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INSTRUCTION MANUAL

1. 0 O 1 2 3 4 5 Stormceptor Model CONCLUSIONS The TSS removal results were sensitive to the selection of settling velocities for the specified particle distribution Differences in TSS removal of up to 40 were obtained depending on the settling velocities that were evaluated Results were also affected by the TSS loading method The use of an EMC underestimated TSS removal performance by approximately 15 when compared to the use of the build up and wash off equations This difference is expected since the EMC method increases the load that is by passed and provides higher loads during higher treated flow rates when the detention time and hence settling effectiveness of the unit is reduced The model indicates that high percentages of the annual runoff can be treated with low flow treatment devices such as the Stormceptor The model also predicts that the TSS removal performance is less sensitive to the size of separator than that observed from previous field studies STORMCEPTOR B 15 17 S Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormceoior Appendix B Regional hydrology affected the TSS removal estimates provided by the model Although differences of up to 20 were observed significant hydrological differences between the sites were needed to obtain this variance Most of the rainfall station locations tested provided TSS removal estimates similar to those of Toronto w
2. Stormceptor Sizing Program v 4 0 0 Observed vs Simulated g Observed w Simulated TSS Removal Edmonton Toronto St Paul Boston Seatac Test Sites Figure 2 1 Calibration Between Simulated and Field Monitoring Results The Sizing Program is based on continuous hydrological simulation of hydrology mixing models and total suspended solids TSS settling The sizing methodology can be described in three processes e Determination of flows from geographic historical continuous rainfall data e Build up and Wash off of TSS from impervious land areas and e TSS transport through the Stormceptor settling mixing by pass The use of a calibrated model is the preferred method for sizing stormwater quality structures for the following reasons STORMCEPTOR 7 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior e the hydrology of the local area is properly incorporated in the design distribution of flows back to back storms inter event times rainfall intensity frequency of large storms the distribution of TSS with the hydrology is properly considered in the design particle size distribution is properly considered in the design the design can be optimized for TSS removal and the cost benefit of alternate TSS removal criteria can be easily assessed Section 6 0 provides a detailed description the Sizing Program as well as the
3. Recognizing the small time of concentration that would typically be encountered in most Stormceptor applications fifteen minute data were utilized whenever possible For hourly data the entire hour s rainfall is assumed to fall in the first 15 minutes of the hour a conservative approach A comparison of intensities with nearby 15 minute rainfall stations indicated that the average rainfall intensity for the hourly simulations was doubled that of the 15 minute simulations The model uses a 5 minute time step at all times regardless of the rainfall time step in order to accommodate sites with a short time of concentration The fifteen minute rainfall or hourly rainfall that is assumed to occur over fifteen minutes is equally apportioned over each five minute period of the 15 minute interval STORMCEPTOR 36 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 6 6 Hydraulic Conditions Hydraulic lab testing has been used to confirm the hydraulics of the Stormceptor System Results of the lab testing have been used to physically design the Stormceptor System and the sewer pipes entering and leaving the unit Key physical parameters of the unit that must be maintained are as follows e The inlet pipe size and slope must be properly selected to ensure the following o The depth of flow at the treated flow rate is 200 mm or less o The velocity of the treated flow rate is equal to or less than 1 0 m
4. 19 Instruction Manual UL Stormceptor CD Sizing Program Version 4 0 0 Stormoceptor J Rainfall Stations Available Rainfall Stations State Prov Lat deg Long deg Ontaria 100 TORONTO CENTRAL 18 100 W 45 30 W 90 30 15 Search for Stations by State Prov Selected Rainfall Station lt Selected Location TORONTO CENTRAL Add Station Modify Station Selected State Prov ONTARIO Delete Station Create Lookup T able Done Should you need to add modify or delete a rainfall station extreme care should be taken when going through these procedures The following subsections provides instructions for adding modifying or deleting a rainfall station as well as creating a lookup table which one can quickly use to look up appropriate unit models under our default conditions 5 1 1 Add a Station To add a rainfall station follow the steps outlined below Step 1 Note that this step is done outside the Sizing Program Create or obtain a National Climate Data Center NCDC rainfall data file and save it to c program files Stormceptor rainfall or the appropriate rainfall directory for which the Sizing Program references Section 5 1 1 1 provides an explanation of the NCDC file format and what it translates to Only 15 minute and 60 minute rainfall data may be used in the program Step 2 Start the Stormceptor CD Sizing Program and click the Rainfall button Step 3 Click the Add Station button on the Rainfall Stati
5. lu Stormcepior Stormwater Oil amp Sediment Separator Australia Patent No Australia Patent No Australia Patent No Canadian Patent No Canadian Patent No Canadian Patent No Canadian Patent No Canadian Patent No Canadian Patent No China European Patent Treaty New Zealand Patent No New Zealand Patent No U S A Patent No U S A Patent No U S A Patent No U S A Patent No U S A Patent No U S A Patent No U S A Patent No g s atents 693 133 707 133 729 096 2 009 208 2 137 942 2 175 277 2 180 305 2 180 383 2 206 338 ZL 97 1 13074 4 96 307 996 9 4 985 148 314 626 4 985 148 5 498 331 5 725 760 5 723 115 5 849 181 6 068 765 6 371 690 INSTRUCTION MANUAL Stormceptor CD Sizing Program VERSION 4 0 0 Copyright Stormceptor 2003 Prepared by The Stormceptor Group of Companies November 2003 TABLE OF CONTENTS TABLE OF CONTENTS mic ce cotat tec tera aaa c odaia anu alis a da ia fa il rau eet II LIST OF APPENDICES sii oaia cee Diva aa ru EE EE lil LIST OF FIGURES EE III DIST OR TABLES i acest ec ected cbs dia EEA A ue EE iai lect dai tub cai aaa dat tees lil 1 0 GENE Fr AL BEE 4 Vet INTRODUC FIONA AE 4 1 2 NEW EEATUREE sus EE 4 19 D E E e EE EE 4 TA VAUBAN 5 2 0 STORMCEPTOR CD SIZING PROGRAM 7 2A GENERAL Ree 7 ERR LE Le EEN 8 2 93 MINIMUM SPECIFICATIONS n ciori a a a nur ba gaini ai n Ba 9 3 0 INSTALLING amp UNINSTALLING cc eee
6. 37 53 34 50 30 43 27 41 STORMCEPTOR B 13 17 65 65 66 63 61 60 59 59 58 57 57 59 54 51 44 42 11 11 11 69 67 66 66 65 64 64 64 65 61 99 52 49 AS Stormcepior 16 16 16 14 13 12 12 11 11 11 10 11 67 65 99 57 1800 3600 6000 7200 19 19 18 11 19 19 16 14 14 14 74 14 10 69 64 61 eS Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B Figure 5 Regional TSS Removal Performance 2ha 90 80 Se Colorado SS e O gd gt 2 60 50 27 ei de ETA 2 40 Z Saas 3 30 c lt 20 10 0 300 450 750 900 1500 1800 3000 3600 5000 6000 6000 7200 Stormceptor Size Although the majority of stations provided similar TSS removal estimates there were areas with significant differences The performance estimates were lowest for the southeastern United States This area is well Know for it s intense seasonal rainfall distribution Figure 5 indicates that the TSS removal rates may vary up to 20 under different hydrological conditions on the same land use site conditions The use of local or regional rainfall data is therefore appropriate for design purposes Rainfall Timestep An analysis was conducted to determine the sensitivity of the model to changes in the rai
7. 10 NOTICE Notices under this agreement shall be deemed given and received 1 in the case of personal delivery when delivered 2 in the case of facsimile or electronic means including e mail on the next business day and 3 in the case of prepaid registered mail five 5 days after having been sent by mail All notices to US will be sent to Stormceptor Canada Inc Attention President 12 Madison Avenue Toronto Ontario M5R 2S1 All notices to You will be sent to Your physical or electronic address noted in the registration form above Section 11 U S Government restricted rights For United States Department of Defense contracts the Software Product is commercial computer software and the United States Government shall have only the rights specified in this Agreement in accordance with 48 CFR 227 720 3 a If acquired by or on behalf of a civilian agency the Software Product is licensed subject to RESTRICTED RIGHTS and use duplication or disclosure by the United States Government or any person or entity acting on its behalf is subject to restrictions as set forth in paragraphs c 1 and 2 of the Commercial Computer Software Restricted Rights clause in FAR 48 CFR 52 227 19 Section 12 Export restrictions You shall comply with any laws which may impact Your right to export import or use the Software Product including without limitation United States and Canadian export laws You shall not use the Software Product f
8. 379 118933 99 7 ows and it is not 12256 118610 324 118933 99 7 economical to build a 0 289 118661 272 116933 99 8 larger structure in 0 324 118696 SS 118933 99 8 order to capture a 0 361 118730 204 118933 99 8 small additional 0 400 118765 169 118933 99 9 amount of the runoff 0 441 118802 coe 118933 99 9 0 484 118840 93 118933 99 9 0 529 118881 53 118933 100 0 0 576 118917 0 118933 100 0 End of Simulation STORMCEPTOR C 4 4
9. EMC m Build up Wash off a Existing Sizing 50 40 30 20 Annual TSS Removal 10 0 6 00 8 00 10 00 12 00 14 00 16 00 Stormceptor Storage m3 ha Selection of Settling Velocities A comparison was made regarding the choice of settling velocities using Toronto rainfall data and the build up wash off TSS generation methodology Figure 3 provides the results of this analysis The TSS removal estimates using the USEPA settling velocities are an average of 20 lower than the original TSS removal estimates 29 lower than the estimates using the SG 1 3 velocities and 39 lower than the estimates using the STORMCEPTOR B 10 17 we Instruction Manual E Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B SG 2 65 velocities These results indicate that the TSS removal performance results are very sensitive to the selection of settling velocities Annual Flow Treatment Numerous regulatory agencies design stormwater quality measures using a design event The design event used generally ranges from the 25 mm storm or annual storm to the 25 year storm The modified SWMM program was used to calculate the percentage of annual runoff that would be treated not by passed with different by pass flow rates This analysis was conducted using the Toronto rainfall for a drainage area of 2 25 ha Figure 4 shows that the volume of runoff that is treated prior to by pass quic
10. Modify a Station Modify Station To modify a rainfall station first select the rainfall station you want to change from the displayed list and then click on the Modify button The following window should appear w Add Edit Rainfall Station State Province A egion Ontario DEEN EIER OM Station ID 1 DID Location TORONTO CENTRAL Beginning ear H J52 Ending Year 1 199 Elevation 39 9744 Latitude N 45 30 e Longitude W Er 30 Temporal Resolution min 1 a Done O To edit the identification and geographical information available for the rainfall data set go to the respective cells and edit the information The interpretation of each item is as follows e State Province Region Type in the complete name of the state province or region applicable to the rainfall station you are adding e Abbreviation Type in the abbreviation for the state province or region e Station ID enter the ID for the rain gage This should be provided by the NCDC source e Location enter the location of the rain gage This should be provided by the NCDC source e Beginning Year enter the year in which the first rainfall event occurred This should be provided by the NCDC source e Ending Year enter the year in which the last rainfall event occurred This should be provided by the NCDC source e Elevation enter the elevation of the site Make sure the number entered is consistent with the units selected e Latitude enter t
11. aaa aa mana nana nana nana nana na nau 10 3 1 INSTALLING THE SIZING PROGRAM eee eee ea eee aa aaa 10 3 2 UNINSTALLING THE SIZING PROGRAM ccccceccececceccccecccceccccecuccecucaececauaecucacaucaeaeceuaesass 11 4 0 USER INTERFACE OVERVIEW seent ek EEN EN KEN KEEN EEN E KEEN KN EEN NEEN KEEN KEEN EEN EEN 12 A MAINMENU BAR ocs otet i abat Da Gandul ba aaa at ta Ee age 13 4 2 STANDARD TOOLBAR nn ante aaa tea cat ae lata ina ada ala ua aia ala n a i alt atu ba a 14 4 3 PROJECT PARAMETERS EE 16 5 0 SIZING A STORMCEPTOR UNIT EE 19 S SELECTA RAINEALL STATION cesare EE e 19 SLi AGOA ION EE EE 20 5 1 1 1 NCDC Hourly and 15 Minute Precipitation Files ccceeeeeeeeeeees 21 5 1 1 2 Rainfall Data 15 minute time steps eee eee 22 5 1 1 3 Rainfall Data 60 minute time steps mmc eee 22 Ee e E ee EE 23 5 19 Delete SIA ON EE 24 5 14 Create LOOKUP Table ss ee a a eee ae a 24 52 FLOW CONTROL OPTIONAL acnee opta e et ata het iudaice Dl ti aa ees 25 5 2 1 Alternative 1 Storage Flow Control 25 5 2 2 Alternative 2 Upstream Flow Splitter cccccccccssseeescccsseeeeecssaseesecssaansees 26 Do IE PARANA ERE uneia oara eu aort ata o ao a asec a a aa at eres eee Ma 27 54 PARTICLE SIZE DISTRIBUTION PSD WEE 27 5 4 1 Fine Particle Distribution eee eee eee aa eee 28 5 4 2 Coarse Particle Distribution 0 ccccccccccccccecccceccecsccscecessccessensecenstaensccssecesess 28 543 S
12. distribution Particle size distributions outside of the default will result in different TSS removal efficiencies for the Stormceptor system It is recommended where possible that the actual particle size distribution for sites be measured prior to sizing The Stormceptor representatives have the ability to modify PSD up to 20 particle sizes The default PSD given in Table 5 1 Fine Particle Size Distribution is commonly accepted by most regulatory agencies in North America The specific gravity of the smaller particles is less than a standard mineral value of 2 65 to account for non ideal settling characteristics and the influence of organic material There is no absolute right PSD or specific gravity and the user is cautioned to review the site location characteristics material handling practices and regulatory requirements when selecting a PSD Refer to Section 5 4 for a discussion on three options for PSD 6 5 Local Historical Rainfall Data Stormceptor sizing is based on a long term continuous hydrologic water quality computer simulation using ocal historical rainfall data to estimate total suspended solids removal Fifteen minute or hourly rainfall data were obtained for the entire USA from Earthinfo on CD ROM Stations were selected based on location period of record data resolution and completeness within the period of record The rainfall data was converted into National Climatic Data Center NCDC format for input to SWMM
