,/R- 1h5g 10.2 TNMPLRATURE - F 50' % REDUCTION VISCOSITY - OP 1.308 89.8 9PFCIFIC; GiRAVIT'Y I.000 100% COLL - MICR 59 .------ ,.IMMISCIBLE PHASES DOLL RATE-L$5/lix PHASE *1 0IL 69.08 ____-_- ----__-,� -GAT�1tIR ID,OfS S PECI1'IC GR.A.VTTY 0.83 ----------0 0 _ '1'Fr.MI' (AEG F) 60 0 U.0 SPEC GRAV USED 0.834 CONCENrT- PPM 100 0 PARTICLk; FIST- LOG NORMAL 0.0 CoNC - PPM 100 0 0 MEAN - MICRONS 130 9T,kKDARD DI?V 2.5 0 0.00 0 0 0.00 U 0 0 0 PLATE PACK CHARACTERISTICS U0 --------�----------------__-- 0 WIDTH - FEET 1 P.0 0 0 HEIGHT - FEET 610 0 0 L,8NGTII - FEET 2.0 j 0 0 PLATE AANKs 12 j P}IASE 2 ,SOLIDS PLATES/FT HEIGHT 31 0 COLLECT AKII,A- PI t'2 13392 ' 0 0 1 0 0.000 FLUID VELOC - FYM 3.6 0 0 REYNOLDS NO. 146 j 0 OF LAM LIMIT 7 0 0 0 0 0 0 0 0 0 0 0 I () 0 I U (1 0 0 p d 1 0 0 1 TELEPHONE: 800-223-9910 TEI,EFAX: 818T272-8787 � NW POWER T5R TEL : 2063248331 Jul 15 93 8 03 No .0UZ_W_,G& 97/12/1993 12125 FROM FRCFT OUANTEK/AUTATION TO 120632493ZI P.06 Z ' t �:�t ***�xe�:a:�rn,w*�,r�r,rr-►:*1-r�r:�w+r.�rc�,��***4�e►kx�***���r*���� **+f�l:�c��Y**��k FACtT INTERNATIONAL, INC. - TULbA, OKLAHOMA "MPak" P);RFORM.A,NCE CAI QULATIONS CUST: BOEI NG—RENTON REP., JOB: APRON A, FOS 1-7 DATE: 12—Ju)-93 **�:�k**h►K���e*****+k6c*+Kz����*:K�**:kk**+K***�'��Ic%cMc�k*�Yk�:**���ak��c*t1:�k4c�kW*�rt::4:rk ` INPUT EFFLUENT CNARAC:TERISTICS --- ---___---..-___-n.., �-.........-w_r---------------- Cn1vT1ivU0i1R_k"LUYA —`_PHASE #1 UXL WATEIL PPM 1Z.G Mg�FLUW RATE GPM ,�q yk 2000 TEMPERA'Z'URE — p ::�;1,;eZrK 60 X REDUCTION 87.4 VISCOSITY — CP 1.308 SPECIFIC GRAVITY 1.000 1.00% COLL MICR 66 --_-IMMISCIBLE PHASES COWL HATE-LBS/HR 87.48 PRASE #1�^ --.....-� �____ MGAL/HR OIL 12.57 SPECIFIC GRAVITY 0.83 ----_ -- ------- __ e Tk.MP (DEG F) 80 0 0.0 SPEC .:RA%' USBD 0.834 CONCENT- PPM 100 0.0 PARTICLE DIST- LOG NORM.A.L GONC - PPM 100 0 0 MEAN - MTCRONS 130 STANDARD DFV �,� 0 0.00 0 0 0.00 0 0 0 0 PLATE YACN ChARACTNRISTICS 0 p ------------------------- 0 0 WIDTH - FEW 1210 0 0 HEIGHT - FEET g10 0 0 LENGTH - FEET 2.0 0 0 PLATE BANKS 12 PHASE 02 SOLIDS PLATES/FT HEIGHT 31 0 0 COLLECT AREA- FT2 13;492 0 0 0 0.000 FLUID VELUC - Fy1~1 4.5 0 REYr:OLDS No, 187 0 OF LAM LIMIT 9 0 p 0 0 0 0 i 0 0 U 0 0 i 0 0 0 � t 0 p 0 0 0 TELEPHONE. 