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Discharge Permit
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Non-expiring permit issued to property in the name of the property
owner, allowing the discharge of effluent.
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Discharge Limit
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Volumetric limit to amount of effluent allowed to be discharged by the
septic system permitted.
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Distribution Laterals
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Plastic pipes installed at the top of the sand and gravel bed in a sand
filter. Wastewater is distributed through 1/8" to 3/16" orifices in these
laterals to the mixed media bed.
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Diversion Valve
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Valve installed between the septic tank and leachfields, so that
property owner can switch fields to allow a resting cycle for one field
while the other field is dosed.
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Failure
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A wastewater disposal system which is discharging in violation of the
District's Wastewater Code or a wastewater disposal system whose
components do not meet the specifications of the Code.
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Gravel Filter
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A specially designed bed of gravel that can pre-treat commercial
wastewater prior to disposal in a leachfield.
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Gravity System
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A leachfield that relies on gravity flow of effluent.
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Inlet Tee
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A sanitary tee or baffle installed at the inlet to the septic tank to
facilitate quiescent inlet conditions.
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Leachfield
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Area (typically a trench) filled with gravel for the disposal of septic
tank effluent. The wastewater is typically delivered by perforated
pipe to the disposal area.
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Outlet Tee
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A sanitary tee or baffle for retaining scum in a septic tank.
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Repair Order
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Notice alerting property owner of system maintenance required.
Discharge Permit is conditioned on compliance with repair order.
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Retention Time
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Length of time sewage effluent is retained in the septic tank.
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Sand Filter
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A specially designed bed of sand and gravel that pre-treats septic
tank effluent prior to disposal in a leachfield.
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Septic Tank
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Water tight container for the retention of sewage prior to disposal.
The tank is typically sized to contained three days of sewage
effluent.
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Tightline
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A non-perforated pipe between a septic tank and leachfield.
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