13. in the tank and in the discharge from the tank each timestep Equation 7 assumes the suspended solids are completely mixed within the tank volume During periods without flow inter event periods the solids are not assumed completely mixed at the beginning of each timestep and the depth of suspended solids in the separator decreases each timestep until all of the solids are removed or there are subsequent flows into the separator The concentration of solids in the tank during periods without flow was calculated using equation 8 C C 1 Vet D 8 Where C solids concentration in the tank kg m C initial solids concentration in the tank at the beginning of the timestep kg m STORMCEPTOR B 5 17 A Instruction Manual w Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B V settling velocity m s t timestep s D depth of solids in the separator m The depth of solids D in the separator in Equation 8 decreases each timestep based on the settling velocity until all of the solids are removed or there are subsequent inflows to the tank The model can be used with either hourly or 15 minute rainfall data Fifteen minute data is preferred recognizing that the Stormceptor is only applicable for small drainage areas Small drainage areas have short times of concentration and require data with a suitable timestep Internally the model performs calculations with a 5 minute timestep The choice o
14. mathematical model used 2 2 Limitations This program is designed to accommodate the needs of most of the common urban applications where the Stormceptor could be used There are certain applications where this program should not be used in the design of a Stormceptor including but may not be limited to the following 1 Sites that exhibit unstable wash off characteristics such as gravel surfaces construction sites and sites with material storage see Section 6 2 for the definition of unstable sites 2 Sites with a typical suspended solids characteristics such as coal manufacturing facilities cement manufacturers sites with a particle size finer or coarser than that specified in the Sizing Program as presented in Section 5 4 3 Sites with altered post development annual hydrology Alterations to the annual hydrology result from the implementation of stormwater controls upstream of the proposed Stormceptor Infiltration or detention control of small storms lt 1 year result in alterations to the annual hydrology Sites with flood control 2 to 100 year detention facilities will not significantly alter the annual hydrology since detention occurs infrequently Upstream flood control facilities do not preclude the use of this program for water quality design and 4 Predictions of annual runoff treatment and TSS removal for lookup tables were calculated for up to 20 impervious acres The program will indicate a drainage area
15. of results using an event mean concentration loading and build up wash off loading given the default particle size distribution and settling velocities based on a specific gravity of 1 8 STORMCEPTOR B 9 17 Instruction Manual AS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B The results in Figure 2 show that the TSS removal rates using the EMC approach are lower by 14 when compared to the build up wash off method even though the total loads are similar This is expected due to the by pass nature of the Stormceptor The estimated TSS removals for the existing sizing guidelines which are based on an early field study are lower than both the EMC and build up wash off estimates for low values 50 TSS removal of separator storage drainage area and are higher than the other estimates for larger values of separator storage drainage area 80 TSS removal The range of TSS removal values based on computer modeling is smaller than the empirical TSS removal rates Doubling the size of unit for the same area results in an increase of 30 for TSS removal based on the current sizing guidelines whereas the increase in performance based on the modeling is less dramatic a 5 to 10 increase in TSS performance This finding indicates that the modeling results will be less sensitive to changes in the model size for any given drainage area Figure 2 TSS Removal vs Loading Methodologies 90 80 10 60
16. person arising out of or in connection with any use of or reliance on the Sizing Program or Data The Sizing Program user waives any right to claim loss or damage against Stormceptor or any of its respective agents or employees arising out of or in connection with any use or reliance by the Sizing Program user or its representatives or any other person on the Sizing Program or Data and Use of the Sizing Program will constitute an acceptance of these Conditions of Use Manual Overview The following is a Summary of topics presented in this manual Section 1 0 This section provides an introduction to the instruction manual a Summary of new features of the Sizing Program a disclaimer for users of the software and an overview of the instruction manual Section 2 0 This section provides a general description about the Stormceptor CD Sizing Program limitations and minimum specifications for installation of the Sizing Program Section 3 0 This section provides installation and removal instructions for the Sizing Program Section 4 0 This section describes the user interface features including main menu bar the standard toolbar and project parameters Section 5 0 This section runs though the steps for sizing a Stormceptor unit These steps include 1 Select a Rainfall Station 2 Input Upstream Quantity Flow Control Optional 3 Input Site Parameters 4 Choose the particle size 5 Click Simulate and 6 Interp
17. velocities may underestimate actual TSS removal rates Settling velocities based on a specific gravity of 1 8 were chosen in this study as the default or benchmark selection The solids loading was segmented into the particle size distribution and the concentration of solids in each particle size was tracked individually during the settling calculations Meteorological Data Rainfall from the City of Toronto 5 minute timestep 0 25 mm resolution 10 years record 1987 1996 was agglomerated into 15 minute data for use with the model Fifteen minute data were obtained for the entire USA from EarthInfo on CD ROM Stations were selected based on location period of record data resolution and completeness within the period of record Data was also obtained from CSR Humes for various stations throughout Australia The rainfall data was converted into NCDC format for input to SWMM Fifteen minute data were utilized recognizing the small time of concentration that would typically be encountered in most Stormceptor applications Simulations were also conducted using hourly data to determine the sensitivity of the results to the precipitation timestep Numerous hourly stations were available on the EarthInfo CD for this purpose The model uses a 5 minute timestep at all times regardless of the rainfall timestep STORMCEPTOR B 8 17 S Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormceoior Appendix B Modeling Para
18. 6 91 08 94 06 91 25 94 06 91 58 97 07 93 56 97 07 94 06 98 63 19 1 8 83 87 85 62 93 62 90 77 93 62 90 93 93 62 91 26 96 83 93 3 96 83 93 82 98 55 20 1 9 83 19 85 21 93 2 90 46 93 2 90 62 93 2 90 95 96 59 93 05 96 59 93 57 98 45 21 2 82 56 84 8 92 79 90 15 92 79 90 31 92 79 90 65 96 38 92 8 96 38 93 33 98 34 22 2 2 81 38 84 15 91 99 89 64 91 99 89 8 91 99 90 14 95 96 92 38 95 96 92 92 98 11 23 2 4 80 11 8 91 22 89 23 91 22 89 39 91 22 89 72 95 55 92 02 95 55 92 57 97 88 24 2 6 78 97 82 94 90 53 88 72 90 53 88 88 90 53 89 2 95 13 91 59 95 13 92 15 97 62 25 2 8 77 97 82 32 89 85 88 24 89 85 88 4 89 85 88 72 94 71 91 18 94 71 91 75 97 35 26 3 77 06 81 85 89 22 87 86 89 22 88 02 89 22 88 34 94 27 90 85 94 27 91 43 97 09 27 3 2 76 2 81 32 88 64 87 45 88 64 87 61 88 64 87 93 93 84 90 49 93 84 91 08 96 83 28 3 4 75 36 80 9 88 05 87 12 88 05 87 28 88 05 87 59 93 41 90 2 93 41 90 79 96 59 29 3 6 74 47 80 35 87 49 86 71 87 49 86 87 87 49 87 18 93 89 84 93 90 45 96 37 H SE pis Aia SN Column A Area The impervious drainage area in Acres from 0 1 Acres to 20 Acres Column B Estimated annual flow capture in based on the area in Column A for a U S Stormceptor Model STC 450 Column C Estimated annual TSS removal in based on the area in Column A for a U S Stormceptor Model STC 450 Column D to As per column B and C however for U S Stormceptor models STC 900 Column Y to STC 16000 STORMCEPTOR A 1 1 we Instruction Manual meal 3 Stormc
19. D Coarse PSD Particle um IS Specific Gravity 60 oT 200 20 265 1 The TSS removal performance will vary depending on the actual influent TSS particle size distribution 2 The STC 6000 and 14000 are only available in Eastern Canada Southern Ontario Quebec and the Maritimes STORMCEPTOR 16 Instruction Manual UL Stormceptor CD Sizing Program Version 4 0 0 Stormceptor Rainfall Flow Control User s Manual Project Details Selected Rainfall Station Site Parameters Years Upstream Storage Fine PSD Opens the rainfall station selection window Users can choose the location that is closest to the site if the exact site location is not listed Refer to Section 5 1 for more details Opens flow control window which allows you to incorporate flow control that is or will be at the site of interest Refer to Section 5 2 for more details Opens the user manual The user manual is in a portable document format PDF A PDF reader is required to view the manual Please note that no PDF reader is bundled with the software package Software may be downloaded online through PDF software developer websites This is where the user can input project details including project name project number location company name contact person and date This presents the rainfall station location that has been selected for the analysis If this area is blank the user has not selected a rain
20. MCEPTOR B 6 17 AS Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B Where Vs settling velocity for particle diameter d m s g gravity m s ps density of particles kg m pw density of water kg m d particle diameter m u viscosity of water kg ms Nr Vsdpw u Where Nr Reynolds number Vs settling velocity for particle diameter d m s pw density of water kg m d particle diameter m u viscosity of water kg ms If the Reynolds number is greater than 0 3 drag on the particles reduces the settling velocity An iterative solution was used solving for the Reynolds number drag coefficient and settling velocity until changes in the settling velocity were insignificant for particle sizes with the Reynolds numbers The drag coefficient is given by equation 11 and the settling velocity is calculated by equation 12 Cp 24 Npkg 3 NR0 5 0 34 Where Cp drag coefficient Nr Reynolds number Vs 49 Ps Pw d 3Cppw Where Vs settling velocity for particle diameter d m s g gravity m s ps density of particles kg m pw density of water kg m d particle diameter m Cp drag coefficient Table 2 provides a comparison of the settling velocities used in this study Table 2 Discrete Particle Size Settling Velocities mm s eee 9 G 1 3 S G 1 8 S G 2 65 USEPA 1983 SC calculated calculated calculated
21. Y NC United States MP OH OK OR PW PA PR RI SC SD TN TX VT VI VA WA WV WI 1 800 909 7763 1 800 285 9190 Carder Concrete Products Company ID MT ND UT WY 1 800 220 9190 Stormceptor Head Office Stormceptor Group of Companies 12 Madison Avenue Toronto ON M5R 2S1 Tel 1 800 565 4801 STORMCEPTOR 38 Instruction Manual UL Stormceptor CD Sizing Program Version 4 0 0 Stormceoior 8 0 SOFTWARE LICENSE TERMS AND CONDITIONS IMPORTANT READ CAREFULLY To use the Software Product You must agree to the following terms and conditions If You use the program You are entering into a binding agreement containing all of the terms and conditions below We recommend that You print or download a copy of the terms and conditions for your records if You accept the agreement If You do not agree to the following terms and conditions You must return the Software to Us In this agreement We Us and Our means Stormceptor Canada Inc and You and Your means the individual or entity that is using the program RECITALS A B We have developed pollution control devices called the Stormceptor System The Stormceptor System is available in different sizes and materials We have developed and are entitled to license to others including You a software product called Stormceptor Expert System Version 4 0 0 which includes computer softw
22. a should be divided by the anticipated number of Stormceptor units required Determining the number of Stormceptor units required may only be solved through trial and error 5 4 Particle Size Distribution PSD The user is required to choose either the coarse or the fine distribution by clicking either the Coarse PSD or Fine PSD button The fine particle distribution is the default distribution and recommended particle distribution to be used However should you know the specific PSD particular to the sediment at the site then those values are recommended to use for sizing of the Stormceptor unit Please contact your local Stormceptor Representative for assistance in sizing The following subsection explains the options to particle size selection including fine particle distribution coarse particle distribution and site specific particle distribution For more information on how PSD affects accuracies in sizing a Stormceptor unit refer to Appendix B STORMCEPTOR 2 Instruction Manual U Stormceptor CD Sizing Program Version 4 0 0 Stormceoior 5 4 1 Fine Particle Distribution The default PSD for the Sizing Program is the fine particle distribution as presented in Table 5 1 below The default PSD is commonly accepted by most regulatory agencies in North America The specific gravity of the smaller particles is less than a standard mineral value of 2 65 since the smaller particles tend to consist of lighter organic mate