800-223-9910 'TELEYAN: 918-272-8787 � NW PUWER TSH TEL :2063248331 Jul 15 93 8 : 04 No . 002 -P .96- �UE1 N � - ��- -\ Z 5 y106-C P OIL / WATER SEPARATOR 1,313 SO.FT.-EFFECTIVE COALESCING AREA 090 Q.P.M.•MAXIMUM PHOCF-SS FLOW TOP SECTION No.5105-TL-3.332P -•-� 5,520 lbs. 1!1!1!IiI!I!1- !i!T!i!• T!i!TIr!T'T. I.I tI •I'll�'I1l'111 1.Z j I r I t 1 t I•I T T T T.r•I-t TT',i-I I I-I I-- I !T!ijTli!T'TITT'T'7 T'tr' i T'T'T. �., ,T7ii1!1!1t1.I itI I .iilTThill'"i- �. T!-i!i'-lT1- I I-T t l-T!i I \ IT I.I) .TIT PT71 TjTTIj1TT-ji1 ' I tI i- I• ililII�I-il•1-i Ti ' lTi!1T'TTTTTI'TTTTTTTTT- �. _TJ7 TI T }T T T TTT• 7 T i T•I T!T1'IIl-T' �TIT!11T1TT7;T'i!.? i T'TTTT T?TT1717 ITT TT i I't 1j�'! I I -TirZl- IT TTi' 1TITITTi1�Tii�ii{1 T 1 / \ 7IM-1•T•T•TT 1 TTT•T•T T•T T 1'-4' 1111I 1+I�t1 t''i I•� it �'i1i 1t•1i1� OUTLET PIPE \ i7_TiTTTTiT�TTTTTtTT7iTT / WITH SAMPLING TEE �•TII.TI•TTII T.iT• BY OTHERS BASE,ASSEMBLY No. 5106-CPS 13,250 Ibs• FIREROLASS f,.'" ;.• .: ! 14OLD•DOWN CHANNFL OUTLET WEIR ° •{ ' OIL RETAINING BAFFLE— T• !� ' • 4'•10' I I j INl-C.t PIPE r WIT H ELDOW BY OTHERS COALESCING MEDIA INLET WEIR-� J rr * ITEMS SHOWN ARE SUBJECT TO CHANGE WITHOUT NOTICE. FOR DETAILS SEE REVERSE SIDE. Copyright 1992 125 Issue:April, 1992 NW FUWER TSR TEL : 2063248331 Jul 15 93 8 04 NO . UU2�-6fi 81/11/1993 12,21 FROM FACET QIRNTI: /001 1110H TO 11963248331 P.98 1. i ' tt.rwww.r,r.r.rm*�*�-ra�#*n►�+r,��+�****��r*�+n*xc**�*t**x��+kk:��:**x::r.��*�k�**** �k* FACET I,N'1ERNATIONAL. INC. — TULSA, OKLAHOMA "MPAk" PURFORMANCE CALCULATIONS CUST., HOEING—RENTON REFI JOB., APRON A. PUS. 9 DATE;: 12—Jul-98 +k kkhN,$..�**rKdcleK+1M lcNnlc.k****icMc+Kkie*K�k+k*�:k:kxcic�ic�;c+lIah�h**�k rioK�ic�k�k�C�x:t;lc**�k?k�:*7k�k7R�!t�K�k�* zNPUT EFFLUENT U}IA.RACTERISTICS __---— CONTLNLOUS FLUID PHASE 41 OIL WATER PPM--- -----�---4.0 FLOW RATE -- GPM 4l? 256 TEMPERATURE - F 50 !G REDUCTION 9610 VISCOSITY - CP 1.308 sQL`CI IC GRAVITY 1.000 100% COLL - MICA 37 IMMISCIBLE PHASES CULL RATE-I,BS/ktK 12.30 PHASE^ -GA,L/Hh 1.77 w1 OIL --------- SPECIFIC GRAVITY 0 0 0 ----- _- ---------0 @ TEMP (DEG F) 50 0 0.0 SPEC GRA,V USED C 04 CONCENT- PPP 100 0 0.0 PARTICLE DIST— LOG NORMAL rDNC — PPM 100 0 p MEAN - MICRONS 130 STANDARD DEV 2.6 0 0.00 0 0 0.00 0 0 0 0 PLATE PACK CHARACTERISTJCS 0 0 -----._...