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Home My WebLink AboutCT 00-06; BRESSI RANCH MASTER; SANITARY SEWER RPT 400-8B; 2002-10-01SANITARY SEWER REPORT BRESSI RANCH INDUSTRIAL CT 00-06 DRAWING Np. 400-8B^ CARLSBAD, CA^ OCTOBER 2002 Prepared For: LENNAR COMMUNITIES c/o LENNAR BRESSI VENTURE, LLC 5780 Fleet Street, Suite 320 Carisbad, CA 92008 Prepared By: PROJECTDESIGN CONSULTANTS PlAMUmG • ENVIKONMUNTAJ. • ENGtlVEEIUNG 701 B Street, Suite 800, San Diego, CA 92101 619-235-6471 FAX 619-234-0349 • St;K\'EY/GPS Job No. 2244.00 Grego Shields RCE 42951 Registration Expires 07/15/03 Prepared By: Checked By: KLM BDS TABLE OF CONTENTS Page 1.0 INTRODUCTION 1 2.0 DESCRIPTION OF STUDY AREA 1 3.0 PROPOSED SANITARY SEWER IMPROVEMENTS 1 4.0 ESTIMATED SEWAGE FLOW 3-4 5.0 DESIGN CRITERIA 5 6.0 DESIGN FLOW AND HYDRAULIC CALCULATIONS 5-7 7.0 CONCLUSION 8 FIGURES 1 Location Map 2 TABLES 1 Total Equivalent Dwelling Units per Planning Area 4 2 Industrial Build-Out Projects 4 3 Sewer System Calculations - System A 6 4 Sewer System Calculations - System B 7 APPENDICES A Handbook of Hydraulic Tables B LFMP Non-Residential Build-Out Projections C Unit Flow Generation Factors ATTACHMENTS Exhibit A - Sewer System REPORT/2244SSR-IND.DOC jj 1.0 INTRODUCTION This sanitary sewer report has been prepared to document the fmal design and supporting calculations for the sewer system associated with the proposed development of Bressi Ranch Phase Industrial within the City of Carlsbad, and in accordance with City of Carlsbad standards. 2.0 DESCRIPTION OF STUDY AREA The industrial portion of the property, with a total acreage of approximately 129.5 acres, is located southeast of the intersection of El Camino Real and Palomar Airport Road in the City of Carlsbad, Califomia. Please refer to the location map on Page 2. The site consists of an irregular- shaped piece of property bordered on the north by Palomar Airport Road, on the west by El Camino Real, on the south by Bressi Ranch Residential, and on the east by the Rancho Carrillo development. 3.0 PROPOSED SANITARY SEWER IMPROVEMENTS The site is divided into two separate sewer collection systems: System A and System B (see attached Exhibit A). System A begins at El Fuerte Street and extends westerly in Gateway Center Drive, and easterly in Gateway Center Court. System A ties into the existing El Fuerte Street system per Bressi Ranch CT 00-06 and Drawing Number 400-8E. System B begins at Town Garden Road and extends northerly through Planning Area 2 to Gateway Center Drive. This system extends both east and west along Gateway Center Drive and branches off at Innovation Way. System B ties into the existing sewer system at Town Garden Road per Bressi Ranch CT 00-06 and Bressi Ranch Residential (Dwg. No. 400-8). REPORT/2244SSR-IND.DOC PROJECT SITE N i HTS 5 o CL \jr~MELROSE V DRIVE ^POINSETTIA LANE EL EUERTE STREET FIGURE 1. LOCATION MAP 4.0 ESTIMATED SEWAGE FLOW The sanitary sewer systems for Bressi Ranch Industrial are proposed to carry the wastewater from the 1,979,880 square feet of industrial/office space proposed to be developed in Bressi Ranch Industrial (see Appendix B for Non-Residential