23. anges in hydrology although significant changes in hydrology did impact TSS removal estimates KEYWORDS Stormwater suspended solids model hydrology Stormceptor separator INTRODUCTION The Stormceptor is a water quality separator designed to remove oil and sediment from stormwater A key feature of the design is an internal high flow by pass to prevent scouring and re suspension of previously trapped pollutants Since the separator is based on treating the everyday storm the effectiveness of the separator is dependent on the distribution of pollution in stormwater and the frequency and magnitude of stormwater flows throughout the year In 1995 sizing guidelines were derived for the Stormceptor based on field monitoring of sludge accumulation over time in Toronto Ontario Canada The accumulation data was used to derive estimates of annual total suspended solids TSS removal Two key assumptions were made in the 1995 analysis to estimate TSS removal a TSS loading rate of 185 mg l United States Environmental Protection Agency USEPA Nationwide STORMCEPTOR B 1 17 Instruction Manual w Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B Urban Runoff Program NURP median 1983 and a sludge water content 75 water Actual Toronto rainfall data combined with the NURP TSS concentrations provided estimates of annual TSS loading Figure 1 shows the performance relationship derived from the Toronto monitor
24. any further breach of such provision but such action shall not be construed so as to be in derogation of any other remedy which We may have in the event of such a breach Section 9 TERMINATION 1 This agreement is effective from the date on which You click on the ACCEPT button until terminated You may terminate this agreement at any time by destroying all copies of the Software Product We may terminate this agreement at any time a for breach of this Agreement immediately on notice to you or b without cause on thirty 30 days notice to You Such termination by Us shall be STORMCEPTOR 41 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior in addition to and without prejudice to such rights and remedies as may be available to Us including injunction and other equitable remedies Upon receipt by You of written notice of termination from Us or termination by You You shall immediately a cease using the Software Product b return to Us all copies of the Software Product or destroy all copies thereof in Your possession and all materials containing any portion of the Confidential Information and c within ten 10 days thereafter provide to Us in such form as is satisfactory to Us a sworn statement confirming that You have complied with the foregoing 2 The provisions of Sections 3 4 5 6 7 8 9 10 11 12 and 13 herein shall survive the termination of this agreement Section
25. are and may include related printed or electronic documentation the Software Product The Software Product can help You determine which Stormceptor System best suits You You wish to use the Software Product and We have agreed to license such use pursuant to the terms of this agreement FOR VALUE RECEIVED and good and valuable consideration the parties agree as follows Section 1 PERMITTED USE 1 Subject to the terms of this agreement We hereby grant to You a personal revocable non transferable and non exclusive licence to use the Software Product and any software bundled with the Software Product solely in executable code format and solely for Your own internal Business Purpose In this agreement Business Purpose means the purpose of determining which Stormceptor System best suits You Your right to use the Software Product and any software bundled with the Software Product is limited to those rights expressly set out herein This Agreement grants a license only under the Software Product and any software bundled with the Software Product and not to or under any other intellectual property of Ours including any patents trademarks copyrights trade secrets or other software section 2 RESTRICTIONS ON USE STORMCEPTOR 39 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior You shall 1 not use the Software Product to evaluate the products of any competito
26. ations Stable sites are areas with ground conditions that are not susceptible to erosion during rainfall events Stable land surfaces include vegetated pervious areas asphalt or concrete surfaces and roof tops Stable sites have a limited build up of sediment Unstable sites do not emulate the same build up and wash off characteristics as do stable surfaces Unstable sites have near unlimited build up and wash off during a rainfall event Examples of unstable site conditions include gravel parking areas dirt surfaces construction activity and sites with exposed sand or salt piles The standard version of the Sizing Program does not model the performance of the Stormceptor System to unstable sites Please contact your local Stormceptor Representative for sizing assistance for unstable sites STORMCEPTOR 35 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 6 3 Site Area and Imperviousness The size of the site area and percent imperviousness also determines the removal efficiency of the Stormceptor system The Stormceptor unit size is dependent on these two input parameters 6 4 Particle Size Distribution The most sensitive parameter to the sizing of the Stormceptor System using the Sizing Program is the selection of the design particle size Default values for particle size assume a PSD of 20 microns to 2000 microns USEPA NURP 1983 Refer to Table 5 1 for the default particle size
27. ceptor models from 0 1 impervious hectares to 5 0 impervious hectares Imperial from 0 1 acre to 20 acres See Appendix A for a sample lookup table Once the simulation is complete the Sizing Program will automatically save to the Stormceptor root directory in which the program was installed Installation of the program is defaulted c Program Files Stormceptor Within the directory search for the table by state and ID number The file will have an tbl extension The file may be viewed in a spreadsheet program or a text editor program 5 2 Flow Control optional There are two alternatives to flow control 1 Quantity Control Storage and 2 Upstream Flow Splitter controlling the flow Quantity Control Storage may consist of adding a flow reducer upstream of the Stormceptor or other devices that would restrict the flow to achieve a certain rate of flow Upstream flow splitting may consist of diverting an amount of flow from entering the Stormceptor unit downstream thereby controlling the maximum flow to be treated by the Stormceptor unit In this the user would have to enter the maximum flow that would enter the Stormceptor It is rare that this occurs but we have incorporated this function for users to consider should the site of interest have this feature The following two subsections described the above noted alternatives 5 2 1 Alternative 1 Storage Flow Control If there is flow control on site as part of the de
28. e a rainfall file Are you sure you want to proceed e If you are sure you want to delete it press the Yes button otherwise press the No button Doing this will perform the requested function 5 1 4 Create Lookup Table The purpose of the lookup table is to provide the user with a summary table listing the performance of all Stormceptor units by varying increments of area from 0 1 acres to 20 acres and based on a specific rainfall gauge The lookup table may be used as quick reference for sizing To create a lookup table for a rainfall station select the rainfall _ Create Lookup Table data from the displayed list and click on the Create Lookup Table button Doing this will generate the following screen to display the status of the simulation as the program steps through data for each year Note that this may take a few minutes depending on the number of years of data to be processed Hydrology amp T55 Simulation Calculating Hydrology and TSS Removal Calibrating T55 EME IMPORTANT Note Prior to creating a lookup table ensure that you have saved all work that is open The process depending on the size of the rainfall data sets may take some time to complete and may use additional resources on a computer system STORMCEPTOR 24 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior The Stormceptor CD Sizing Program generates a table listing the performance of all the Storm
29. eam flow splitting may consist of diverting an amount of flow from entering the Stormceptor unit downstream As such one pipe would convey a certain maximum flow away from the Stormceptor and the other pipe would direct a certain amount of flow to the unit As a result a certain maximum flow would enter the Stormceptor This maximum flow would be entered by the user By selecting the box beside External Upstream Flow By Pass the following cell would appear to allow the user to enter the maximum flow that would be directed to the Stormceptor unit STORMCEPTOR 26 Instruction Manual 3 Stormceptor CD Sizing Program Version 4 0 0 Stormcevtor ig Upstream Quantity St A Control Quantihy Control Storage Humber of Storage Points 1 Delete Highlighted Row Inzert Row Before Highlight Insert Row After Highlight Sort Storage Table Upstream Flow Splitter Max Flow to Stormeeptor cms Clear Done When you have entered the maximum flow rate click on the Done button to accept the input and to exit the window 5 3 Site Parameters Under the heading Site Parameters the user is to input the size of the drainage area and the percentage of imperviousness Note that the values should reflect the selected site for analysis Note The Stormceptor Sizing program only provides estimates for one Stormceptor unit on the site In order to model multiple Stormceptor units for a site the drainage are
30. ecorded during a rainfall event in 0 25 mm resolution 0 1 inches The number of tips per rain gauge time step is then used by the program to model the hydrology of each site Only 15 minute and 60 minute rainfall data may be used in the program Example All rainfall files are named as in the following example for Boston Logan International Airport ID 770 STORMCEPTOR 21 U Instruction Manual e Stormceptor CD Sizing Program Version 4 0 0 Stormcepior File name MA77O ndc Abbreviation of the station ID A rain gauge File iati province or state 2 characters Note Abbreviation and Station ID of the file name must match what is inputted in Section 5 1 1 for Abbreviation and Station ID Sample NCDC file are shown below Depending on the amount of data available there may be over 100 000 recorded rainfall tips in a data set In order to create rainfall data for use in the program they must follow the NCDC format below 5 1 1 2 Rainfall Data 15 minute time steps The following is a brief interpretation of an NCDC file format for rainfall data taken at 15 minute time steps An example of this format is as follows Sample 15 minute NCDC file format 15M19210702QPCPHI19840600180041430000001 1445000001 2400000003 2500000005 15M192107020PCPHI19840600190040015000002 0030000002 0045000002 2500000006 L5M19210702Q0PCPHIL98406002300 71800000004 815000002 2100000007 2115000011 2130000011 2145000011 2500000046 The interpr
31. elow shows the file as viewed in a common spreadsheet program Please note that the table is unformatted and unlabelled A brief explanations of the columns are listed below U S Stormceptor Model Numbers E pr 98 8 B S 3 0 2 98 98 95 75 100 97 75 100 97 85 100 98 100 98 57 100 98 75 100 4 0 3 98 29 94 4 99 57 96 93 99 57 97 05 99 57 97 23 100 98 01 100 98 24 100 5 0 4 97 33 93 5 99 16 96 38 99 16 96 49 99 16 96 7 99 89 97 62 99 89 97 88 100 6 0 5 96 13 92 93 98 83 96 98 83 96 13 98 83 96 36 99 58 97 35 99 58 97 64 100 7 0 6 95 05 92 15 98 57 95 5 98 57 95 64 98 57 95 9 99 32 96 98 99 32 97 31 100 8 0 7 93 91 91 45 98 25 95 05 98 25 95 19 98 25 95 46 99 11 96 64 99 11 96 99 99 84 9 0 8 92 75 90 65 97 88 94 52 97 88 94 67 97 88 94 95 98 91 96 26 98 91 96 63 99 65 10 0 9 91 58 89 98 97 46 94 07 97 46 94 22 97 46 94 5 98 75 95 92 98 75 96 31 99 5 11 1 90 49 89 36 96 98 93 56 96 98 93 72 96 98 94 03 98 61 95 54 98 61 95 96 99 34 12 1 1 89 5 88 75 96 53 93 13 96 53 93 29 96 53 93 61 98 45 95 21 98 45 95 65 99 21 13 1 2 88 57 88 24 96 12 92 75 96 12 92 91 H 96 12 93 24 98 25 94 91 98 25 95 36 99 11 14 A3 87 72 87 68 95 72 92 35 95 72 92 51 95 72 92 84 98 04 94 59 98 04 95 06 98 99 15 1 4 86 86 87 18 95 32 91 98 95 32 92 14 95 32 92 48 97 82 94 3 97 82 94 78 98 89 16 1 5 86 08 86 77 94 91 91 66 94 91 91 83 94 91 92 16 97 59 94 04 97 59 94 53 98 8 17 1 6 85 37 86 42 94 48 91 38 94 48 91 54 94 48 91 87 97 33 93 8 97 33 94 3 98 71 18 1 7 84 61 86 04 94 0
32. empirical 0 00254 soe S G Specific Gravity STORMCEPTOR B 7 17 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B The settling velocities based on the empirical USEPA data are 65 to 150 times smaller than the settling velocities based on a specific gravity of 2 65 A specific gravity of 2 65 is commonly associated with sand size particles whereas the fines in stormwater are commonly associated with a lower specific gravity The use of a higher specific gravity may be justified however if the values are considered representative of the settling velocities of fines in a flocculated or coagulated state Research indicates that there is a high potential for coagulation amongst particles Ball and Abustan 1995 which will increase settling velocities and TSS removal rates Furthermore historical settling velocity calculations have been based on discrete particle methodologies vertical settling column tests that do not account for potential coagulation Coagulation would effectively offset the settling velocity columns in Table 2 i e discrete settling velocity for 60 um represents coagulated 20 um particle size Numerous field tests on the Stormceptor Labatiuk 1996 Ontario MOE 1999 Bryant 1995 have indicated a high percentage of fines in the Stormceptor This empirical evidence lends credence to the coagulated settling theory indicating that the USEPA discrete particle settling
33. enience of reference only and are not to affect the construction or interpretation of this agreement This Agreement shall inure to the benefit of Us and our successors and assigns In the event any provision of this Agreement is held to be invalid or unenforceable the remaining provisions of this Agreement will remain in full force and effect You are hereby notified that Autodesk Inc Autodesk 111 McInnis Parkway San Rafael California 94903 is a third party beneficiary to this agreement to the extent that this agreement contains provisions which relate to Your use of Autodesk s software which is bundled with the Software Product Such provisions are made expressly for the benefit of Autodesk and are enforceable by Autodesk in addition to Us STORMCEPTOR 43 we Instruction Manual E 3 Stormceptor CD Sizing Program Version 4 0 0 Stormceptor Appenaix A sample Lookup Table STORMCEPTOR Instruction Manual U Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix A SAMPLE LOOKUP TABLE Once the simulation is complete the Sizing Program will automatically save to the Stormceptor root directory in which the program was installed Installation of the program is defaulted c Program Files Stormceptor Within the directory search for the table by state and ID number The file will have an tbl extension The file may be viewed in a spreadsheet program or a text editor program The example b
