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Home My WebLink AboutCDS 2015-4 Specs. and Calc. SheetsPLAN VIEW B-BN.T.S.FIBERGLASS SEPARATIONCYLINDER AND INLETCENTER OF CDS STRUCTURE, SCREEN ANDSUMP OPENINGPVC HYDRAULIC SHEARPLATE2'-0" [610](2'-0" [610])1'-9" [533](4'-6" [1372])ELEVATION A-AN.T.S.FIBERGLASS SEPARATIONCYLINDER AND INLETSOLIDS STORAGE SUMPSEPARATIONSCREENINLET PIPE(MULTIPLE INLET PIPESMAY BE ACCOMMODATED)OUTLET PIPEPVC HYDRAULICSHEAR PLATE(4'-0" [1219])FLOWPERMANENT POOLELEV.OIL BAFFLE SKIRTCONTRACTOR TO GROUTTO FINISHED GRADEGRADERINGS/RISERSAA48" [1219] I.D. MANHOLESTRUCTURETOP SLAB ACCESS(SEE FRAME AND COVERDETAIL)VARIES +/-135°MAX.FLOW+/-65°MAX.BBFRAME AND COVER(DIAMETER VARIES)N.T.S. FOR MAINTENANCE CALL 1.800.33 8 . 1 1 2 2 www.contechES.comTMCl ean water starts here®800-338-1122 513-645-7000 513-645-7993 FAX9025 Centre Pointe Dr., Suite 400, West Chester, OH 45069CDS2015-4-C ONLINE CDSSTANDARD DETAIL\\AD.CONTECH-CPI.COM\ROOT\STORMWATER\JURISDICTIONS\USA\MA\_SDE DESIGN TOOLS\_STANDARD DETAILS\CDS2015-4-C-DTL.DWG 8/6/2018 4:22 PMTHIS PRODUCT MAY BE PROTECTED BY ONE OR MORE OF THEFOLLOWING U.S. PATENTS: 5,788,848; 6,641,720; 6,511,595; 6,581,783;RELATED FOREIGN PATENTS, OR OTHER PATENTS PENDING.STRUCTURE IDWATER QUALITY FLOW RATE (CFS OR L/s)PEAK FLOW RATE (CFS OR L/s)RETURN PERIOD OF PEAK FLOW (YRS)SCREEN APERTURE (2400 OR 4700)PIPE DATA:I.E.MATERIALDIAMETERINLET PIPE 1INLET PIPE 2OUTLET PIPESITE SPECIFICDATA REQUIREMENTSWIDTHHEIGHTANTI-FLOTATION BALLASTNOTES/SPECIAL REQUIREMENTS:RIM ELEVATION* PER ENGINEER OF RECORD****************CDS2015-4-C DESIGN NOTESCDS2015-4-C RATED TREATMENT CAPACITY IS 1.4 CFS, OR PER LOCAL REGULATIONS.THE STANDARD CDS2015-4-C CONFIGURATION IS SHOWN. ALTERNATE CONFIGURATIONS ARE AVAILABLE AND ARE LISTED BELOW. SOMECONFIGURATIONS MAY BE COMBINED TO SUIT SITE REQUIREMENTS.GENERAL NOTES1.CONTECH TO PROVIDE ALL MATERIALS UNLESS NOTED OTHERWISE.2.FOR SITE SPECIFIC DRAWINGS WITH DETAILED STRUCTURE DIMENSIONS AND WEIGHT, PLEASE CONTACT YOUR CONTECH ENGINEEREDSOLUTIONS LLC REPRESENTATIVE. www.ContechES.com3.CDS WATER QUALITY STRUCTURE SHALL BE IN ACCORDANCE WITH ALL DESIGN DATA AND INFORMATION CONTAINED IN THIS DRAWING.CONTRACTOR TO CONFIRM STRUCTURE MEETS REQUIREMENTS OF PROJECT.4.STRUCTURE SHALL MEET AASHTO HS20 LOAD RATING, ASSUMING EARTH COVER OF 0' - 2', AND GROUNDWATER ELEVATION AT, OR BELOW,THE OUTLET PIPE INVERT ELEVATION. ENGINEER OF RECORD TO CONFIRM ACTUAL GROUNDWATER ELEVATION. CASTINGS SHALL MEETAASHTO M306 AND BE CAST WITH THE CONTECH LOGO..5.IF REQUIRED, PVC HYDRAULIC SHEAR PLATE IS PLACED ON SHELF AT BOTTOM OF SCREEN CYLINDER. REMOVE AND