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SR0080739 SSNL
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Last modified
11/6/2019 4:59:54 PM
Creation date
11/6/2019 4:37:21 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2600 - Land Use Program
FileName_PostFix
SSNL
RECORD_ID
SR0080739
PE
2602
FACILITY_NAME
JAHANT WOOD CELLARS
STREET_NUMBER
1525
Direction
E
STREET_NAME
JAHANT
STREET_TYPE
RD
City
ACAMPO
Zip
95220
APN
00314012
ENTERED_DATE
6/13/2019 12:00:00 AM
SITE_LOCATION
1525 E JAHANT RD
P_LOCATION
99
P_DISTRICT
004
QC Status
Approved
Scanner
TSok
Tags
EHD - Public
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S 1 <br /> Soil Suitability/Nitrate Loading Study Addendum Letter <br /> Lange Twins Winery h Acampo, California Irerracon <br /> May 21, 2019 u.. Terracon Project No. NA197005 <br /> Average Daily Flow Rates (Max Flow x # Days used per year/ 365 days per year <br /> For the purpose of the nitrate loading analysis, a long term average daily flow rate was calculated <br /> for the facility. During standard operating hours the long term average daily flow for the existing <br /> facility is 313.86 gpd and 1,031.51 gpd during peak hours. The proposed development is <br /> anticipated to add an additional average daily flow rate of 403.95 gpd during standard operating <br /> hours or 481.30 gpd during peak hours. The special events are anticipated to add an additional <br /> 54.79 average daily flow. Therefore, the average daily flow for the facility is anticipated to be <br /> 772.60 gpd during standard operating hours or 1,567.61 gpd during peak hours. <br /> The average total nitrogen concentration of domestic wastewater is normally considered to be 20 <br /> to 85 mg/L-N with 35 to 45 mg/L-N being typical (Crites and Tchobanoglous, 1998). It is estimated <br /> that commercial use will have higher concentrations of total nitrogen when compared to residential <br /> use. The 2005 NOA SSNLS reported the average total nitrogen concentration of wastewater was <br /> reported at 60 mg/L-N for the winery facility with 25% denitrification factor. Terracon recommends <br /> an average concentration for total nitrogen in wastewater for the winery operations is <br /> approximately 85 mg/L-N over the long term and 45 mg/L-N for the residence. Deep percolation <br /> of rainfall was estimated to be 4.49 inches per year. <br /> Nitrate Loading <br /> A nitrate loading scenario was performed for each building with a septic tank to determine the <br /> impact of the existing facility and proposed development. The scenario utilizes the variables <br /> discussed previously which represent the estimated conditions and uses associated with this <br /> project. The following table presents a summary of the nitrate loading calculation for the site <br /> based on the highest average daily flow rates for each the facility buildings with septic tanks. A <br /> copy of the nitrate loading calculation is included in the Attachments. <br /> Table 3. <br /> Summary of Nitrate Mass Balance Equation. <br /> Result Effluent Deep <br /> Septic Leachfield <br /> Tank Land Use <br /> (Nc)* Acres `Average Daily Concentration Denitrification Percolation <br /> No. (mg/L- (A) Flow(Q)(gpd) (Nw) (d) of Rainfall <br /> N) (mg/L-N) (R)(in) <br /> 1 Truck South 1.3 41.38 70.32 85 25% 4.49 <br /> Restroom <br /> 2 Caretaker 1.7 41.38 280 45 25% 4.49 <br /> House <br /> 3 Bottling 2.2 41.38 275.03 85 25% 4.49 <br /> Building <br /> 4 Building#1 1.5 41.38 112.51 85 25% 4.49 <br /> 5 Tasting Room 2.3 41.38 293.65 85 25% 4.49 <br /> Responsive ■ Resourceful ■ Reliable 6 <br />
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