34. ent Mean Concentration mg 1 125 Buildup Exponent 0 400 Washoff Exponent 0 200 Availability Factors for Particles gt 400 um Availability A Bi C A 0 057 B 0 040 i rainfall intensity C 1 100 Stormwater Particle Size Distribution Table PARTICLE SIZE DISTRIBUTION Diameter Percent Specific Gravity Settling Velocity um 5 Ge Lists the PSD used in 20 0 20 0 1 30 0 0004 the software 60 0 20 0 1 80 0 0016 150 0 20 0 2 20 0 0108 400 0 20 0 2 65 0 0647 2000 0 SE 2 65 0 2870 Flocculated settling assumed for particles lt 20 um Rainfall records 1982 to 1999 RAINFALL Total rainfall period 18 years STATISTICS Total rainfall 13190 7 mm DEES Average annual rainfall 732 8 mm Detailed summary of the analysis of the rainfall station used for the specific run STORMCEPTOR C 1 4 UL Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormceptor Appendix C Rainfall event analysis RAINFALL EVENT ANALYSIS 2 0 hour inter event time used to determine of events lt in Events Vol mm Wees SE 6 35 2397 79 4 3620 Ji 4 Ay OLE 1270 347 11 5 3189 24 2 number and frequency 19 05 130 4 3 2037 15 4 of rainfall events of 25 40 66 222 as 10 9 various depihs The 31 75 38 1 3 1075 8 2 depth range is from 38 10 16 0 5 545 4 1 6 35 mm to 209 55 44 45 7 0 2 292 E mm 50 80 13 0 4 611 4 6 lela S 0 1 LOG 028 The table shows the Qed 2 Sack pore 0 9 rainfall depth number Sie s Se d ae of eve
35. eptor CD Sizing Program Version 4 0 0 Stormceptor Appenaix B Sizing Paper STORMCEPTOR Instruction Manual U Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B STORMCEPTOR HYDROLOGY AND NON POINT SOURCE POLLUTION REMOVAL ESTIMATES KKKK G Bryant R Grant D Weatherbe and V Berg Stormceptor Canada 195 The west Mall Suite 405 Etobicoke ON L3T 3K2 CAN New England Pipe 174 All Hallows Road Wauregan CT 06387 USA Donald G Weatherbe Associates 1352 Safeway Cres Mississauga ON L4X 1H7 CAN TP Stormceptor Corporation 600 Jefferson Plaza Suite 304 Rockville MD 20852 USA ABSTRACT A model was developed to estimate total suspended solids TSS removal in the Stormceptor an oil sediment separator The model was based on a commonly used continuous simulation model USEPA SWMM for hydrological processes The suspended solids loading was estimated using build up and wash off equations The solids were assumed to be distributed into five particle sizes for settling calculations Simulations were conducted using various assumptions of loading and settling velocities to determine the sensitivity of the model to assumptions Simulations were also conducted for a diverse range of geographic areas to determine the sensitivity of the TSS removal rates to regional hydrology The model was sensitive to the selection of settling velocities and pollutant loading The model was less sensitive to ch
36. etation of the above NCDC 15 minute time step of rainfall data is as follows 15M19210702QPCPHI 1984 06 0018 004 1430 0000000114 Number of Time of continues as Identification Year Month Day time steps Tip 24 hr Number of Tips fai ici 17 characters 4 2 4 recorded H 10 q 3 4 10 5 1 1 3 Rainfall Data 60 minute time steps The following is a brief interpretation of an NCDC file format for rainfall data taken at 60 minute time steps An example of this format is as follows Sample 60 minute NCDC file format HPDL9077003HPCPHI19480500210051300000002 2100000001 2200000001 2300000001 2500000005 HPDL9O 7OOSHPCPHILS4 0500220060200000008 0500000009 O600000015 OfO00000003 O800000003 250000003 HPDLSO OOSHPCPHILS4 80500250052000000001 2100000003 2200000003 2300000001 2500000008 The interpretation of the above NCDC 60 minute time step of rainfall data is as follows HPD19077003HPCPHI 1948 05 0021 005 1300 0000000241 Aere Time of continues Identification ie a e timesteps Number of Tips Tip 24 hr as required 17 characters recorded 10 3 4 10 Notes 1 Each line represents one day of recordings 2 Only rainfall data sets in 15 minute or 60 minute time steps may be used STORMCEPTOR 22 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcevtor 3 User made NCDC files must follow the same formatting as shown in the examples above 5 1 2
37. f particle size distribution and settling velocities are a key part of the modeling exercise Different settling velocities can be applied to the same particle size Table 1 Default Particle Size Distribution Particle Size by Mass um 0 2 20 a 50 20 20 20 distribution based on the specific gravity of ihe pariicles or to account for the effect of non ideal settling or the effect of flocculation on settling In this study a typical stormwater particle size distribution USEPA 1983 was used for analysis Table 1 The distribution given in Table 1 is commonly accepted by most regulatory agencies in North America The model allows the user to alter the percentages of each size based on site specific conditions if required In most areas it is anticipated that the particle size distribution will not vary significantly since it is primarily related to vehicle wear and atmospheric deposition There may be certain instances however where the native soils contribute loading and the default distribution needs to be altered The default percentages were used in this study Settling velocities were then assessed for each of the particle sizes provided in Table 1 Settling velocities were either calculated or based on empirical literature USEPA 1983 The calculation of settling velocities for small particles follows Stokes law equation 9 since the Reynolds number equation 10 is less than 0 3 Vs g Ps Pw d 18u STOR
38. f the majority of particles are fine in size The approach taken in this study was to use an availability factor for particles 400 um in size or larger Smaller particles follow the simple wash off estimates given by equation 2 The larger particles gt 400 um require greater runoff intensities to induce wash off according to the availability factor provided in equation 3 A 0 057 0 04 r 3 Where A availability factor r runoff rate mm h Equation 3 is based on research by Novotny and Chesters 1981 The runoff rate is used instead of rainfall intensity recognizing that the wash off will lag the rainfall based on the time of concentration The availability factor varies each timestep and is only applied to the runoff volume for that timestep as dictated in equation 4 The availabilty factor has an upper limit of 1 V Vi AN 4 Where V accumulated runoff volume used in equation 2 mm Vi accumulated runoff volume prior to current timestep mm A availability factor equals 1 for particles smaller than 400 um V runoff volume for current timestep mm The correction in equation 4 effectively re defines the accumulated runoff volume to be the runoff volume sufficient to mobilize the particles This methodology requires more accounting in the model but provides a more physically correct wash off model The separator was treated as a completely stirred tank reactor CSTR Alterations to the concentration of solid
39. fall station In this case select a rainfall station by selecting the Rainfall button as shown in the main user window Input the site information including the size of drainage area note that the appropriate unit is used when inputting this and the percent of impervious area for example if the imperviousness is 95 then enter 95 This displays the range of years of rainfall data used in the program simulation This display is based on the rainfall station the user has selected If this area is blank the user has not selected a rainfall station In this case select a rainfall station by selecting to the Rainfall button as shown in the main user window This identifies whether or not upstream storage is considered in the program analysis Yes is displayed if more than one flow control point has been entered by the user see Section 5 2 for a detailed explanation on Flow Control The display of No for upstream storage indicates that no flow control has been considered by the user Clicking on the Fine PSD button would select the default particle size distribution between 20 microns to 2000 microns for the simulation This particle size STORMCEPTOR 17 Instruction Manual UL Stormceptor CD Sizing Program Version 4 0 0 Stormceptor Coarse PSD SIMULATE Stormceptor Sizing Table distribution is displayed in the adjacent block Refer to Section 5 4 1 for more details about fine partic
40. following is a brief description of the menu bar as seen below Exit Dimensions View Print Web About Help Exit Closes the Sizing Program and returns to the Windows Desktop environment Dimensions Opens a window that lists the maximum sediment oil and total volume capacities of the various Stormceptor models as well as the diameter of the lower chamber of each Stormceptor unit see below Drawings of each model can be viewed when the model is highlighted and the View Hightlighted Model button is selected AutoCAD or Voloview must be installed in order to view the drawings Press the Print button to print the window and the Close buiton to close the window AL Stormceptor Dimensions a Dimensions Model 8 Sediment m3 Oil L Total Volume m3 1 3 1 4 1 2 325 0 950 0 950 0 950 0 3180 0 3180 0 3440 0 3440 0 4005 0 10585 0 10585 0 11560 0 Notes Sediment and Oil volumes are maximum capacities Diameter Diameter of lower tank below invert of pipe View Highlighted Model Print Close View Opens a drop down menu to select and view the drawing of a particular Stormceptor model AutoCAD or Voloview must be installed in order to view this Print Displays a drop down menu to select the sizing table or the detailed output file for printing Web The Stormceptor CD Sizing Program comes with a built in web browser that links you directly to the Stormceptor manufac
41. g the infiltration to the minimum rate more quickly The opposite is true for slower decay rates which would mimic soils with very good drainage The regeneration rate restores the infiltration capacity of a soil during periods where there is no rain or pervious depression storage The regeneration of infiltration rate is a function of the regeneration rate multiplied by the infiltration decay rate Higher rates of regeneration will restore infiltration capacity more quickly Infiltration can be negated during months when the pervious ground may typically be frozen Since temperature is not used in the Sizing Program the user enters a starting month and ending month for periods during each year where the ground would be frozen no infiltration Selecting frozen ground during certain months of the year reduces the pervious area to zero for those months For the frozen months the entire area is treated STORMCEPTOR 33 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior as 100 impervious in terms of depression storage Mannings n and infiltration none Selecting frozen ground during certain months does not alter the area used for build up and wash off of suspended solids 6 1 8 Daily Evaporation Daily evaporation depletes the water in depression storage Evaporation only occurs when ii is not raining 6 1 9 Dry Weather Flow Dry weather flow refers to a constant flow of water even when it is not ra
42. h off model is more theoretically and physically correct The EMC method has been shown to provide reasonable estimates of total solids loads Charbeneau and Barrett 1998 alone if the distribution of the load is not important The distribution of pollutant load is important for measures that incorporate a high flow by pass commonly known as first flush measures Accordingly preference is given to the build up wash off calculations to correctly distribute the pollutant load with flow recognizing the need to optimize the sizing of small site stormwater quality measures In the model solids build up and wash off are both approximated using an exponential distribution The distribution of solids build up is a function of antecedent dry days according to equation 1 Sartor and Boyd 1972 P P PA P 1 e 1 Where P solids accumulation up to day t kg P maximum solids build up 2 4 kg ha A drainage area ha P initial solids load on the surface not washed off from the previous storm kg k exponential build up factor 0 4 days t antecedent dry days The maximum pollutant build up P load was adjusted to provide similar long term solids loading rates 124 mg l when compared to the EMC method An exponential build up factor k of 0 4 was used based on previous literature SWMM 4 3 users manual A k value of 0 4 translates into 90 of the maximum solids build up occurring after 5 66 days Once the pol
43. he STC 300 0 008 70 68 59 ER treated STC 750 0 018 86 75 SET STC 1000 0 018 86 sre ECH E STC 1500 0 018 86 ER E Runoff Treated The STC 2000 0 030 92 79 Ths percentage of the STC 3000 0 030 R 81 78 flows Calculated that STC 4000 0 050 96 83 ee are below the STC 5000 0 050 SS 84 SS treatment capacity of STC 6000 0 070 97 86 85 the model STC 9000 0 100 99 89 89 STC 10000 0 100 99 89 89 Tank TSS Removal STC 14000 0 140 99 92 92 Estimated TSS removal efficiency of the model without by passing Overall TSS Removal Estimated TSS removal efficiency with by pass Hydrology Table Volume of Runoff Treated vs By Pass Flow Rate THEORETICAL RUNOFF TREATED Treated Q Treated Vol Over Vol Tot Vol Treated VS BYPASS cms m3 m3 m3 FLOWRATE 0 001 23003 95716 118933 5 5 0 004 60308 58632 118933 50 7 This table illustrates 0 009 86243 39703 118933 72 5 the percentage of 0 016 99782 t 118933 33 9 runoff that would be 0 025 106793 19143 118933 89 8 treated IF the 0 036 110874 8060 118933 93 2 Stormceptor had a 0 049 BELA 5471 118933 95 4 bypass flow rate as 0 064 115231 3703 118933 96 9 listed by the left hand 0 081 116418 2516 118933 97 9 column It simply 0 100 117223 1710 118933 98 6 shows that although 0 121 117782 1152 118933 99 0 the unit treats a low o a Ge EE See flow rate it is treating a 0 196 118494 439 118933 99 6 AA percentage of 0 225 118554
44. he latitude reference of the rainfall station Indicated if it is N for north or S for south in the first cell Enter the degree latitude in the second and third cells e Longitude enter the latitude reference of the rainfall station Indicated if it is E for east or W for west in the first cell Enter the degree longitude in the second and third cells e Temporal Resolution min enter the time step of the rainfall data Enter 15 for 15 minute time step rainfall data or enter 60 for 60 minute time step rainfall data This should be provided by the NCDC source STORMCEPTOR 23 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcevtor Note it is critical that the above information is accurate Otherwise the output file will reflect inaccurate information Double check to see that all information is inputted correctly Abbreviation and Station ID are used by the program to find the appropriate rainfall data set Changing the Abbreviation and Station ID without changing the name of the rainfall NCDC file name will result in an error Once the above is completed press Done 5 1 3 Delete Station Fluke Sharan To delete a rainfall station select the rainfall data from the displayed list and click on the Delete button The following window should appear asking if you are sure you want to delete this file Delete a Rainfall Station A You are about to permanently delet
