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HomeMy WebLinkAboutCorrespondences Page 1 of 2 Erika Bridges - Re: lakeridge 2a ...�� From: Erika Bridges To: Morgan, Veronica Date: 9/8/2011 5:30 PM Subject: Re: lakeridge 2a Attachments: Water Demands.pdf Veronica, One more thing...I was just looking at "Exhibit 6" from the original Fire Flow Report (see attached) and my calculations for the Average Demands don't seem to jive with the 0.6 gpm /unit. Is there an updated table that I'm missing? Thanks, Erika »> "Veronica Morgan" <v @mitchellandmorgan.com> 9/8/2011 10:47 AM »> Erika, You commented on please use historical usage or fixture units to calculate the water and sewer demands. Here is how I calculated the unit demand... 100 gpcd *4 persons per unit (these are mostly 3 and 4 bedroom units in this phase) /12 hours /60min /hr = 0.6 gpm ( the distribution is over 12 hours not 24 b/c of the nature of students) And peaked *4 = 2.4 gpm The wastewater is similar using 80 gpcd instead of 100 so 80 *4 =320 gpd and peak 320 *4 = 1280 gpd peak Is this the information you need? Please call to discuss. Thanks Veronica Veronica J.B. Morgan, P.E., C.F.M. Managing Partner . • an, LLP 511 University Dr. E Suite 204 College Station, TX 77840 Tel (979)260 -6963 Fax (979)260 -3564 CONFIDENTIALITY NOTE This e-mail and any files transmitted with it contain privileged and confidential information and are intended solely for the use of the individual file: / /C: \Documents and Settings \ebridges \Local Settings \Temp \XPgrpwise \4E68FBBCCity ontli $ Page 1 of 2 Erika Bridges - Re: lakeridge 2a From: Erika Bridges To: Morgan, Veronica Date: 9/8/2011 5:21 PM Subject: Re: lakeridge 2a Veronica, It looks like the water demands are appropriate. On the wastewater, please justify using 80 gpcd rather than 100 gpcd. Thanks, Erika Erika Bridges, EIT, CFM Graduate Civil Engineer Department of Public Works 1101 Texas Ave. College Station, TX 77842 Phone: 979.764.3570 Fax: 979.764.3496 ebridges@cstx.gov * * * * * * * * * * * * * * * * * * ** City of College Station Home of Texas A &M University »> "Veronica Morgan" <v @mitchellandmorgan.com> 9/8/2011 10:47 AM >» Erika, You commented on please use historical usage or fixture units to calculate the water and sewer demands. Here is how I calculated the unit demand... 100 gpcd *4 persons per unit (these are mostly 3 and 4 bedroom units in this phase) /12 hours /60min /hr = 0.6 gpm ( the distribution is over 12 hours not 24 b/c of the nature of students) And peaked *4 = 2.4 gpm The wastewater is similar using 80 gpcd instead of 100 so 80 *4 =320 gpd and peak 320 *4 = 1280 gpd peak Is this the information you need? Please call to discuss. Thanks Veronica Veronica J.B. Morgan, P.E., C.F.M. Managing Partner file: / /C: \Documents and Settings \ebridges \Local Settings \Temp \XPgrpwise \4E68F98FCity of 0511 St Page 2 of 2 Mitchell & Morgan, LLP 511 University Dr. E Suite 204 College Station, TX 77840 Tel (979)260 -6963 Fax (979)260 -3564 ..,........** ....******......**********... *.. * ........ . .......... *.........*......* ** *CONFIDENTIALITY NOTE This e-mail and any files transmitted with it contain privileged and confidential information and are intended solely for the use of the individual or entity to which they are addressed. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any dissemination or copying of this e-mail or any of its attachment(s) is strictly prohibited. If you have received this e-mail in error, please immediately notify the sending individual or entity by e-mail and permanently delete the original e-mail and attachment(s) from your computer system. file: / /C: \Documents and Settings \ebridges \Local Settings \Temp \XPgrpwise \4E68F98FCity of 061 S1