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SU0004970 SSNL
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PA-0500185
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SU0004970 SSNL
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Last modified
5/7/2020 11:31:22 AM
Creation date
9/4/2019 5:29:48 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2600 - Land Use Program
FileName_PostFix
SSNL
RECORD_ID
SU0004970
PE
2622
FACILITY_NAME
PA-0500185
STREET_NUMBER
451
STREET_NAME
DIETRICH
STREET_TYPE
RD
City
LINDEN
APN
10521020 &
ENTERED_DATE
4/6/2005 12:00:00 AM
SITE_LOCATION
451 DIETRICH RD
RECEIVED_DATE
4/5/2005 12:00:00 AM
P_LOCATION
99
P_DISTRICT
004
QC Status
Approved
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SJGOV\rtan
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\MIGRATIONS\D\DIETRICH\451\PA-0500185\SU0004970\NL STDY.PDF
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EHD - Public
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1 <br /> (§ 31,3.2,3.3 and 3.4) The on-site septic system for the Welch's residence has been functioning <br /> properly without any problems since it was installed in 1980. The permit for this system is found in <br /> Appendix D.which illustrates the system to consist of leachlines and seepage pits. On the Tentative <br /> Map for the project, a septic system is shown for the referenced secondary structure to the west of <br /> the primary residence. This is only a storage shed and there is no septic system for this structure. <br /> (§ 3.4) The subject property is in an area designated as "Hardpan"by EHD's colored map denoting <br /> the various soil types and septic system requirements throughout the County. (§ 5.4) Therefore, <br /> since the water table is deep in this area at approximately 122 feet, and the fact that the soil structure <br /> can be insufficient for proper effluent management, seepage pits and sumps are allowed to be <br /> installed in this area. <br /> (§3.5 and 3.6) A review of Application Permits on file with the Environmental Health Department <br /> reveals there have been three Applications for Repairs/Additions to septic systems on Eastern <br /> Heights Road and none on Dietrich Road within the study area. There have been 10 Applications <br /> for Repair/Additions on Hewitt Road., one mile to the east. (§ 5.4) This can be considered a high <br /> i number of Repairs/Additions/Replacements, and can be attributed to the indigenous clay soil type, <br /> l particularly to the north and east of the subject property. Consequently, the majority of effluent <br /> volume is managed by sumps or seepage pits in this area. <br /> (§ 5.1 and 6.0) SOIL PROFILE AND PERCOLATION TESTING <br /> (§ 5.1 and 5.2) As noted on the USDA Soil Survey map, the entire on-site soils consists of Madera <br /> sandy loam (#193). Typically, this soil types are moderately drained with very slow permeability in <br /> depths below 40 inches. As discussed below, the shallow perc test boring on Parcel 1 and the deep <br /> (9 -11 ft) test borings on Parcels 3 and 4 had unacceptable percolation. The maximum acceptable <br /> perc rate is 60 min/in for shallow perc tests and 30 min/in for the deep tests. <br /> (§ 5.2 and 5.3) Logs of Boring designated by the Unified Soil Classification System (USCS) soil <br /> classifications as observed from each of the perc test borings are found on the respective EHD <br /> PERCOLATION TEST DATA SHEETS. Generally, the soils show variability within the shallow <br /> subsurface soils of the property. Silty clay is found in the shallow soils under the north half of the <br /> property, and a fine sandy silt under the south half of the property. Below five feet, the soils are <br /> generally a clayey/silt with some gravel as observed in a 25 ft deep exploratory boring on Parcel 4. <br /> For Parcels 1 and 2, a fine sandy silt/silty sand was encountered in the deep percolation test depths <br /> represented on the Perc Test Data Sheet (8 ft and 12.5 ft, respectively). Consequently, the <br /> percolation tests were set within this stratum where permeability is favorable. <br /> Percolation testing was conducted on proposed Parcels 1, 2, 3 and 4 as illustrated on the Tentative <br /> Map found in Appendix C. These location maintains sufficient distance between future septic <br /> systems that may be installed and surrounding wells. The perc test location for Parcel 1 was <br /> contingent upon the existing well location and structures. <br /> Page -2- <br /> Chesney Consulting <br />
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