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SR0056541 SSNL
Environmental Health - Public
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SR0056541 SSNL
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Entry Properties
Last modified
1/7/2020 1:16:25 PM
Creation date
9/4/2019 10:11:36 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2600 - Land Use Program
FileName_PostFix
SSNL
RECORD_ID
SR0056541
PE
2602
FACILITY_NAME
BULL FROG MARINA
STREET_NUMBER
17247
STREET_NAME
BACON ISLAND
STREET_TYPE
RD
City
STOCKTON
Zip
95219
APN
12917013
ENTERED_DATE
2/17/2009 12:00:00 AM
SITE_LOCATION
17247 BACON ISLAND RD
P_LOCATION
99
P_DISTRICT
003
QC Status
Approved
Scanner
SJGOV\sballwahn
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FilePath
\MIGRATIONS\B\BACON ISLAND\17247\NL STDY.PDF
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EHD - Public
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rNLS§ 4.2, SSS§ 6.7. From the soil test results, it appears that nitrate-nitrogen concentrations have <br /> increased under the existing leachlines in comparison to nearby virgin soil. Given the soil <br /> conditions, there is almost assuredly a fair degree of denitrification potential, otherwise, the nitrate- <br /> nitrogen concentration in the soil under the leachlines would probably be much higher. Of greater <br /> importance is the on-site shallow well water analyses, which reveals nitrate to be non-detect. This <br /> well is 66 feet types deep. In other soil t es and in areas that are not next to bodies of water, nitrate <br /> concentrations would most likely be found in these wells. iTlie`o(pth&the peat soils must be, <br /> preventing;by denitrification;the downward�iiigratioii of nitrate along with dilution from fresh <br /> water: <br /> SSS§ 6.8. The Average Daily Flow is calculated toeb' 37�, 7Y als/day from the facility. With a <br /> mound system basal area of 30 ft x 85 feet= 2,550 ft' the sail-ef erg" terface should accept the <br /> anticipated average daily flow. A Lori erm Acceptance Rat of 0.155als/ft2/day gives an ADF <br /> of: 2,550 fe x 0.15 gals/ftz/day 383 d. 0.15 gallons is equ - 1.2 pints, or 2.4 cups. <br /> NLS§ 4.1. The nitrate loading potential calculated on Page 12 indicates the percolating effluent may <br /> have a resultant nitrate-nitrogen concentration of 9.5 ppm, which is below the drinking water <br /> �1 Maximum Contaminant Level (MCL).f Consequeritly,the,nitrate-diet may form from.the recharge <br /> effluerit.watei will1theoretically be denitrified as it migrates downward. <br /> As referenced it is imperative that all food and all food by-product wastes articular) <br /> including fats oils andgrease) from the Manager's Apartment and the future Food <br /> Preparation/Bar area be handled as solid wastes and not be disposed of into the septic <br /> system. In addition, water usage from all fresh water sources must be.kept to an <br /> absolute minimum especially from the future Food Preparation/Bar area. The manager <br /> of the facility will ensure these procedures are followed and will contract with an <br /> future owners of the facility that they must abide by these procedures. All parties must <br /> be made aware of the monitoring of the wastewater flow meter. FHD will also be <br /> monitoring this flow meter. <br /> Th_e wastewater disposal'system installer mu-Si insure that proper grade`s are established and <br /> ,maintained'for.the mound system'. In the referenced Finnemore and Hantzsche paper, they discuss <br /> ,three.opt ons to consider as po'tential,methods of reducing the water.table ` rhounding"phenomenon. <br /> The=first-is.--increasing"the size-of`the-disposal-field:jBased upon the average daily flow calculations <br /> found on Page 9, it is-anticipated 1961disposal_area is sufficient.in size to accommodate the.projected <br /> flow�volumes'after-compl-etibn� The disposal area is based on mathematical computations for sizing <br /> found in the EPA Desi n Manual - On Site Wastewater Treatment and Disposal Systems. <br /> The second method is elongating the shape of.the area covered by the disposal field, and orientating <br /> .the mound perpenidicular,to groundwater directional flow.::M"hoted on the design plans, the mound <br /> system-;is.elongated in a 2.8:1Wlength7to-width ratio and.it is orientated north-to-south. Groundwater <br /> flow is approximately east-to=west based on the orientation of the land surface to Middle River. <br /> Thirdly;-operating the field-intermittently should_decrease-:the.mounding effect.-As noted in this <br /> Report,.effluent-will_be.pumped by two alternating-pumps that will-pump small doses of <br /> approximately-75•gallons-per dose. <br /> s <br /> 19 <br /> Chesney Consulting <br /> E <br />
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