45. he main sizing window opens as shown below LS Stormceptor CD Sizing Program Exit Dimensions View Print Web About Help E ba S Region esoe Units Metric Assumptions Calculations Rainfall Flow Lantral User s Manuel Project Details Hame Mini Fleet Centre Location Toronto Ontario Date duly 30 2003 Project 77 Company Bourque Lk Associates Contact R Bourque Selected Rainfall Station Particle urm LS Specific Gravity Selected Locat H scene PSY a a aa Fine PSD Coarse PSD LE i Y iai ETE me SE ia zl E 2000 Imperviousness SI o SIMULATE stormceptor Sizing Table Notes Stormceptor Model Runoff Treated 755 Removal Hotes 1 The 155 removal performance will vary depending on the actual influent 155 particle size distribution 2 The STC 6000 and 14000 are only available in Eastern Canada Southern Ontano Quebec and the Nantes The features on the main window including the Menu Bar Standard Tool Bar Project Details Site Parameters Selected Rainfall Station and Location Years of Rainfall Data Particle Size Distribution Flow Control Upstream Storage Simulate and Stormceptor Sizing Table STORMCEPTOR 12 Instruction Manual U Stormceptor CD Sizing Program Version 4 0 0 Stormcepior This section provides a general description of the function of the above items More details on the noted items can be found in Section 5 0 4 1 Main Menu Bar The
46. here the original sizing guidelines were developed Testing of the model with different rainfall timesteps 15 minute versus hourly indicated that hourly rainfall records can provide an adequate estimation of performance if the rainfall is collected at an adequate resolution 0 25 mm increments The modeling indicated that significant TSS removal rates can be achieved using small infrastructure control measures if the drainage area is limited The results lend credence to the positive field monitoring results obtained to date for the Stormceptor and to the concept of small storm hydrology being the predominant parameter for urban stormwater quality design REFERENCES 1 Alley W Estimation of Impervious Area Washoif Parameters Water Resources Res 17 1161 1981 2 Ball J and Abustan An Investigation of Particle Size Distribution during Storm Events from an Urban Catchment University of New South Wales 1995 3 Ball J Jenks R Aubourg D An assessment of the availability of pollutant constituents on road surfaces University of New South Wales 1997 4 Bryant G Misa F Weatherbe D Snodgrass W Field Monitoring of Stormceptor Performance 1995 5 Charbeneau R Barrett M Evaluation of methods for estimating stormwater pollutant loads Water Environment Research Volume 70 Number 7 1998 6 Henry D Liang W Ristic S Comparison of Year Round Performance for Two Types of Oil and Grit Separators D
47. ing which forms the basis for the existing sizing guidelines Toronto rainfall time series data 5 minute timestep were input to a continuous hydrologic simulation model Storm Water Management Model SWMM Version 4 3 to determine the percentage of annual runoff treated based on these sizing criteria The analysis of Toronto rainfall indicated that 80 90 of the annual runoff would be treated if the Stormceptor were sized according to the 1995 guidelines Figure 1 TSS Removal vs Stormceptor Total Storage 100 0 90 0 80 0 70 0 60 0 y 4 2417x 17 612 R 0 6137 90 0 40 0 TSS Removal 30 0 20 0 10 0 0 0 0 0 5 0 10 0 15 0 20 0 25 0 Total Stormceptor Storage m3 ha This study was initiated to address concerns about the applicability of the Toronto based sizing criteria for regional meteorological conditions METHODOLOGY A computer simulation model was developed based on the USEPA SWMM Version 4 3 Solids build up wash off and settling calculations were added to the hydrology code to estimate suspended solids capture by the Stormceptor STORMCEPTOR B 2 17 T Instruction Manual w Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B The model accommodates the use of either an EMC event mean concentration or build up wash off calculations to estimate suspended solids loads The build up was
48. ining Dry weather flow may occur from high groundwater levels artesian conditions cross connections with the sanitary sewer and or leakage from nearby or common trench pipes potable or non potable Dry weather flow is sometimes referred to as baseflow although the latter term is more commonly used to describe instream flows during periods without rainfall There is no dry weather flow as a default Dry weather flow would only be entered for the specific situation where the designer knows that there is a constant flow rate entering the Stormceptor during periods without rainfall 6 1 10 Maintenance Frequency The maintenance frequency determines how often the Stormceptor will be cleaned The value is entered in months A twelve 12 month maintenance frequency represents an annual cleanout of the Stormceptor Suspended solids accumulate at the bottom of the Stormceptor based on the efficiency of the separator on a continuous basis The depth and volume of solids that accumulate is based on the mass of solids their respective specific gravities and assuming a 75 voids space occupied by water Solids accumulation results in a loss of depth and storage volume The altered depth and storage volume values affect subsequent settling calculations After the cleanout the volume and depth of sludge are both reset to zero IMPORTANT Maintenance frequency is site specific It is strongly recommended that at completion of construction
49. ior 1 0 GENERAL 1 1 Introduction This instruction manual is prepared by The Stormceptor Group of Companies for users of the Stormceptor CD Sizing Program version 4 0 0 The purpose of this instruction manual is to provide guidance on how to install and use the software as well as an explanation on features of the software an explanation of the detailed output and theories behind the Stormceptor sizing methodology Previous versions of the software are The Expert System Version 2 0 sizing program for Canada and The Expert System Version 3 0 sizing program for the United States This version of the software Stormceptor CD Sizing Program version 4 0 0 is designed for users WORLDWIDE including sites in North America Australia Europe and Asia The purpose of the Sizing Program is to allow the user to size Stormceptor units customized for a specific geographic location of interest For sites that require certain parameters to be adjusted or considered assistance from a local Stormceptor representative for customized sizing 1 2 New Features For users who are familiar with the old sizing software often referred as the Expert System Sizing Program this newly released version 4 0 0 Sizing Program offers updated features including Compatibility with Windows 2000 and Windows XP Performance estimates of the Series Stormceptor System Updated CAD drawings Additional rainfall records Updated detailed output D
50. irect access to the local Stormceptor web page through a built in web browser and e Look up table output 1 3 Disclaimer Stormceptor offers this software program Stormceptor CD Sizing Program Sizing Program to stormwater quality designers and specifiers on the conditions and understanding that 1 Whilst Stormceptor has endeavored to include relevant stormwater quality design considerations in the Sizing Program to allow its use in a broad range of situations A the Sizing Program is uses standard assumptions that may not reflect every site STORMCEPTOR 4 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 1 4 B the Sizing Program should only be used as a guide and C the Sizing Program input of job specific information and the interpretation verification and application of Sizing Program output data Data is the responsibility of the Program user and should be performed by an appropriately qualified engineer To the maximum extent permitted by law Stormceptor A makes no representations or warranties express or implied as to the accuracy reliability or completeness of the Sizing Program or Data and B disclaims any duty of care and liability whether or not arising out of Stormceptor s negligence default or lack of care for any loss or damage whether direct or indirect and whether foreseeable or not suffered by the Sizing Program user or any other
51. is N for north or S for south in the first cell Enter the degree latitude in the second and third cells e Longitude enter the latitude reference of the rainfall station Indicated if it is E for east or W for west in the first cell Enter the degree longitude in the second and third cells e Temporal Resolution min enter the time step of the rainfall data Enter 15 for 15 minute time step rainfall data or enter 60 for 60 minute time step rainfall data This should be provided by the NCDC source Note it is critical that the above information is accurate Otherwise the output file will reflect inaccurate information Please double check to ensure that all information is inputted correctly Once the above is completed press Done Step 5 The rainfall station that you have added should now be on the rainfall list Now you may select it and press Done Step 6 Create the NCDC data file and save it in Stormceptor Rainfall files directory of the program Please refer to section 5 1 1 1 for details on creating the NCDC data file 5 1 1 1 NCDC Hourly and 15 Minute Precipitation Files Continuous historical rainfall data sets used by the Stormceptor CD Sizing Program must be in an NCDC format The rainfall data sets incorporated in the program were obtained from Earthinfo Inc Environment Canada the City of Toronto and other jurisdictions The NCDC format lists by date and time the number of tips r
52. ite SpeCIIC Particle SEITEN gege 28 E OOA soacra SOP CeO cS ri a ma iu ao atac ap Ea Ed 29 5 6 INTERPRETING THE OUTPUT EE 30 6 0 MATHEMATICAL MODEL THEORY eee REENEN ENK ENNEN ENKEN REENEN ENKEN e 31 Eech AV Lee GY edd 32 Dlr o gt gee enn ee ara een aaa La ii at ca ia eee ee A a iat ai ea 32 6 12 HID CIVIOUSING SS sia te aa ditai na A mai a ata aaa deg 32 EE El EEN 32 STORMCEPTOR 6 6 6 6 1 6 6 6 6 1 12 Summary of Sizing Program Assumptions 62 SITE CONDITIONS EE 6 3 SITE AREA AND IMPERVIOUSNESS nananannanannnnnnnnnnnnn 6 4 PARTICLE SIZE DISTRIBUTION eee aaa 6 5 LOCAL HISTORICAL RAINFALL DATA 6 6 HYDRAULIC CONDITIONS ananannnnonnnnnnnnnnnnnnnnnnnnnrnnnnnnn 7 0 DESIGN SUPPORT eee eee nana eee nana nana na poa naa nana 8 0 SOFTWARE LICENSE TERMS AND CONDITIONS LIST OF APPENDICES APPENDIX A Sample Lookup Table APPENDIX B Sizing Paper APPENDIX C Interpretation of the Output File LIST OF FIGURES Figure 6 1 Flowchart of the Stormceptor System Sizing Methodology LIST OF TABLES Table 5 1 Fine Particle Size Distribution Table 5 2 Coarse Particle Size Distribution Table 6 1 Default USEPA SWMM Parameters STORMCEPTOR Daily Evaporaton 1 9 Dry Weather Flou 1 10 Maintenance Frequency assoaaannneaaaaann 6 1 11 TSS Loading and Capture Simulation 31 28 32 Instruction Manual U Stormceptor CD Sizing Program Version 4 0 0 Stormceo
53. izing Program Help Application Limitations of the i H Stormeeptor Sizing Program Program 3 What ie a Stomceptar 2 Features of the Sizing Program This program was designed to a Limitations of the Program accommodate the needs of most ofthe 2 Computer Requirements common urban applications where the 7 Acknowledgements Stormceptor will be used There are certain Gs Legal information applications where the program should not How to Use the Program be used in the design of a Stormceptor which i r Sizing Basis include the following 1 Sites that exhibit unstable wash off characteristics such as construction sites and sites with material storage Sites with a typical suspended solids characteristics such as coal manufacturing facilities cement manufacturers sites with a particle size finer or coarser than that given by the USEPA NURP Sites with altered post development annual hydrology Alterations tothe Ni STORMCEPTOR 15 Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Calculations methodology See below EK Stormceptor Sizing Program Help d e amp LO Stormceptor Sizing Program What is a Stormceptar B Features of the Sizing Program 2 Limitations of the Program Howto Use the Program LO Sizing Basis 2 Solde Wash Off 2 Washott Availability 2 Particle Size Distribution 2 How Quantity Control 2 TSS Setting Calculatio
54. kly becomes asymptotic with increasing treatment flow rate A device that treats 30 L s prior to by pass would treat approximately 80 of the annual runoff A device that treats 70 L s over 2x higher flow rate only treats 10 more runoff 90 Although the relationship between conveyance of annual runoff treated and TSS removal is non linear Figure 4 shows that high rate treatment devices are not required for small drainage areas Figure 4 Annual Runoff Treatment Toronto 2 25 ha CH 0 rs all ho toba Le O es CC CO c st aS Flow Rate L s STORMCEPTOR B 11 17 Instruction Manual AS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B Figure 3 TSS Removal Performance vs Settling Velocities 90 80 A z 70 7 EP A Hg 60 g e a 50 J USEPA E 40 e O SG 1 3 LC ia XK SG 1 8 ok 30 A SG 2 65 20 e Existing Sizing 10 0 6 8 10 12 14 16 Stormceptor Storage m3 ha The relationship provided in Figure 4 will vary with local meteorological conditions and this is inherently accounted for in the TSS removal modeling Regional TSS Removal Performance Analysis The model was used to compare results from different areas in North America and Australia to determine the effect of regional hydrology on TSS removal performance All analyses were conducted using 15 minute rainfall data based on the TSS build
55. le size distribution Clicking on the Coarse PSD button would select the default coarse particle distribution 150 microns to 2000 microns for the simulation This particle size distribution is displayed in the adjacent block Refer to Section 5 4 2 for more details about fine particle size distribution Clicking on the SIMULATE button will initiate the program to run through calculations for the selected rainfall data and will provide output results for the Stormceptor Sizing Table Once the SIMULATE buiton is selected the program will run and a summary of all Stormceptor models and the respective percent runoff treated and TSS removal performances for the site of interest is summarized and displayed on the screen At this time a detailed output file is also available for the user to save to file for print STORMCEPTOR 18 UL Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 5 0 SIZING ASTORMCEPTOR UNIT This section runs though the steps for sizing a Stormceptor unit These steps include the following Select a Rainfall Station Inout Upstream Quantity Flow Control Optional Input Site Parameters Choose the particle size Click Simulate and Interpreting the Output File eee ee Detailed explanations of these steps are provided below 5 1 Selecta Rainfall Station The Stormceptor CD Sizing Program comes complete with local continuous historical rainfall da
