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HomeMy WebLinkAboutDomestic Water ReportCommercial Use Avg Demand (GPD) Peak Hourly Flow (GPH) Peak Flow (GPM) Retail 750 3,000 50 Restaurant 2,880 11,520 192 Total 3,630 14,520 242 January 10, 2011 Ms. Erika Bridges City of College Station 1101 Texas Avenue College Station, Texas 77842 Re: Domestic Water Report Southside Plaza Phase 2 4093 State Highway 6 South College Station, Texas Gessner Engineering Job No.: 10 -0548 Dear Ms. Bridges: The peak water demand was calculated in accordance with the B /CS Unified Design Guidelines for Domestic Water. The average flow was determined based on the Average Water Demands given in Table I of the Domestic Water manual and the Average Wastewater Generations given in Table III of the Sanitary Sewer manual by assuming a combination of retail (7,624 sf) and restaurant (4,800 sf) commercial use for the 12,424 square feet (sf) building. The average demand and peak hourly flow values are shown below in Table One. Table One: Average Flow Summary The average demand values were determined using Method 2 — Land Use Determination. A value of 750 gallons per day (gpd) was calculated for retail use by assuming 1.00 acre (60% of site) of retail use. (lacre) * (30 persons / acre) * (25gpd / cap) = 750gpd The peak water demand for retail use, based on the Peak Hourly Flow equation in the B /CS Unified Design Guidelines, was calculated to be 50 gallons per minute (gpm). A value of 2,880 gpd was calculated for restaurant use by assuming 4,800 sf (approx 40 %) of building use. 600gpd * 4,800sgft = 2,880gpd 1,000sgft The peak water demand for restaurant use was calculated to be 192 gallons per minute (gpm). N: \Gessner Eng Data 10 \10 -0548 Southside Plaza Ph 2 \Civil\DOC \10 -0548 Domestic Water Report.doc G Gessner Engineering 2501 Ashford Drive Suite 102 College Station, Texas 77840 P.O. Box 10763, 77842 979.680.8840 fax 979.680.8841 2204 S. Chappell Hill Street Brenham, Texas 77833 979.836.6855 fax 979.836.6847 There will be six different meters that will split the total flow between retail and restaurant use. The maximum continuous capacity of the 2" Sensus OMNI T water meter is 200 gpm, which is over the expected peak demand of the retail and restaurant use. The specification sheet for the Sensus OMNI T water meter is attached. Please contact us if you have any questions or if we can be of further assistance. Sincerely, GESSNER ENGINEERING, F -7451 JYA,Liv YofirutA- Melissa P. Thomas, P.E. Kyle M. Zapalac, M.E., E.I.T. OF T E * t it • * r %� • * �1 MELISSA P. THOMAS / 98398 1 G tv: wessner tng Data 1U\1u -UM8 SoutISlde Plaza Ph 2 \Livil\JUU \I04) S48 Domestic water Report.doc Gessner Engineering OMNI- 212 -R2 OMNI T' DESCRIPTION Model:The OMNIT meter operation is based on advanced Floating Ball Technology (FBT) with an operating range of 1.0 GPM (.23 m /hr) @ 95% min. to 250 GPM (57 m /hr) @ 100% +/- 1.5% registration of actual throughput.The meter is also rated for continuous flows up to 200 GPM (45 m /hr). Conformance to Standards: The OMNIT meter meets and far exceeds the most recent revision of ANSI / AWWA Standard C701 class II standards. Each meter is performance tested to ensure compliance. All OMNI meters are NSF Approved to the latest standards. Performance:The patented measurement principles of the OMNIT meter assure enhanced accuracy ranges, an overall greater accuracy, and a longer service life than any other comparable class meter produced.The T meter has no restrictions as to sustained flow rates within its continuous operating range.The floating ball measurement technology allows for flows up to its rated maximum capacity without affecting undue wear or accuracy degradation. Construction:TheT meter consists of two basic assemblies; the maincase and the measuring chamber. The measuring chamber assembly includes the "floating ball" impeller with a coated titanium shaft, hybrid axial bearings, integral flow straightener and an all electronic programmable register with protective bonnet.The maincase is made from industry proven Ductile Iron with an approved NSF epoxy coating. Maincase features are; easily removable measuring chamber, unique chamber seal to the maincase using a high pressure o -ring, testing port and a convenient integral strainer. OMNI Electronic