Build-Out Projections). These systems will connect to proposed sewer mains in El Fuerte Street and Town Garden Road. In order to provide adequate capacity of the sewer systems, the maximum industrial square footage as determined in the Bressi Master Plan has been converted to equivalent dwelling units (EDUs). Per Table 5-1, Appendix C, the maximum conversion is 1,800 square feet equals one EDU. See Tables 1 and 2 for the total EDUs per planning area. REPORT/2244SSR-IND.DOC TABLE 1: PHASE II EQUIVALENT DWELLING UNITS PER PLANNING AREA PLANNING GENERAL PLAN NET AREA MAX. BLDG. S.F. RESIDENTIAL EQUIVALENT TOTAL AREA DESIGNATION ACRES IDENTIFIED IN D.U. EDU'S EDU'S BRESSI RANCH MASTER PLAN* 2 PI 14.1 208,300 -116 116 3 PI 47.0 695,027 -386 386 4 PI 44.0 650,664 -361 361 5 PI 27.7 409,623 -228 228 14 PI 1.1 16,267 -9 9 TOTAL 0 1,100 1,100 * Master Plan Idenfified a total of 2,160,500 building square footage for Planning Areas 1-5 & 14. The following table summarizes the building areas per Planning Area: TABLE 2: INDUSTRIAL BUILD OUT PROJECTIONS Planning Net Area (Acres) Percent Total Building Sq. Ft. Area Area 1 2.5 1.7% 36,970 2 23.8 16.3% 351,950 3 47.0 32.2% 695,027 4 44.0 30.1% 650,664 5 27.7 19.0% 409,623 14 1.1 0.8% 16,267 Total 146.1 100.00% 2,160,500 5.0 DESIGN CRITERIA The criteria used in the design of the sewer system are established within the City of Carlsbad design requirements, Standard Sewer Svstem Design Criteria, May 1993. The following is a brief summary from the above-mentioned standards: Where D = Flow Depth, and d = pipe diameter: 8-inch diameter pipe: 1. Maximum Depth at Peak Flow = Vi pipe diameter (0.33 feet); or D/d < 0.50 2. Minimum Pipe Slope = 0.40%; desirable = 0.50% 3. Minimum Sewage Flow Velocity = 2 feet/second 4. Peaking Factor = 2.5 5. Residential Sewage Generated = 220 gallons/EDU/day 6. Pipe Roughness Coefficient 'n' = 0.011 for PVC pipe 7. Maximum sewer depth, fmish grade to top of pipe, shall be 15 feet. Sewer with depths greater than 15 feet shall be class C900 pipe and require approval from the City Engineer. 6.0 DESIGN FLOW AND HYDRAULIC CALCULATIONS The estimated flow in each reach of 22 sewer pipelines proposed for Bressi Ranch Industrial are shown in Tables 3 and 4 for sewer Systems A and B, respectively. The flows generated in each pipeline reach are compared to the design criteria described in Section 5.0. REPORT/2244SSR-IND.DOC Table 3 - Sewer System Design Flows and Calculations (See Exhibit A) SYSTEM A Pipe to. Ail'" : Peak' Factor Q (Desien) D(iii) D/d A=CW V(fps) Pipe to. Ail'" : Peak' Factor GPD D(iii) D/d A=CW V(fps) 22-21 31 6,820 2.50 17,050 0.026 0.030 0.011 8 0.0049 0.0726 0.0256 0.011 : 52 21-AH* 61 13,420 2.50 33,550 0.052 0.019 0.011 8 0.0122 0.1118 0.0481 0.021 2.43 20-19 108 23,760 2.50 59,400 0.092 0.015 0.011 8 0.0244 0.1558 0.0781 0.035 2.65 19-18 148 32,560 2.50 81,400 0.126 0.014 0.011 8 0.0346 0.1848 0.0998 0.044 2.84 18-17 188 41,360 2.50 103,400 0.160 0.011 0.011 8 0.0495 0.2207 0.1287 0.057 2.80 17-AH* 237 52,140 2.50 130,350 0.202 0.036 0.011 8 0.0345 0.1846 0.0997 0.044 4.55 Sewer System A connects to access hole per Dwg. No. 400-8E. REP\13255SSR.DOC Table 4 - Sewer System Design Flows and Calculations (See Exhibit A) SYSTEM B Pipe Aii to . ••••AH.' 