HomeMy WebLinkAbout20151873.tiff Account Number
003103-01 Meter Readings Readings Dates
Description Previous Present Usage Read Code Previous Current
1000 Gallons 0 0 0 Actual 6/20'2014 7/22/2014
Previous Balance $1650
Payment Received ($16.50)
Water Minimum Charge S16.50
Total Current Charges $16.50
Total Due $16.50
CUSTOMER
Don&Evelyn Shaffer
SERVICE ADDRESS
22930 County Rd 39
Weer ACCOUNT NUMBER BILUNGDATE
Consumption
003103-01 0731,14
AMOUNT DUE DUE DATE
$16.50 08/10.'14
SUINGPERIOD-
From 07,01/14 lo 07/3 1'14 = 30 Days
CENTRAL WELD COUNTY WATER DISTRICT
A M J J 2235 2nd Avenue
Greeley,CO 80631
970-352-1284
PRESORTED
FIRST CLASS MAIL
CENTRAL WELD COUNTY WATER DISTRICT US POSTAGE PAID
GREELEY CO
2235 2nd Avenue PERMIT NO. 74
Greeley,CO 80631
Don& Evelyn Shaffer
1811 26 St
Greeley,CO 80631
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<�`�� `"`.''� ALLES TAYLOR AND DUKE, LLC
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3610 35th Avenue, Suite No. 6 Evans, Colorado 80620
(970)330-0308
October 24, 2014
Mr. Edward Holloway
22390 Weld County Road 39
LaSalle, CO 80645
Subject: Conversion of Residential OWTS
to Commercial Application at 22390 WCR 39
Job No. 2014-201
Mr. Holloway,
The scope of work for this project is the evaluation of an existing residential onsite wastewater treatment
system (OWTS) design, serving a residential application at the subject address, by review of existing Weld
County Department of Public Health and Environment (WCDPHE) documents. The existing residence is
proposed to be converted to a commercial application as a trucking company office and shop. This evaluation
of existing documents is to determine if the existing design and installation is large enough to support the
proposed change of use. Because the system was just installed in June of this year, we do not believe that
a site visit is warranted. The evaluation of the system will be performed by reviewing the existing design
information and finaled permit.
An existing OWTS was permitted on June 23, 2014, and installed in July of 2014. The installed system
consists of a 1,000 gallon, concrete, two-compartment septic tank, followed by a distribution box discharging
to a soil treatment area bed containing 20 Infiltrator Quick4 chambers. The system operates by gravity flow.
No shop floor drains will discharge to the OWTS.
The complement of the proposed trucking business will be as follows:
Commercial Trucking Business Wastewater Flow Estimate
Wastewater Number of Percent Contributing WW Flow Per Total WW
Generator People Contributing Personnel Person (GPD) Flow (GPM)
Truck Drivers 23 0.5 11.5 5 58
Mechanics 2 1.0 2 15 30
Managers 3 1.0 3 5 15
Misc. Clients 5 1.0 5 5 25
Total 128
Percolation Rate= 15 MPI
LTAR= 0.8
STA= GPD/LTAR X 1.2 X 0.7= 128 GPD/0.8 X 1.2 X 0.7= 134.4 SF
#of Chambers= Area/12 SF Per Chamber= 134.4/12= 11.2 Chambers
Number of Chambers Installed= 20 Chambers
October 24, 2014
Job No. 2014-201, Page 2
The wastewater load for the facility has been calculated using the flows from Table 30-6-2 of the Weld County
Chapter 30 OWTS Regulations as adopted July 1, 2014. The flows indicated in the table above are
conservative, as the three managers are actually part of the group of 25 Truck Drivers, but do some office
work, so have been broken out separately. The number of truckers using the facilities each day has been
estimated high, and a full 5-gallon load has been used to estimate their contribution, even though each flush
will be less than 1.6 gallons.The two mechanics have been estimated as contributing the full 15 GPD/Person,
and 5 clients have been added, even though it is our understanding that the facility will have only a few clients
come to the office per year.
The septic tank for the commercial facility must provide a minimum of 2-days retention time for the
wastewater, and have at least 400-gallons capacity, with two-compartments per the new regulations;
therefore, the 1,000-gallon, concrete, two-compartment tank installed is adequate for the new application.
Considering that the OWTS is new, and that it is sized for almost double the anticipated wastewater load, it
is our professional opinion that the system, as installed, is sufficient in size to support the proposed
commercial activity.
If there are questions, or if you would like additional information, please feel free to contact us at the
numbers/address below.
e /{AN6�A2 4-poie655
Thank you, S/6-A✓
Sincerely,
Reviewed By:
OA/ /17 it--
Robert W. Wright, PE Mark A. Taylor, PE!
Senior Civil Engineer Principal
Alles, Taylor & Duke, LLC
3610 W. 35th Ave, Unit#6
Evans, CO 80620
Phone: 970-330-0308
Fax: 970-352-0128
E-Mail: alles taylor duke(@yahoo.com
cc: Ms. Sheri Lockman, Lockman Land Consulting
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