----------- --- 0 0 WIDTH - PEST 5.0 0 0 HEIGHT - FEET 0.0 0 0 LENGTH - FEET 2.0 0 0 PLATE BANKS 5 PI1AS 2 SOLIDS PLATES/FT HEIGHT 31 0 0 COLLECT AREA- rT-2 5680 0 0 0 0.00 FLUID VELOC - FPM 1.4 0 0 REYNOLDS NO. 57 0 % OF LAM LIMIT 3 0 0 0 0 0 U 0 U p 0 0 0 U U 0 0 0 0 0 0 0 TELEPHONE: 800-223--9910 TELEFA$: 918-272-8787 NW FUWER TSH TEL : 20b3248331 Jul 15 93 8 05 No . 002 *-rE 07/12/1993 12121 FROM FACET GUANTER/AVIA710N TO 12063240331 P. 10 ak*dealchle�k*Nsk+ktic*:k►:�kk�c�c�k�ic�ic�IcMk�kk�K+k�C*kk+k�lnicactklk�kM�7kUulc�Ialt7M�ItIk+k+k�khl:inttkkk**»:*�KY�k�K* FACET INTERNATIONAL, INC. - TULSA, OKLA.HOMA "MPak" PRRFORMANCE CALCULATIONS COST: BOEING-RENTON JOB: APRON A, PPS. 9 DATE: 1.2--Jul-93 INPUT EFFLUENT 011ARiACT>✓RrsT1GS -------------------------- ---------------------- CONTINUOUS FLUID PRASE *l OIL --------------r--.-------- ------ WATER RPM 6.4 FLOW RATE - GPM 2-YA 400 TEMPERATURE - F 00 ?i REDUCTION 93.6 VISCOSITY - CP 1.308 SPECIPiC GRAVITY 1.000 100% CULL - MICR 46 IMMISCIBLE PHASES CULL Rt1TF-LBS/I R 18.74 --.....-,...w------------.. ----- --GAL/HR 2.69 PHASE *1 OIL -------- -------- 0 0 SPECIT'IC GRAVITY 0.83 -------- ----.----- 41 TEMP (DEG Ft 60 0 0.0 SPEC GRAY USED 0.834 CONCENT- PPM IDU 0 0.0 PARTICLE DIST- LOG NORMAL l CONC - PPM 100 0 0 MEAN - MICRONS 130 STANDARD DEV 2.6 0 0.00 0 0 0.00 U 0 0 U PLATE PACK CHARACTERISTICS 0 0 -------------------------- 0 0 WIDTH - FkPT 6.0 0 0 HE1UHT FEET 6.0 U 0 LENGTH - PEET 2.0 0 0 PLATE BANKS 5 PHASE #2 SOLIDS PLATES/FT HEIGHT 31 U 0 COLLECT AREA- FTZ 6680 0 0 0 0.000 FLUID VELOC - FPM 2.2 0 U REYNOLDS NO. 90 0 % OF LAM LIMIT 4 D U 0 0 0 0 0 U () D U 0 0 0 0 0 0 U U U 0 TELEPHONE: 800-223-991.0 TbLEFAX: 918-272-8787 NLU rUuLK i Sri I LL : 2Ub3248331 Jul 15 93 8 US NO .UO2 07/12/1993 12,29 FROM FACET QUHNTEK/AVIRTION TO 12043240331 P. 12 I I x:arV::F-kk�k�:k*K7k�6csklkkY•-f:*#:K7KKIKKkMlkli:k k:k kkc7%K1K7Kk1kJc4r,�}aK1lN�*rk�k►hXilkiM7K1K�KN7k�71Jh.7k7k7K1R1k�7k�7K FACET INTERNATIONAL, INC. - TULSA, OKLAHC)MA MPrak PFR)?()RMANCE CALCULATIONS OUST,. 80ELNG-RENTON REF: JOB; APRON A, PO$. 9 DATE: 12-JuI-G3 Ii 1)1` EEFLZ?ENT CHARACTERISTICS -------------------- CONTINUOUS FLIJTD PHASE #1 OIL PPM WA'1'EFt -PPM-...