Treatment Alternatives
Alternative Designation T1 Description Treatment Quality Class C+ (same as current) Class C Notes Increase the capacity of the existing plant at the existing site Increase capacity of the existing plant such that it can produce 3 mgd of Class C effluent Increase the capacity of the existing plant. Upgrade a portion to produce Class B effluent Increase the capacity of the existing plant. Upgrade a portion to produce Class A effluent Increase capacity of the existing plant. Upgrade it such that it can produce 3 mgd of Class B effluent Replace existing plant to produce 3 mgd of Class C effluent Capital Cost million $ $34.9
Upgrade Existing Plant
T2
$34.9
T3
Class C+ and Class B Class C+ and Class A Class B
adds filtration
$36.7
T4
adds filtration & redundancy adds filtration
$37.1
T5
$37.3
T6
Class C, total P < 3mg/L and total N less than 10 mg/L Class C and B adds filtration
$39.3
New Plant at or Near Existing Site
T7 T8 T9 T10 T11
Replace existing plant to produce Class C effluent. Upgrade a portion to Class B level Replace existing plant to produce Class C effluent. Upgrade a portion to Class A level.
$41.1
Class C and A
adds filtration & redundancy adds filtration adds filtration & redundancy adds filtration and chemical treatment
$41.6
Replace existing plant to produce 3 mgd of Class B effluent
Replace existing plant to produce 3 mgd of Class A effluent Replace existing plant to produce 3 mgd of Class B effluent with total phosphorus less than 0.1 mg/L and total nitrogen less than 10 mg/L. Replace existing plant to produce 3 mgd of Class A effluent with total phosphorus less than 0.1 mg/L and total nitrogen less than 10 mg/L. Replace existing plant to produce 3 mgd of Class B effluent with total phosphorus less than 1 mg/L and total nitrogen less than 10 mg/L.
Class B Class A
$41.8 $42.5 $43.8
T12
T13
Class B with total P < 0.1 mg/L & total N < 10 mg/L adds filtration and Class A with chemical total P < 0.1 treatment, and mg/L & total N redundancy < 10 mg/L Class B with adds filtration, total P 1 mg/L & chemical total N < 10 mg/L treatment
$46.0
$43.6