56. lutant build up reaches the 2 4 kg ha limit additional build up is not allowed assumed to be wind re suspended driven off the surface Wash off is estimated using equation 2 Pi Pek 2 Where Pt solids remaining on the surface at day t kg Pi initial solids load from equation 1 kg k exponential decay factor 0 2 mm V volume of accumulated runoff from the surface mm The exponential decay factor k of 0 2 was based on a review of previous literature that indicated k values range from 0 03 to 0 55 Alley 1981 Charbeneau and Barrett 1998 STORMCEPTOR B 3 17 Instruction Manual U Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B Charbeneau and Barrett 1998 found that the simple wash off model adequately described observed solids wash off in Austin Texas Other researchers have cited that the wash off equation 2 is reasonable for fine material but may not be reasonable for larger solids that require a high rainfall intensity for mobilization Metcalf and Eddy 1971 Ball and Abustan 1995 The SWMM model treats wash off as a function of the runoff rate to account for mobilization This correction is applied indiscriminately to the entire solids load and does not account for the variation in wash off rate with particle size If an availability factor is applied to all particle sizes uniformly the model will underestimate the wash off of solids with increasing runoff volume i
57. meters SWMM models catchments and conveyance systems based on input rain temperature wind speed and evaporation data Only rain data were used in these analyses The default SWMM daily evaporation values 2 5 mm day were used Evaporation data will not be important in this analysis since the catchment area is small lt 10 ha and has minimal depression storage The Horton equation was chosen for infiltration The method of infiltration chosen is unimportant due to the small amount of pervious area 1 Table 3 provides a list of the parameters used in the SWMM model Area ha ac variable Imperviousness 99 Width m ft variable Slope 2 Impervious Depression Storage mm 4 7 0 19 in Pervious Depression Storage mm 0 5 0 02 in Impervious Mannings n 0 015 Pervious Mannings n 0 25 Maximum Infiltration Rate mm h 62 5 2 46 in hr Minimum Infiltration Rate mm h in hr 10 0 39 Decay Rate of Infiltration s 0 00055 The width of catchment was assumed equal to twice the square root of the area RESULTS EMC versus Build up Wash off The suspended solids removal results based on the build up wash off model were compared to those based on an EMC 124 mg l USEPA 1983 to demonstrate the sensitivity of the model to the different solids loading approaches The use of an EMC assumes an equal concentration of suspended solids in all of the stormwater that is conveyed to the Stormceptor Figure 2 shows a comparison
58. ner R Bourque Notes Rainfall Station TORONTO CENTRAL RAINFALL DATA Rainfall File ON100 NDC Ee i e ay EE continuous rainfall data evation m in the program Rainfall Period of Record 1982 to 1999 used in t CAINS Site Parameters SITE PARAMETERS Total Drainage Area 1 00 ha Summary of site Een DEEN SS RER characteristics used by aa ML a the program Only the Overland Slope 2 0 drainage area and total Impervious Depression Storage 0 508 m Pervious Depression Storage 5 080 m M E AIE ee elle Impervious Mannings n 0 015 controlled by the user Pervious Mannings n 0 250 Infiltration Parameters INFILTRATION PARAMETERS Horton Infiltration Used Initial Max Infiltration Rate 61 98 mm h Default values Binal Min Infiltration Rate 10 16 mm h calculated by the Infiltration Decay Rate 1 sec 0 00055 Serres Infiltration Regeneration Rate 1 sec 0 010 prog i Daily evaporation 2 540 mm day STORMCEPTOR C 1 4 Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix C Sediment build up reduces the storage volume for settling BUILD UP WASH calculations OFF A maintenance cycle of 12 months was chosen The Stormceptor will be cleaned out every 12 months These are standard TSS Loading Calculations parameters used in the build up of pollution on Buildup Washoff Loading Chosen an impervious surface Buildup Washoff allocates more washoff in the rising limb of the hydrograph Target Ev
59. nfall resolution Results based on hourly rainfall data 0 25 mm resolution were compared to those based on 15 minute rainfall data to determine the impact of using the hourly data Hourly data is more readily available than 15 minute data and most large cities have airports that collect rainfall on an hourly basis The model reads the hourly data as rainfall that falls during the first fifteen minute timestep of each hour This will produce higher intensities since the rain is not distributed correctly over the entire hour The greater intensity is compensated however by the completeness of the hourly records which translates into a greater number of small rainfall values STORMCEPTOR B 14 17 Instruction Manual AS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B Four areas were analyzed Rockville Maryland Boston Massachusetts Miami Florida and Houston Texas The results of this analysis Figure 6 indicate that the use of hourly data does not significantly alter the TSS removal estimates for units that are designed to remove over 40 of the annual TSS load Greater discrepancies can be expected at large ratios of drainage area to separator storage Figure 6 TSS Removal vs Rainfall Timestep 90 80 70 NC Wei E e0 Es a Se amp MD 15 min 3 50 A MD 60 min 5 40 e FL 15 min K 304 e FL 60 min SM TX 15 min TX 60 min 10
60. not to install Voloview the options to view the CAD files from the Sizing Program will not work correctly lf you have a CAD program installed and are unable to access the drawings through the program please install Autodesk Voloview Once installed the program may be uninstalled Step 6 Once the program has been installed select Stormceptor Sizing Program from your computer s Start menu or double click on the Stormceptor Sizing Program on the desktop or in the installed directory Doing either will start the program STORMCEPTOR 10 Instruction Manual U Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 3 2 Uninstalling the Sizing Program To uninstall Stormceptor CD Sizing Program Step 1 Start the operating system on your computer turn on computer Step 2 Insert the Stormceptor CD Sizing Program into your CD ROM drive Step 3 The InstallShield Wizard will open click Next Step 4 When Program Maintenance menu opens select the Remove button and click Next Step 5 Confirm that you wish to remove the program Click on the Remove button Alternately you can click on the Start menu then on Settings then on Control Panel From there you can select Add Remove Programs and follow the onscreen instructions STORMCEPTOR 11 Le Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormceoior 4 0 USER INTERFACE OVERVIEW When you start the Stormceptor Sizing Program t
61. ns wa Updates 4 3 Project Parameters Mg Stormceptor CD Sizing Program Exit Dimensions View Print Web About Help Region Canada wW Stormceptor Opens a help window describing the Sizing Program sizing Sizing Basis The sizing basis for the Stormceptor is based on continuous simulation of hydrology and total suspended solids TSS settling The model has been calibrated to field monitoring results from actual Stormceptor units that have been monitored in Nerth America The sizing process can be described in three processes 1 Determination of realtime flows 2 Buildup and Washoff of TSS from impervious land areas 3 T55 transport through the Stormceptor settling discharge by pass The use of a calibrated model is the preferred method for sizing stormwater quality structures for the following reasons Je t i Units Metric D Assumptions Calculations Rainfall Flow Control User s Manual Project Details Name Mini Fleet Centre Location Taronta Ontario Date July 30 2003 Project 77 Selected Rainfall Station Company Bourque amp Associates Contact IR Bourque Selected Location TORONTO CENTRAL Selected State Prov Ontario Upstream Storage Site Parameters Years Area ha 0 81 Imperviousness 90 Stormceptor Sizing Table 1982 to 1999 Runoff Treated T55 Removal Starmceptor Model STC 10000 STC 14000 4 Fine PS
62. nts that occurred GE Ge da Ee percentage of rainfall 88 90 1 0 0 85 0 6 95 25 0 0 0 o SC 2 events that occurred at 101 60 0 0 0 e 0 0 that depth the total 107 95 0 0 0 0 0 0 depth of rainfall that ia 26 0 0 0 0 0 0 fell at that event depth 120 65 0 0 0 0 0 0 and the percentage of 127 00 0 0 0 O 0 0 rainfall that fell at that 133 35 0 0 1 5 1 0 depth 139 70 0 0 0 0 0 0 146 05 0 0 0 0 0 0 The summary gives 152 40 0 cone 0 0 0 the users and m i ie i Se i Se regulatory agencies an ree GC Sp GC eege 177 80 0 0 0 0 0 0 requency of l 184 15 0 0 0 0 0 0 occurrence of various 190 50 0 0 0 0 0 0 depths of rainfall in the 196 85 0 0 0 0 0 0 geographic area 203 20 0 0 0 0 0 0 209 55 0 0 0 0 0 0 gt 209 55 0 0 0 0 0 0 Total rain 13191 mm Number of rain events 3020 STORMCEPTOR C 2 4 Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormceptor Appendix C Rainfall intensity analysis RAINFALL INTENSITY Average intensity 2 52 mm h ANALYSIS lt mm h Number Vol in 6 35 19743 94 5 9282 70 4 This table outlines the 12 70 787 3 8 1740 13 2 Ge of the 19 05 88 0 9 703 5 3 various rainfall 25 40 35 0 4 183 307 intensities from 6 35 31 75 21 0 2 248 i9 mm hour to 209 55 30 10 10 0 1 184 1 4 mm hour It considers 44 45 12 0 0 102 0 8 the intensity of each 50 80 3 0 1 140 sg data entry Therefore Tets 9 0 0 40 1E for 15 minute data it 63 50 2 0 0 135 1 0 looks at the intensity
63. of Ge Ee SCH Ee each 15 minute data Dee Se e point For 60 minute 88 90 0 0 0 0 0 0 ee because you 95 25 0 0 0 0 0 0 e Moreran 101 60 0 0 0 0 0 0 entering at the same 107 95 1 0 0 27 0 2 period of time 15 114 30 0 0 0 0 0 0 minutes the rainfall 120 665 0 0 0 0 0 0 will appear more 127 00 0 0 0 0 0 0 intense 133 35 0 0 0 0 0 0 139 70 0 HP H 0 0 The table shows the 146 05 0 0 0 0 0 0 intensities the number eege vee ue vee of data inputs with that oe O 0 0 0 0 0 intensity the oe d 9 GE ve GE percentage of data 171 45 0 0 0 0 0 0 EE 7 ae ae points that had that oa a o 0 0 e 0 0 intensity the depth of 190 50 0 0 0 0 0 0 rain that fell at that 196 85 0 0 0 0 0 0 intensity and the 203 20 0 0 0 0 0 0 percentage of total 209 55 0 0 0 0 0 0 volume that fell at that gt 209 55 1 0 0 54 0 4 intensity The summary gives Total rainfall 13190 7 mm the users and Total evaporation 1375 2 mm regulatory agencies an Total infiltration 0 0 mm idea of the scale and Rainfall as runoff 90 2 frequency of occurrence of various Average Event Mean Concentration for TSS mg 1 125 2 intensities of rainfall in the geographic area STORMCEPTOR C 3 4 Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormceptor Appendix C TSS Removal Simulation Results Table PERFORMANCE SUMMARY Stormceptor Treated 9 Runoff Tank TSS Overall TSS Model cms Treated Removal Removal 3 Treatment Q T
64. once the site is stabilized that the unit be inspected at least once every six months to determine the rate of sediment accumulation and subsequently the frequency of servicing may be determined 6 1 11 TSS Loading and Capture Simulation Based on the hydrologic output and site information i e particle size distribution site area and percent imperviousness of site area settling characteristics of sediment based on particle size distribution are determined and the simulation of solids build up and wash off from surfaces and solid retention using continuous stir tank reactor or CSTR equation in the lower chamber of each Stormceptor unit model is calculated This process is extensive as it is multi dimensional and involves iterations dependent on each time step of rainfall runoff including inter event periods particle size distribution and dimensions from each Stormceptor model Once iterations of TSS capture and treatment flows are complete removal efficiencies are averaged and the long term TSS STORMCEPTOR 34 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior removal efficiency of each Stormceptor unit model is determined The results are displayed in an output file for the user s use Once the simulation is complete the designer can choose the appropriate unit size based on the project design goal for percent overall removal efficiency of TSS and the overall percent treatment of runoff on
65. ons window An Add Edit Rainfall Station window will appear Step 4 Input identification and geographical information available for the rainfall data set Fill in the information for e State Province Region Type in the complete name of the state province or region applicable to the rainfall station you are adding Please keep note of this abbreviation as it will be used to name the NCDC rainfall file being added to the existing database of rainfall files Section 5 1 1 1 e Abbreviation Type in the abbreviation for the state province or STORMCEPTOR 20 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior region e Station ID enter the ID for the rain gage This should be provided by the NCDC source Please keep note of this number as it will be used to name the NCDC rainfall file being added to the existing database of rainfall files Section 5 1 1 1 e Location enter the location of the rain gage This should be provided by the NCDC source e Beginning Year enter the year in which the first rainfall event occurred This should be provided by the NCDC source e Ending Year enter the year in which the last rainfall event occurred This should be provided by the NCDC source e Elevation enter the elevation of the site Make sure the number entered is consistent with the units selected e Latitude enter the latitude reference of the rainfall station Indicated if it