REPLACE ASNECESSARY DURING MAINTENANCE CLEANING.6.CDS STRUCTURE SHALL BE PRECAST CONCRETE CONFORMING TO ASTM C-478 AND AASHTO LOAD FACTOR DESIGN METHOD.INSTALLATION NOTESA.ANY SUB-BASE, BACKFILL DEPTH, AND/OR ANTI-FLOTATION PROVISIONS ARE SITE-SPECIFIC DESIGN CONSIDERATIONS AND SHALL BESPECIFIED BY ENGINEER OF RECORD.B.CONTRACTOR TO PROVIDE EQUIPMENT WITH SUFFICIENT LIFTING AND REACH CAPACITY TO LIFT AND SET THE CDS MANHOLE STRUCTURE.C.CONTRACTOR TO INSTALL JOINT SEALANT BETWEEN ALL STRUCTURE SECTIONS AND ASSEMBLE STRUCTURE.D.CONTRACTOR TO PROVIDE, INSTALL, AND GROUT INLET AND OUTLET PIPE(S). MATCH PIPE INVERTS WITH ELEVATIONS SHOWN. ALL PIPECENTERLINES TO MATCH PIPE OPENING CENTERLINES.E.CONTRACTOR TO TAKE APPROPRIATE MEASURES TO ASSURE UNIT IS WATER TIGHT, HOLDING WATER TO FLOWLINE INVERT MINIMUM. IT ISSUGGESTED THAT ALL JOINTS BELOW PIPE INVERTS ARE GROUTED.GRATED INLET ONLY (NO INLET PIPE)GRATED INLET WITH INLET PIPE OR PIPESCURB INLET ONLY (NO INLET PIPE)CURB INLET WITH INLET PIPE OR PIPESCONFIGURATION DESCRIPTIONwww.contechES.com Project:Lot 2 - Route 6A Location:Yarmouth Port, MA Prepared For:JM O'Reilly & Assoc / Bob Reedy Purpose: Reference: Procedure: where: A = impervious surface drainage area (in square miles) WQV = water quality volume in watershed inches (1" in this case) Structure Name Impv. (acres) A (miles2) tc (min) tc (hr) WQV (in)qu (csm/in.)Q (cfs) WQU #1 0.14 0.0002188 5.0 0.083 1.00 795.00 0.17 WQU #2 0.87 0.0013594 5.0 0.083 1.00 795.00 1.08 The WQf sizing calculation selects the minimum size CDS/Cascade/StormCeptor model capable of operating at the computed WQf peak flowrate prior to bypassing. It assumes free discharge of the WQf through the unit and ignores the routing effect of any upstream storm drain piping. As with all hydrodynamic separators, there will be some impact to the Hydraulic Gradient of the corresponding drainage system, and evaluation of this impact should be considered in the design. qu = the unit peak discharge, in csm/in. To calculate the water quality flow rate (WQF) over a given site area. In this situation the WQF is derived from the first 1" of runoff from the contributing impervious surface. Massachusetts Dept. of Environmental Protection Wetlands Program / United States Department of Agriculture Natural Resources Conservation Service TR-55 Manual Determine unit peak discharge using Figure 1 or 2. Figure 2 is in tabular form so is preferred. Using the tc, read the unit peak discharge (qu) from Figure 1 or Table in Figure 2. qu is expressed in the following units: cfs/mi2/watershed inches (csm/in). Compute Q Rate using the following equation: Q = (qu) (A) (WQV) Q = flow rate associated with first 1" of runoff Area 0.14 ac WQU #1 Weighted C 0.9 66 tc 5 min Particle size 0 CDS Model 2015-4 1.4 cfs CDS Hydraulic Capacitycfs Rainfall Intensity1 (in/hr) Percent Rainfall Volume1 Cumulative Rainfall Volume Total Flowrate (cfs) Treated Flowrate (cfs) Incremental Removal (%) 0.08 35.3%35.3%0.01 0.01 34.1 0.16 23.8%59.1%0.02 0.02 22.9 0.24 12.9%72.0%0.03 0.03 12.4 0.32 7.8%79.8%0.04 0.04 7.5 0.40 4.9%84.7%0.05 0.05 4.6 0.48 3.5%88.3%0.06 0.06 3.3 0.56 1.7%90.0%0.07 0.07 1.6 0.64 1.8%91.8%0.08 0.08 1.7 0.72 1.9%93.7%0.09 0.09 1.7 0.80 0.9%94.6%0.10 0.10 0.8 1.00 2.3%96.9%0.13 0.13 2.1 2.00 2.9%99.8%0.25 0.25 2.4 3.00 0.2%100.0%0.38 0.38 0.2 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 95.4 0.0% 100.0% 95.4% 1 - Based on 14 years of 15 minute precipitation data from NCDC station 3821, Hyannis, in Barnstable County, MA 2 - Reduction due to use of 60-minute data for a site that has a time of concentration less than 30-minutes. Predicted Net Annual Load Removal Efficiency = Predicted % Annual Rainfall Treated = BASED ON THE RATIONAL RAINFALL METHOD BASED ON AN AVERAGE PARTICLE SIZE OF 50 MICRONS LOT 2 - ROUTE 6A Removal Efficiency Adjustment2 = CDS ESTIMATED NET ANNUAL SOLIDS LOAD REDUCTION Rainfall Station # YARMOUTH PORT, MA Unit Site Designation CDS Treatment Capacity Area 0.87 ac WQU #2 Weighted C 0.9 66 tc 5 min Particle size 0 CDS Model 2015-4 1.4 cfs CDS Hydraulic Capacitycfs Rainfall Intensity1 (in/hr) Percent Rainfall Volume1 Cumulative Rainfall Volume Total Flowrate (cfs) Treated Flowrate (cfs) Incremental Removal (%) 0.08 35.3%35.3%0.06 0.06 33.2 0.16 23.8%59.1%0.13 0.13 21.7 0.24 12.9%72.0%0.19 0.19 11.4 0.32 7.8%79.8%0.25 0.25 6.7 0.40 4.9%84.7%0.31 0.31 4.0 0.48 3.5%88.3%0.38 0.38 2.8 0.56 1.7%90.0%0.44 0.44 1.3 0.64 1.8%91.8%0.50 0.50 1.3 0.72 1.9%93.7%0.56 0.56 1.3 0.80 0.9%94.6%0.63 0.63 0.6 1.00 2.3%96.9%0.78 0.78 1.4 2.00 2.9%99.8%1.57 1.40 0.8 3.00 0.2%100.0%2.35 1.40 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 0.00 0.0%100.0%0.00 0.00 0.0 86.4 0.0% 99.6% 86.4% 1 - Based on 14 years of 15 minute precipitation data from NCDC station 3821, Hyannis, in Barnstable County, MA 2 - Reduction due to use of 60-minute data for a site that has a time of concentration less than 30-minutes. Predicted Net Annual Load Removal Efficiency = Predicted % Annual Rainfall Treated = BASED ON THE RATIONAL RAINFALL METHOD BASED ON AN AVERAGE PARTICLE SIZE OF 50 MICRONS LOT 2 - ROUTE 6A Removal Efficiency Adjustment2 = CDS ESTIMATED NET ANNUAL SOLIDS LOAD REDUCTION Rainfall Station # YARMOUTH PORT, MA Unit Site Designation CDS Treatment Capacity