-_ --------- M4X FLOW HATE - GPM 825 TEMPERATURE - F 60 % REDUCTION g7,6 VISCOSITY - CP 1.308 SPECIFIC GRAVITY 1.UU0 1009E COLL - M1UR 66 IMMISCIBLE PHASES CULL RATE-LBS/1IR 36.18 PHASE ------�01 ---- ---... CGAI,/IIR 5.19 Olt, 0 SPECIFIC GRAVITY 0.83 --------- @ TEMP (DEG F) Go 0 _^ U.0 SPEC CRAt- USED 0.834 c.OrvOENT- PPM 100 0 O.0 PARTICLE DIST- JOG NORMAL CONC; - PPM 1cr0 p 0 ( MEAN - MICRONS 130 STANDARD DEV 2.5 0 0.00 0 0 0.00 0 0 0 0 PLATE PACK CHARACTERISTICS 0 0 ------------------------ 0 0 WIDTH - FEE'I` 6.0 0 0 HEIGHT - PEET 6.0 0 0 LENGTH - FEET 2.0 0 0 PLATE HANKS 5 PHASE t2 SOLIDS PLATES/FT HEIGHT $I 0 0 COLLECT AREA- FTZ 5580 0 0 0 0.000 FLUID VELOC -- PPM 4.6 0 0 REYNOLDS NU. 185 0 X OF LAM IAMIT 9 0 0 0 0 v a U 0 0 a o a 0 0 0 0 0 0 U 0 TELEPHONE: 800-223-9910 TELEFAX; 918--272-8787 TOTP1- P. 12 BE&C P.O. Box 3707 ►,-}yDRAUL(G 5/�-%� S�P�k'� T,.�fs ENGINEERS Seattle, Washington 98124-2207 Mail Stop: PROJECT_ At /�?:�h� SMP10!✓EI�I ErJ'!"5 JOB NO. �/ FIG. BY DV►J��� CHECKED BY DATE 9-ZQ- %pZ' SHEET�OF_ Pos, s�-l-aA�7 PVS ,9-� 6-NJD Z4 Z LDS p. 57CF5 L,)SE To -----—— C Pu 1- 2--ye, 24-HP, 34-1 �Fs O, �9 cfs MAxIMv,u DCsI2aB�E Q l 5S6 C1 PM = 4-60 D C-4,461 'M R L) %t/ 2338 ivo- Y2 2 - �► 6, 1.70 c F5 - � I I Z GPI► = c OCJ GPM IID51 T o/J 'q - Lq' -7, q 0/o ;. F�.� WA Ire<< � ro PASS lov�`�i� t� . ' ('�, I Svr2Fhc[= r, 32- Hel-)D REO� 'D TO 24-K(L;- Z.67 ' SURFAcE use ! D l` ou (4—, T�-c� Vn v c.rt, p,F ,r -FL� VALUE BOX 5 o A c Tu r--� ���� C r},� i��. 1`'1�v r�T�!� ✓C f2.T G,1 j-- L�(. STop-M ag8 ' 57aaM QJr, 7r7-6L Sv2F'Ac t` - 1-7, 5?> 4- O,8,3D X-23771 REV. 5/90 - BE&Ci P.O. Box 3707 yDKr JL) C--5 s� :5e�PA-rop,5 ENGINEERS Seattle, Washington 98124-2207 Mail Stop: PROJECT /9��U tJ - M PRt)✓C M N't S JOB NO. FIG. BY -- F�/ DUIjLAP CHECKED BY DATE ��ZI��9Z SHEETS OF_ to" pipe 7a o /w q rcp-- s P; S�vPE t o'D Fog 6,M0 C'— r-2-0(4 e^jCA FU 1. H L/a D REQ'I> FO2 2• ` fZ, Z4- H 2 G—LE ✓= l7- 4-4 }0.E4--34- 0,r3 = t8,4o L=�a=-✓ A/w ScP; T?rA H-6AP 5 �'T aYPA 55 5?«L f t-J FL4w Co"J 7`e0L-1 rvL[_ OK loo-YCL f:'L-okJ ELc-v %v5t�_ �7�44+p.g3,— dKWILL ►,JoT EAcq AM To S �f�RSS QF�t-L = 4, 57 cF5 �— -Mo 24-i4L �No ;.►.,SET sro2,•� STo liJ/�T�"f� 5(J t~r~�1G-�: ;- I S��0',-+- Q�Sv+ �,!�(� r- r✓LC✓ I b,�� d �., DiA 1 57 GA X-23771 REV. 5/90