66. or any purposes prohibited by export laws You shall be responsible for procuring all required permissions for any subsequent export import or use of the Software Product Section 13 MISCELLANEOUS 1 This agreement is the entire agreement between Us and You pertaining to Your right to use the Software Product and supersedes all prior or collateral oral or written representations or agreements related thereto 2 This agreement shall be governed by the laws of the Province of Ontario and the laws of Canada applicable in the Province of Ontario Each of the parties hereto STORMCEPTOR 42 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior irrevocably submits to the non exclusive jurisdiction of the courts of the Province of Ontario Except as otherwise provided herein no term or provision hereof shall be deemed waived and no breach excused unless such waiver or consent shall be in writing and signed by the party claimed to have waived or consented Any consent by any party to or waiver of a breach by the other whether express or implied shall not constitute consent to waiver of or excuse for any other different or subsequent breach Unless otherwise specified words importing the singular include the plural and vice versa and words importing gender include all genders The division of this agreement into sections the insertion of headings and the provision of a table of contents are for conv
67. or use It allows the Stormceptor Representative to provide analysis of special design scenarios A detailed explanation of the theory behind the mathematical model is presented in Appendix B STORMCEPTOR 31 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormceptor 6 1 Hydrology The hydrological analysis portion of the Sizing Program is based on the USEPA SWMM Fifteen minute or hourly rainfall data was obtained for the entire USA from Earthinfo on CD ROM SWMM was used to model catchments and conveyance systems based on input rain temperature wind speed and evaporation data Only rain data were used in the Sizing Program to compute hydrograph ordinate for each time step The default SWMM daily evaporation value of 2 5 mm day 0 1 inch day was used The simulation results should not be sensitive to evaporation since most catchment areas being simulated will be small SWMM parameters used in the model are shown in Table 6 1 Table 6 1 Default USEPA SWMM Parameters Parameters Values Dry Weather Flow cfs 6 1 1 Area Area represents the total area of the site in question 6 1 2 Imperviousness Imperviousness is the percentage of the area that is covered with hardened surfaces Generally there are two types of imperviousness directly connected and indirectly connected Directly connected refers to impervious areas that connect to drainage pipes without flowing over any pervious area The Sizing P
68. r of Ours 2 not make the Software Product available to any third party in any manner including on an application service provider or service bureau basis 3 not copy the Software Product or any software bundled with the Software Product except as necessary to read the Software Product or such bundled software into the memory of a computer solely for the purpose of executing it or to make one copy thereof solely for backup purposes Such copies shall be subject to the provisions of this agreement and shall contain the same proprietary notices which appear on and in the Software Product and any software bundled with the Software Product 4 not assign this agreement or transfer lease export or grant a sublicence of the Software Product or the licence contained herein to any third party except as and when authorized to do so by Us in writing 5 not alter reverse engineer decompile or disassemble the Software Product or any software bundled with the Software Product 6 not use the Software Product except as authorized herein and 7 prevent third parties from using the Software Product in any way that would constitute a breach of this agreement including without limitation such precautions as You would otherwise take to protect Your own proprietary software hardware or information Section 3 OWNERSHIP Title to and ownership of all intellectual property rights in the Software Product and any software bundled with the Software P
69. raft paper 1999 7 Labatiuk C Nataly V Bhardwaj V Field Evaluation of a Pollution Abatement Device for Stormwater Quality Improvement CSCE Environmental Engineering Conference Edmonton 1997 8 Novtony V Unit Pollutant Loads Water Environment amp Technology 1992 9 Sartor J Boyd G Water Pollution Aspects of Street Surface Contaminants EPA R2 72 081 U S gt Environmental Protection Agency Washington D C 1972 10 Tchobanoglous G Schroeder E Water Quality University of California at Davis 1987 STORMCEPTOR B 16 17 A Instruction Manual w Stormceptor Stormceptor CD Sizing Program Version 4 0 0 Appendix B 11 U S Environmental Protection Agency Final Report of the Nationwide Urban Runoff Program Water Planning Division Washington D C 1983 12 U S Environmental Protection Agency Storm Water Management Model Version 4 3 User s Manual Washington D C 1988 STORMCEPTOR B 17 17 Instruction Manual Je Stormceptor CD Sizing Program Version 4 0 0 eptor Appendix C Interpretation of Output File STORMCEPTOR Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix C Stormceptor TM Sizing Program Version 4 0 0 Country Canada PROJECT INFO Date User input project Project Number pu SA E information including Lee Name ini ee entre any special notes Project Location Toronto Company R Bourque amp Associates Desig
70. reting the Output File Section 6 0 This section describes the theory behind the mathematical model used in the Sizing Program and the parameters considered in the continuous simulation model including hydrology parameters site conditions site STORMCEPTOR 5 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormceptor area and imperviousness particle size distribution local historical rainfall data and hydraulic conditions Section 7 0 This section presents local Stormceptor Representatives contact information for design support or questions Section 8 0 This section presents the Stormceptor sizing software license agreement and terms and conditions STORMCEPTOR 6 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 2 0 STORMCEPTOR CD SIZING PROGRAM This section provides a general description about the Stormceptor CD Sizing Program limitations and minimum specifications for installation of the Sizing Program 2 1 General Description The Stormceptor CD Sizing Program version 4 0 0 is proprietary sizing software which applies a mathematical model to estimate sediment accumulation hydrology and long term pollutant removal The Sizing Program has been calibrated to field monitoring results from actual Stormceptor units that have been monitored in North America with a resulting correlation coefficient R of 0 94 as presented in Figure 2 1
71. rial The default PSD was developed from United States Environmental Protection Agency USEPA National Urban Runoff Program NURP studies completed in 1983 Table 5 1 Fine Particle Size Distribution Particle Size Percent by Specific uum mass Gray Note 20 um particle size or less assumes flocculation occurs 5 4 2 Coarse Particle Distribution The user has the option to select the coarse particle distribution which consists of particle sizes ranging from 150 microns to 2000 microns as presented in Table 5 2 This distribution can be used to size the Stormceptor units but is not recommended by Stormceptor as finer particles are usually present at most sites For sites that have larger PSD or for comparison with alternate products that may use a similar PSD the coarse PSD can be used It is up to the designer to decide which PSD option is appropriate for the site Should you require further assistance please call your local Stormceptor Representative Table 5 2 Coarse Particle Size Distribution Particle Size Percent by Specific um Gray 2000 5 4 3 Site Specific Particle Distribution Particle size distributions outside of the default fine PSD will result in different TSS removal efficiencies for the Stormceptor system It is recommended that the actual PSD for sites where possible be measured prior to sizing The Stormceptor representatives have a version of the Sizing Program which allows the user
72. roduct including copies thereof any other physical media and all information generated through the use of the Software Product shall remain with Us and our suppliers Section 4 CONFIDENTIAL INFORMATION You acknowledge that the Software Product contains information including without limitation methods and formulas that is confidential and proprietary to Us Confidential Information You agree not to disclose any Confidential Information to any third party or to use any Confidential Information for any purpose other than the purposes set forth above Section 5 NO WARRANTY THE SOFTWARE PRODUCT IS PROVIDED AS IS WITHOUT WARRANTY REPRESENTATION OR CONDITION OF ANY KIND EXPRESS OR IMPLIED IN FACT OR IN LAW INCLUDING BUT NOT LIMITED TO WARRANTIES OF STORMCEPTOR 40 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior NONINFRINGEMENT OR THAT THE SOFTWARE PRODUCT IS BUG FREE THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABLE QUALITY MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND THOSE ARISING BY STATUTE OR OTHERWISE IN LAW OR FROM A COURSE OF DEALING OR USAGE OF TRADE Section 6 SOFTWARE PRODUCT MERELY A TOOL 1 The Software Product is merely intended to be only a tool to assist You and is not a substitute for Your decision You acknowledge that We are not providing you with engineering or other professional advice by licensing the Software Product and that the re
73. rogram does not distinguish between the two types of impervious area and treats all of the impervious area as directly connected Some regulatory agencies may reduce the total imperviousness of a site if some of the water flows over pervious areas i e indirectly connected impervious areas such as rooftops discharging to grassed areas recognizing that not all of the water will reach drainage pipes and be conveyed downstream Roof tops draining to the storm sewer system must be considered when determining the total impervious area 6 1 3 Width Width refers to the width of flow and not just the width of the area The program uses this definition in the default calculation of width twice the square root of the area Most areas are not square and the width of flow will depend on the shape of the area slope STORMCEPTOR 32 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior and conveyance system The flow width can be manually entered in the program based on the site specific information 6 1 4 Slope The slope of the site affects the time of concentration or travel time for water to reach the Stormceptor Higher slopes result in shorter times of concentration 6 1 5 Depression Storage Depression storage is storage that must be filled by rainfall before surface runoff can occur The program provides for depression storage over both the pervious and impervious areas of the area Depression storage is en
74. rque amp Associates Contact D Bourque Selected Rainfall Station ae Sea Selected Location TORONTO CENTRAL N ea chases No eee lum a Selected State Prov Ontario pm _FrePSD Coarse PSD Seana eats 400 20 205 dl 18 1982to 1938 i 2000 Imperviousness 90 i Stormceptor Sizing Table Starmceptor Model STC 10000 STC 14000 Notes 1 The TSS removal performance will vary depending on the actual influent TSS particle size distribution 2 The STC 6000 and 14000 are only available in Eastern Canada Southern Ontario Quebec and the Maritimes STORMCEPTOR 29 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 5 6 Interpreting the Output File Interpretation of the output file is presented in Appendix C The detailed output includes project information the rainfall data used site parameters infiltration parameters build up wash off parameters particle size distribution used rainfall statistics rainfall event event analysis rainfall intensity analysis performance summary and theoretical percent runoff treated versus bypass flowrate STORMCEPTOR 30 UL Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 6 0 MATHEMATICAL MODEL THEORY The Sizing Program consists of two modules One module is based on the USEPA Stormwater Management Model SWMM Version 4 3 to model and to interpret the hydrology specific to the site The
75. s 3 28 ft s o The inlet invert must be 25 mm 1 in higher than the outlet pipe invert for an Inline Stormceptor unit and 75 mm 3 in for a multiple inlet Inline Stormceptor unit For the Inlet and Series Stormceptor models the difference between the inlet and outlet pipes is 75 mm 3 in e The largest inlet outlet pipe size that can be accommodated without customization is 1050 mm 42 in reinforced concrete pipe With customization the largest inlet outlet size that can be accommodated is 1950 mm 66 in I D reinforced concrete pipe and e There is a minimum requirement of 1 0 m 3 33 ft to 1 2 m 4 ft of cover above the crown of the pipe inside top of pipe to the top of grade for the concrete Stormceptor unit Please contact your local Stormceptor Representative for confirmation STORMCEPTOR 3 Instruction Manual lu Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 7 0 DESIGN SUPPORT Further technical support may be obtained by contacting your local Stormceptor Representatives Langley Concrete Group Ltd 604 533 1656 Lafarge North America Western Canada Pipe Canada Hanson Pipe amp Products Canada Inc ie get geg Lecuyer et Fils Ltee 1 800 561 0970 NB NF PE NS Strescon Limited 506 633 8877 AL AK AS AZ AR CA CT DE DC FM FL GA GU HI IL IN IA KS KY LA ME MH MD MA MI MN MS Rinker Materials MO NE NV NH Hydro Conduit NJ NM N
76. s in the separator will vary according to equation 5 Tchobanoglous and Schroeder 1987 CV QC QCG rcV 9 STORMCEPTOR B 4 17 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Appendix B Where C the change in concentration of solids in the tank with time kg m s Q flow rate through the tank m s C solids concentration in the influent to the tank kom C solids concentration in the tank kg m V tank volume m fo reduction in solids in the tank kg m s For gravity settling devices r can be estimated using equation 6 fo VsC D 6 Where r reduction in solids in the tank kg m s Vs settling velocity of solids m s D depth of tank m C concentration of solids in the tank kg m Substituting equation 6 into equation 5 solving the first order differential equation and integrating provides the general form of the non steady state solution equation 7 for the concentration in the tank at time t em QC V V D 4 Q V 1 eidel SC 4 Ca Q V t 7 Where C concentration in the tank at time t kom Ci concentration in the flow influent to the tank kg m C concentration in the tank at the beginning of the timestep kg m Q flow rate through the tank m s V volume of water in the tank m Vs suspended solids settling velocity m s D tank depth t time Equation 7 was used to estimate the suspended solids concentration
