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SU0004267 SSNL
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SU0004267 SSNL
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Last modified
11/19/2024 10:19:59 AM
Creation date
9/4/2019 6:04:04 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2600 - Land Use Program
FileName_PostFix
SSNL
RECORD_ID
SU0004267
PE
2632
FACILITY_NAME
PA-0300093
STREET_NUMBER
7890
Direction
W
STREET_NAME
ELEVENTH
STREET_TYPE
ST
City
TRACY
APN
25015004
ENTERED_DATE
5/17/2004 12:00:00 AM
SITE_LOCATION
7890 W ELEVENTH ST
RECEIVED_DATE
3/19/2003 12:00:00 AM
P_LOCATION
99
P_DISTRICT
005
QC Status
Approved
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SJGOV\rtan
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\MIGRATIONS\E\ELEVENTH\7890\PA-0300093\SU0004267\NL STDY.PDF
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EHD - Public
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June 11 2003 <br /> Job Number:LG03-137 <br /> Page 8 <br /> The formula, assumptions and calculations used for the analysis are shown on"Plates 4and 5. The ' <br /> units of nitrate used in the mass.balance equation are nitrate-N whose maximum drinking water <br /> contaminate level.is 1.0 mg/L. These variables are discussed next. <br /> 6.2 Quantity and Qgality of Septic System Effluent <br /> We understand that the numbers.both of office employees and customers will be relatively low <br /> due.to the-nature of the RV sales. Office workers are expected to total 1; working an eight-hour <br /> shift Monday through Saturday. Customers are estimated to be five(5)per.day or less for an -. <br /> eight.-hour day, Monday through Saturday. <br /> The various classes of employeesand customers are delineated in the table below. <br /> Table 6. <br /> Total estimated average daily flow rate of the septic system. <br /> Line Total <br /> User Category Use Rate Scale <br /> ork Week Persons " ` 'allda J erson Factor*** allda <br /> Office Staff 13-* 617 11.1 C <br /> _ (Mon-Sat) �-3 <br /> Customers(Mon-Sat) 5 ��7** 6/7 7.3 2{ <br /> Grand Total: 18.4 <br /> * <br /> From Crites and Tchobanoglous, 1998! <br /> #� Assume low now toilet fixture, 1.7 gallons per-flush per visit. , <br /> *** Scale factor to account for different work weeks;6/7 is a six-day week.. <br /> The wastewater generated by the facility is essentially from the toilet. Well water will supply, <br /> pp Y. <br /> the initial water supply-arid will contain some nitrate in it,as well. An estimate of the <br /> concentration of total nitrogen from this source is estimated to range between 20-80 nig/L-N with <br /> r a typical average of 35 mg/L N (Crites and Tchobanoglous, 1998).. This estimate-for a residential <br /> home which is assumed to be similar to a small business with few employees and customers.. <br /> The well.water contains about 6. ng/L-N(or'76 mg/L as NO3)nitrate which should be <br /> factored into the use. The value of 35 mg/L-N was assumed to reflect the average concentration <br /> of the total nitrogen in the waste water for the proposed project. To estimate the affect of the <br /> - added nitrate in the well water, the values were simply added together-, 35 mg/L-N added to 16.8 <br /> mg/L-N(76 mg/L,as'NO3). The estimated Nw value is 51.8 mg/L-N." <br /> ' o � <br />
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