'I D.U. Demand Peak If'actor Q (l>esign) D(in) D/d A=Cad^ V(fps) Pipe Aii to . ••••AH.' 'I D.U. Demand Peak If'actor G1»D -CFS ; D(in) D/d A=Cad^ V(fps) 16-15 88 19,360 2.50 48,400 0.075 0.020 0.011 8 0.0170 0.1311 0.0608 0.0270 2.7 15-14 156 34,320 2.50 85,800 0.133 0.020 0.011 8 0.0304 0.1736 0.0912 0.0406 3.2 14-8 224 49,280 2.50 123,200 0.191 0.008 0.011 8 0.0692 0.2611 0.1633 0.0726 2.6 13-2 62 13,640 2.50 34,100 0.053 0.011 0.011 8 0.0163 0.1285 0.0590 0.0262 2.0 12-11 40 8,800 2.50 22,000 0.034 0.060 0.011 8 0.0045 0.0697 0.0240 0.0107 3.1 11-10 80 17,600 2.50 44,000 0.068 0.046 0.011 8 0.0103 0.1030 0.0427 0.0190 3.5 10-9 120 26,400 2.50 66,000 0.102 0.014 0.011 8 0.0280 0.1668 0.0861 0.0383 2.6 9-8 160 35,200 2.50 88,000 0.136 0.052 0.011 8 0.0194 0.1396 0.0665 0.0296 4.6 8-7 384 84,480 2.50 211,200 0.327 0.051 0.011 8 0.0470 0.2149 0.1240 0.0551 5.9 7-6 412 90,640 2.50 226,600 0.350 0.050 0.011 8 0.0509 0.2238 0.1313 0.0583 6.0 6-5 440 96,800 2.50 242,000 0.374 0.045 0.011 8 0.0573 0.2375 0.1428 0.0635 5.9 5-4 468 102,960 2.50 257,400 0.398 0.025 0.011 8 0.0818 0.2844 0.1840 0.0818 4.8 4-3 496 109,120 2.50 272,800 0.422 0.045 0.011 8 0.0646 0.2523 0.1555 0.0691 6.1 3-2 524 115,280 2.50 288,200 0.446 0.042 0.011 8 0.0706 0.2639 0.1657 0.0737 6.0 2-1 686 150,920 2.50 377,300 0.584 0.008 0.011 8 0.2119 0.4747 0.3674 0.1633 3.5 1-AH* 802 176,440 2.50 441,100 0.682 0.020 0.011 8 0.1567 0.4008 0.2942 0.1307 5.2 * Sewer System B connects to access hole per Dwg. No. 400-8. REP\13255SSR.DOC 7.0 CONCLUSION It was determined that an 8-inch PVC pipe was suitable to carry the service flow without exceeding the criteria of depth of peak flow < !/2 pipe diameter or D/d < 0.5. The pipes' minimum velocity requirement of 2 fps was maintained, as well as the minimum slope of 0.40%. Sewer depth ranges from 6 feet to 18 feet maximum. Depths greater than 15 feet require approval from the City Engineer and use C-900 pipe. REPORT/2244SSR-IND.DOC APPENDIX A HANDBOOK OF HYDRAULIC TABLES REPORT/2244SSR-PI.DOC .STtADV UNirOnM FLOW IN OPEN CHAK.Ni:i.S 7-.!.') Tabic 7-4. For Determining Ihc Area o of Ihc Cross .Section of a Circular Conduit Flowing Part Full Ul _ ^kod C. - tb« UbuUud v»lue. Thfo < - Cd'. D t .00 .01 M .01 .04 .01 .08 .03 .09 .0 .OOOO .001] .0017 .0080 .0103 .0147 .Oltl .0242 .0294 .0130 .1 .04 0« .Oi70 .0U4 X800 JW88 J>7]« .0811 .0883 X»8I .1039 .2 .IIIB .IIB9 .1181 .1101 .Mit .1811 .1823 .1711 .1800 .1890 J .1083 .M74 .2187 J160 .UM .34MI .2348 J64] .2>3< J818 .< .mt J033 JIM JS» .1128 J428 J377 J6z; .1727 J827 .» .101 .411 .121 .411 .411 .431 .462 .472 .482 .6 .401 .M2 311 .811 .811 .840 .330 .330 .389 .378 .7 .(87 SM .aos .OH .821 .612 .640 .649 .637 .886 .8 .671 .est .e» .897 .701 .712 .71* .723 .712 .718 .» .7 IS .7M .788 .781 .786 .771 .778 .779 .7*2 .784 Tabic 7-U. Valgea of K' for Circular Channels in the Formula n - — jflijH n D — deptb ol vmUr d — dUmcUr o( cbMDcl D 4 .00 .01 .02 .01 .04 .03 .06 .07 .08 .09 .0 .00007 .00011 .00074 .00118 .00222 .00178 .00433 .C0C04 xo;73 .1 .00967 .0118 .0142 i)ior .0193 .0223 .0237 .OISI M77 .0166 .2 .1X06 .0448 .0492 .0337 .0383 .0014 .0088 .0118 .0791 .0849 .1 .0907 .09CS .1027 .1089 .1131 .1X18 .1284 .1132 .1120 .1490 .4. .1361 .1611 .1703 .1779 .1834 .1929 .2003 .7082 .2160 .2238 .3 .211 -JIO' .247 Mi .261 .271 .279 .787 .1(3 .301 .