77. second module estimates TSS loading from the site to the Stormceptor unit and removal treatment efficiencies based on stable or unstable site conditions Figure 6 1 presents the flowchart of the sizing methodology for the Sizing Program STORMCEPTOR SYST H H H H H H Input Site Area Imperviousness SWMM default parameters can be modified by Exponential Build Stormceptor up amp Wash off representative Based on based on USEPA USEPA SWMM _ SWMM 4 31 RUNOFF Historical Local Module Rainfall Data gt Event Mean Concentration Upstream Flow fo X p Control TSS Removal Efficiency Overall Percent Treated Flow epee EEE eee Exponential Build i up amp a r WE i Combination of Site Sediment i Exponential Loading i Wash off amp Power Conditions i Wash Off stable i unstable winter sanding or event mean concentration Particle Size Distribution em em ewe em Ken mm pm pm e mm pm pm mm pm pm pm mm pm pm pm mm User Input Select or Calculate Site Calculate TSS Loading Calculate TSS Modify Parameters Hydrology Module 1 Module 2 Removal amp Treated Flow Efficiencies Figure 6 1 Flowchart of the Stormceptor System Sizing Methodology NOTE Dashed lines identify unique functions available in the TM version of the software The TM version is only available to Stormceptor Representatives f
78. sults provided by the Software Product do not constitute engineering or other professional advice 2 You acknowledge and agree that the Software Product was designed for use only for the Stormceptor System Without limiting any other provision of this Agreement You acknowledge that the output provided by the Software Product will not be accurate or useful in connection with any product or system other than the Stormceptor System Section 7 DISCLAIMER IN NO EVENT SHALL WE OR OUR SUPPLIERS BE LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL SPECIAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE INCLUDING WITHOUT LIMITATION DAMAGES FOR LOST BUSINESS PROFITS OR LIABILITIES OR INJURIES TO THIRD PARTIES WHETHER FORSEEABLE OR NOT AND WHETHER IN AN ACTION IN CONTRACT TORT INCLUDING NEGLIGENCE OR OTHERWISE EVEN IF WE OR OUR SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES Some states or other jurisdictions do not allow the exclusion or limitation of incidental consequential or special damages or the exclusion of implied warranties or limitations on how long an implied warranty may last section 8 IRREPARABLE HARM You acknowledge and agree that the breach by You of any of the provisions of this agreement would cause serious and irreparable harm to Us which could not adequately be compensated for in damages and in the event of such breach by You You hereby consent to an injunction being issued against You restraining You from
79. ta sets represented by various geographical locations across the world To select a rainfall station first click on the Rainfall button to bring up the following screen UJ Rainfall Stations ak Available Rainfall Stations State Prov Location Years Elev m Lat deg Lat min Long deg Long min Time min E o Alabama AUBURN AG RESRCH STN 10 214 Alabama BIRMINGHAM INT L AIRPORT Alabama HUNTS ILLE MADISON Alabama MOBILE REGIONAL AP Alabama MONTGOMERY DANNELLY Alabama TUSCALOOSA OLIVER DAM Alaska ANCHORAGE INTL AP Alaska FAIRBANKS INTL AP Alaska JUNEAU AIRPORT Alaska KING SALMON AP Alaska KODIAK WSO AIRPORT Alaska NOME WSO AIRPORT Alaska ST PAUL ISLAND AP Alaska YAKUTAT STATE AP d Fura EITMIINTTIM Search for Stations by State Prov Selected Rainfall Station Selected Location Add Station Modify Station Lal EY Selected State Prov Delete Station Create Lookup T able Done EEE E E E E E E E EJEJE E Dee Select the appropriate geographic location by scrolling through the list of available rainfall stations To expedite the search use the drop down menu at the bottom left of the window to narrow the search by Province or State Select a rainfall station from the displayed list under Available Rainfall Stations by clicking on the appropriate row and pressing Done By pressing Done the Rainfall Stations window will close and bring you back to the main screen STORMCEPTOR
80. tered as a depth over the entire respective area pervious or impervious Depression storage will either infiltrate in pervious areas and or be evaporated pervious and impervious areas 6 1 6 Mannings n Mannings n is a coefficient that represents the surface roughness of the area A small coefficient represents a smooth surface Impervious areas typically have much smaller coefficients than pervious areas since pavement is smoother and transports flow more quickly than grassed areas A small Manningsn will result in a higher surface flow velocity reducing the travel time for water to reach the Stormceptor faster hydraulic response The default impervious Mannings n is representative of concrete while the default pervious Mannings n is representive of grass 6 1 7 Infiltration Horton infiltration is used with the Sizing Program due to its simplicity recognizing that most applications would involve highly impervious drainage areas Horton infiltration requires a maximum infiltration rate rate of infiltration when if first starts to rain a minimum infiltration rate constant infiltration rate when the ground is saturated a decay rate and a regeneration rate Infiltration rate as a function of time without rain for several regeneration rate values is based on a maximum infiltration rate of 2 47 in h and a minimum infiltration rate of 0 39 in hr Higher decay rates translate into a soil which saturates more quickly reducin
81. the site Assumptions made for these models were based on studies by Sartor and Boyd 1972 Charbeneau and Barrett 1998 Novotny and Chesters 1981 and Tchobanoglous and Schroeder 1987 A detailed explanation of the design basis can be found in Appendix 3 6 1 12 Summary of Sizing Program Assumptions The following is a summary of Sizing Program assumptions made to simulate removal efficiencies e Width refers to the width of flow and not just the with of the area e The slope impervious and pervious depression storage Mannings coefficient of roughness maximum and minimum infiltration rate decay rate infiltration regeneration rate evaporation rate and dry weather flow default assumptions is presented in Table 6 1 e Stormceptor performance is based on a default maintenance schedule of once every twelve 12 months e Infiltration still exists during winter months e No winter sanding occurs although this can be accounted for in known circumstances e No flow control upstream although this can be accounted in the sizing of the Stormceptor unit e Performance estimates given by the program are for long term TSS removal efficiency and e Flocculated settling is used for particles equal to or less than 20 um 6 2 Site Conditions Typical applications for Stormceptor units are represented by the drainage areas identified as stable sites i e commercial sites residential infill sites industrial sites and gas st
82. to enter a customized PSD up to 20 different particle sizes Although the default PSD given in Table 5 1 is commonly accepted by most regulatory agencies in North America the user is cautioned to review the site location characteristics material handling practices and regulatory requirements when selecting a PSD STORMCEPTOR 28 Instruction Manual aS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior To size a unit based on particle sizes different from the fine or coarse particle distribution discussed above please contact your local Stormceptor Representative 5 5 Simulate Once all site parameters are entered and site conditions are appropriately considered in the Sizing Program the final step is to simulate the analysis for Stormceptor sizing To do this click the Simulate button The analysis will begin and the following screen will appear Hydrology amp 155 Simulation Calculating Hydrology and T55 Removal mm de Calculating foryear 1964 Once the analysis is completed in the main window the Stormceptor Sizing table will list off the performances of all the units for the site as seen below AL Stormceptor CD Sizing Program Exit Dimensions View Print Web About Help Ae JD Region Canada D Units Metric D Assumptions Calculations Rainfall Flow Control User s Manual Project Details Name Mini Fleet Centre Location Toronto Ontario Date July 30 2003 Project 77 Company Bou
83. too large error for impervious areas that exceed this value The program calculates continuous runoff from rainfall and simulates TSS build up and wash off from the design area TSS removal rates are estimated from the particle size distribution and settling rates using Stoke s Law Assumptions for slope depression storage evaporation rates build up and wash off parameters as well as the particle size distribution and settling rates are provided in Section 6 0 Users of the program should become familiar with these calculations and parameter values to ensure that they understand the applicability and limitations of this program For sites with special conditions please contact your local Stormceptor representative for assistance The Stormceptor representative can adjust inputs such as particle size STORMCEPTOR 8 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior distribution winter sanding slopes depression storages upstream detention storage and different loading functions to accommodate the site of interest Users should be familiar with the disclaimer regarding the use of this program 2 3 Minimum Specifications The minimum computer specifications required to install the Stormceptor CD Sizing Program version 4 0 0 is as follows Computer Pentium 2 with 450 MHz processor or the equivalent Memory 128 MB of RAM Operating System Windows 9X ME NT 2000 XP Video Card 16 MB Dri
84. turer s STORMCEPTOR 13 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior website Selecting this will bring you to the Stormceptor manufacturer s website About Displays information about the Sizing Program Help Opens the Stormceptor Sizing Program help window 4 2 Standard Toolbar The following is a brief explanation of the Standard Toolbar as seen below from the main window a ale S Units jus _ Assumpbons Calculations d Clears any existing data on the screen so that a new data file wm can be created Allows the user to open an existing input data file ail Allows the user to save the input file to a selected drive for future reference or use E Allows the user to save the output file to a selected drive for future reference or use Prints the Stormceptor sizing table Note that this function does not print out the output file To print the output file you must go to the main menu select Print and from the drop down menu select Print Output File Region Canada ei Allows user to select a design for a specific geographic region Asia Australia Canada Europe or United States Units fus EN Allows the user to select either Imperial US or Metric units Assumptions Opens a help window listing the program limitations STORMCEPTOR 14 Instruction Manual AS Stormceptor CD Sizing Program Version 4 0 0 Stormcevtor E Stormceptor S
85. up and washoff model and settling velocities for a specific gravity of 1 8 Table 4 shows the results for various size Stormceptors with a 2 ha drainage area The results are plotted in order of decreasing performance expectations The stations in Table 4 were selected to cover a wide geographic area provide rainfall on a 15 minute timestep with a 0 25 mm resolution and provide results representative of large nearby cities Most data from city airports are recorded hourly and therefore were not included in the comparison The results in Table 4 are plotted on Figure 5 Of the 16 stations analyzed 12 stations provided TSS removal estimates within 5 of the Toronto values STORMCEPTOR B 12 17 Instruction Manual Stormceptor CD Sizing Program Version 4 0 0 Appendix B Table 4 Regional Comparison of TSS Removal Performance 2ha Stormceptor Model CDN USA 1500 3000 5000 6000 State Province Colorado Alberta British Columbia California Massachusetts Ontario New South Wales New York North Carolina Queensland Minnesota California Maryland Missouri Florida Texas Location Fort Collins Calgary Forest Vancouver Davis East Brimfield Lake Toronto Sydney Rhinebeck Cataloochee Brisbane Le Sueur Orange County College Park Miller St Lucie New Lock Houston Addicks 300 750 450 900 49 63 48 63 48 65 44 61 43 99 43 98 42 57 41 57 41 56 41 55 41 56 39 57
86. ve Space 200 MB Minimum CD ROM 4x or better Audio No audio supported by software Internet TCP IP Internet STORMCEPTOR 9 Instruction Manual U Stormceptor CD Sizing Program Version 4 0 0 Stormcepior 3 0 INSTALLING amp UNINSTALLING 3 1 Installing the Sizing Program To install Stormceptor CD Sizing Program version 4 0 0 follow these simple steps Step 1 Start you computer s operating system turn your computer on Step 2 Insert the Stormceptor CD Sizing Program version 4 0 0 CD into your CD ROM drive The Autorun menu should appear Note If the Autorun menu does not automatically appear double click on the My Computer icon located on your desktop and then double click the icon that corresponds to your computers CD ROM drive The Autorun menu should now appear Step 3 Click the Next button Read the license agreement The license agreement must be accepted in order to continue with installation Click the Next button Step 4 Once you have created a directory for Stormceptor CD Sizing Program the software will automatically be installed on your hard drive When the installation is complete remove the CD from the CD ROM drive Step 5 IMPORTANT Users must also install Autodesk Voloview if they do Optional not have a CAD program and wish to view and print the CAD drawings from the Sizing Program The AutoDesk Voloview program has been bundled in the installer for the Sizing Program If the user chooses
87. velopment select the Flow Control button The following window shall appear D Upstream Quantity Flow Control Quantity Control Storage Number of Storage Points 1 Storage bam Flow cma D D Insert Row Before Highlight Insert Row After Highlight Sort Storage T able Upstream Flow Splitter External Upstream Flow By Pass Clear Done STORMCEPTOR 29 Instruction Manual SS Stormceptor CD Sizing Program Version 4 0 0 Stormcepior Enter the storage and flow for each storage point Quantity control is modeled through stage storage and stage discharge relationships by inputting the storage provided and the corresponding flow The following is an example of flow control at 5 storage points which means that storage exists at two junctions where the pipe diameter changes thus translating to 5 different flow rates IMPORTANT ENSURE THAT AT LEAST ONE ROW READS ZERO FOR STORAGE AND ZERO FOR FLOW 3 Upstream Quantity Flow Control Quantity Control Storage Humber of Storage Points Ea Insert Row Before Highlight Insert Aow After Highlight Sort Storage Table Upstream Flow Splitter External Upstream Flow By Pass Clear Done 5 2 2 Alternative 2 Upstream Flow Splitter The second alternative for flow control is upstream flow splitting This option is rarely used but is available for designers to consider should their conveyance system incorporate this feature As mentioned above upstr

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