HomeMy WebLinkAboutARCH-0161-2019 04 Sewer and Water Generated_July 20201413 Monterey St.
San Luis Obispo, CA 93401
www.ashleyvance.com
SAN LUIS OBISPO • SANTA BARBARA • LOS ANGELES • OAKLAND • BEND
Memorandum Page 1 of 1
Date: 6/22/2020
Project: French Hospital
To: Corissa Burnett
City of San Luis Obispo
Utilities Department
Job #: 181474
Subject: Preliminary Sewer and Water Generated by New Hospital Tower and Parking Structure
Comments:
Below are the estimated water and sewer rates generated by the new structures. Please note, a new meter and
sewer lateral will be constructed to serve the new construction.
Hospital Tower
Fixture Units GPM
Working Fixture Units 865 242
Drainage Fixture Units 758 379
Parking Structure
Fixture Units GPM
Working Fixture Units 37.5 43
Drainage Fixture Units 33 16.5
For your reference, please refer to the attached document showing the existing sewer main flows provided by Miguel
Barcenas, City Utilities Engineer.
Note: PWW = Peak Wet Weather (worst case due to I/I)
PDW = Peak Dry Weather
The estimated gpms were obtained by converting the proposed fixture units using the plumbing code conversion
charts and factors.
Below is chart A-3 from the plumbing code appendix A which converts working fixture units to GPM for water
demand.
Drainage fixture units are converted using plumbing code 702.3 Continuous Flow which states that every 2 fixture
units equate to 1GPM.
Regards,
Juan Alvarez
(805) 545-0010 x.156