Register:TheT electronic register consist of a hermetically sealed register with an electronic pickup containing no mechanical gearing. The large character LCD displays AMR,Totalization and a ResettableTestTotalizer. OMNI register features; AMR resolution units that are fully programmable, Pulse output frequency that are fully programmable, Integral customer data logging capability, Integral resettable accuracy testing feature compatible with AR -5000 Testing Assistant Program, Large, easy -to -read LCD also displays both forward and reverse flow directions and all with a 10 -year battery life guarantee. Magnetic Drive: Meter registration is achieved by utilizing a fully magnetic pickup system.This is accomplished by the magnetic actions of the embedded rotor magnets and the ultra sensitive register pickup probe.The only moving component in water is the "floating ball" impeller. Measuring Element:The revolutionary thermoplastic, hydro dynamically balanced impeller floats between the bearings.The Floating BallTechnology (FBT) allows the measuring element to operate virtually without friction or wear, thus creating the extended upper and lower flow ranges capable on only the OMNIT meter. 2" OMNIT AMR /AMI Mode Totalization Mode ResettableTest Mode Strainer:The OMNIT with the "V" shaped integral strainer using a stainless steel screen along with Floating BallTechnology (FBT) create a design that gives far improved accuracy even in those once thought questionable settings. A removable strainer cover permits easy access to the screen for routine maintenance. Optional drain ports, located at the back lower corners of the strainer body, allow for easy discharging of debris without the need to remove the cover. Maintenance:The OMNIT meter is designed for easy maintenance. Should any maintenance be required, the measuring chamber and / or strainer cover can be removed independently. Parts and or a replacement measuring chamber may be utilized in the event repairs are needed. Replacement and Measuring Chamber Exchange are available under the Sensus MMP Program for theT meters and this program may also be utilized for retrofitting to competitive meters to achieve increased accuracy and extended service life. AMR /AMI Systems: Meters and encoders are compatible with current SensusAMR/AMI systems. Guarantee: Sensus OMNIT Meters are backed by "The Sensus Guarantee" Ask your Sensus representative for details or see Bulletin G -500. Page 1 of 2 OMNI - 212 -R2 SERVICE OPERATING RANGE 2 T Pressure Loss Curve with Strainer C 14 0. 12 0 10 J 8 E 6 7 4 a 2 0. 0 01015 7 15 30 Meter and Normal DN 50mm .23 m /hr 57 m /hr SPECIFICATIONS MAXIMUM 200 PSI (13.8 bar) OPERATING PRESSURE sEnsus 50 Rate of Flow (GPM) 80 95% — 101.5% © 1.0 GPM (.23 m LOW FLOW MAXIMUM 200 GPM (45 m /hr) CONTINUOUS OPERATION MAXIMUM 250 GPM (57 m /hr) INTERMITTENT OPERATION PRESSURE 7.0 psi CO 200 GPM (.48 bar © 45 m LOSS 100 200 Direction _ of Flow F - Bolt Circle "`��� No. of Bolts H Size of Bolts DIMENSIONS AND NET WEIGHTS 250 2" 1.0 gpm 250 gpm Flanged 17" 7 -7/8" 1" 432mm 200mm 25mm Measure of potable water. Operating temperature range of 33 °F (.56 °C) — 150°F (65.6 °C). 100% ± 1.5% from 1.5 — 250 GPM (.34 — 57 m /hr) P.O. Box 487 1 450 North Gallatin Avenue Uniontown, PA 15401 USA T: 1- 800 - 638 -3748 F: 1- 800 -888 -2403 www.sensus.com /water h2oinfo @sensus.com 102 • 101 100 O • 99 g 98 u 97 < 96 95 01015 Pipe Size Operating Range Connections A B C D E REGISTER 2" T Accuracy Curve Maincase Strainer Screen Dimensions NSF APPROVED MATERIALS 7 15 30 50 80 100 Rate of Flow (GPM) F G 5-3/4" 2 -5/16" 4 -1/2" 2 146mm 59mm 114mm 2 FLANGE 2" U.S. ANSI B16.1 / AWWA Class 125 CONNECTIONS Maincase: Measuring Chamber: Rotor "Floating Bali ": Radial Bearings: Thrust Bearings: Magnets: Strainer Screen: Strainer Corer. Test Plug: 200 250 Net Shipping H J Weight Weight 3/4' 1 -1/2" 27.4 lbs. 34.5 lbs. 19mm 40mm 12.42 kg 15.65 kg. Fully electronic sealed register with programmable registration (Gal. /Cu.Ft! Cu. Mtr. / Imp.Gal / Acre Ft) Programmable AMR/AMI reading and pulse outputs Guaranteed 10 year battery life Coated Ductile Iron Thermoplastic Thermoplastic Hybrid Thermoplastic Sapphire /Ceramic Jewel Ceramic Magnet Stainless Steel Coated Ductile Iron Coated Ductile Iron AUTHORIZED SENSUS DISTRIBUTOR Page 2 of 2 101.5 98.5