« .111 .119 .127 Jll .141 .330 .338 JC6 .373 .180 .» .]•• .193 .402 .409 .416 .422 .429 .433 .441 .447 .a .43) .438 .461 .488 .471 .477 .481 .413 .488 491 9 .4VI .<«0 .497 .498 .498 .498 .496 .<1I4 .189 .48) 1.0 .<«) APPENDIX B LFMP NON-RESIDENTIAL BUILD-OUT PROJECTIONS REPORT/2244SSR-PI.DOC APPENDIX B LFMP NON-RESIDENTIAL BUILD-OUT PROJECTIONS REPORT/2244SSR-P1.DOC EXHIBIT 12 ZONE 17 - LFMP NON RESIDENTIAL BUILD OUT PROJECTIONS CCNCRAL PLAN LANDltSC DESIGNATION BRESSt RANCH MASTER PLA.N PLANNING AREA NET DEVELOPABLE ACRES NON-RESIOENTIAL LANDUSE INTENSITY ESTIMATE MAXIMUM SO-FT. ALLOWED BY LANDUSE INTENSITY MAXlMltDM SQ.PT. IDENTI|i|Ci> m BRtSSt RANCH ft4AST£R PLAN (IIP) BUILDOUT PROJECTIONS (!) EXISTINC 3Q.rr. APPROVIO SQ-TT. ESTIMATEO FLTURE SQ.rr CF/P PA 13 11,6 177.72S l>8,000 ISgjOOO 0.0 0.0 138,000 CI/P TOTAL U.6 1,188.5 l3liOM 219fiS5 130,000 I30.0OO 0.0 mi 0.0 (1) Thi) ool umtt icjiTeaent) those non-i«3ldemial square footages identifnd in the Biml Raoeh Muter Plan. Exact square fooCi^ xtaz not IdentlOed for til plinniag arva within thc Mister Plan Wheic Ihis occun. the otuiinttiin square fooUge allowed uai calculated based cn Qtowlb Manigemem procedures. (2) The Build Out Projections is the maximtiin square foatagB allowed wilhin Zone 17 based on the Bressi Ranch Master Ptoo OT Orowih Minaiemenl. 0) Total or2,I6O,S0O squore Ieel. whiuK equsm to 13,000 AOT based an an issamptioa of 40H Light ladustiiil. 40% Research and Development and Office. This breakdown or uses was us«d for tiiiric moiling purpose). The pcruentagei of the vaiiaus iisei may ray tt Ihe lime of developmenl as iong a the tcafTie genented by the uses in Planning A reas 1,2. }. 4 and j does sot exceed IS.000 ACT (4) Represettts the pottron of thr RH/LA^F zone available for non-midentlal development, A minimum of }.] acres within the same planning area would be needed for Ihr development of 100 high deivsity res'idenlia] units. Mny 10. 2002 DRAFT-Zone 17 LFMP APPENDIX C UNIT FLOW GENERATION FACTORS REPORT/2244SSR-PI.IX)C Table 5-1 .*- j"^i^:^.t:^K^/^j4... .... . . General To coDvert Equivalent Dwelling Units to flow assume 220 gallons per day average flow. Commercial Property To convert raw land to square feet ofbuilding space assume 30 percent coverage. To convert improved pads to square feet of building space assume 40 percent coverage. To convert square feet of a building to Equivalent Dwelling Units assume 1,800 square feet per EDU. Industrial Property To convert raw land to square feet ofbuilding space assume 30 percent coverage. To convert improved pads to square feet ofbuilding space assume 40 percent coverage. To convert square feet of building to Equivalent Dwelling Units assume 60 percent of space is warehouse and 40 percent is office. For warehouse space 5,000 square feet equals one EDU and for office 1,800 square feet equals one EDU. I . i I / ..'•1 46