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SR0084952_SSNL
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2600 - Land Use Program
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SR0084952_SSNL
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Last modified
4/14/2022 1:33:15 PM
Creation date
4/14/2022 1:24:03 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2600 - Land Use Program
FileName_PostFix
SSNL
RECORD_ID
SR0084952
PE
2602
STREET_NUMBER
11880
Direction
E
STREET_NAME
ADA
STREET_TYPE
AVE
City
STOCKTON
Zip
95215
APN
10328033
ENTERED_DATE
3/4/2022 12:00:00 AM
SITE_LOCATION
11880 E ADA AVE
P_LOCATION
99
P_DISTRICT
004
QC Status
Approved
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EHD - Public
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CONCLUSIONS AND RECOMMENDATIONS <br />In summary, the soil conditions examined near the proposed septic system drain fields <br />on each new parcel were found to be suitable for standard septic systems utilizing leach <br />lines with seepage pits. Satisfactory soil percolation rates of 19.2 min/in (Parcel 1) and <br />7.8 min/in (Parcel 2) were observed in the shallow soil zones at the test locations. The <br />soil in the test locations was found to be clay at the surface, underlain by partially <br />cemented silt/sand/clay mixtures. <br />The depth of ground water based on recent aquifer levels is approximately 115 to 125 <br />feet below ground surface. The ground -water flow is to the northeast at a rate of <br />approximately 4 to 11 feet per mile. <br />No wells are located on the Site; no water sample was collected as part of this <br />investigation. Based on maps reviewed, neither nitrate nor DBCP appear to be a <br />common problem in the area. <br />Based on the methods and assumptions described, the nitrate loading calculations <br />indicate that future on-site septic tanks and drain field systems on the Site have the <br />potential to cause a buildup of nitrate in the aquifer up to 9.7 mg/L-N (Parcel 1) or 9.0 <br />mg/L-N (Parcel 2), less than the maximum drinking water standard of 10 mg/L-N. <br />Consequently, no nitrate mitigation is recommended at this time. <br />LOGE 2208 Page 14 <br />
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