| 12.5% Sodium Hypochlorite |
Chemical |
Disinfection of final effluent; odor control at primary and secondary clarifiers; algae control at secondary clarifiers; disinfection of reclaimed water; filament control in activated sludge. |
221,000 gallons |
06/30/11 |
06/30/12
|
$0.865/ gal
(~$191K)
|
Olin Chlor Alkali |
| 25% Sodium Bisulfite |
Chemical |
Neutralizes residual chlorine in the final effluent, prior to discharging into the SF Bay. |
109,000 gallons |
6/30/11 |
06/30/12 |
$1.135/ gal.
(~$124K) |
Basic Chemical Solutions |
| 41% Ferric Chloride |
Chemical |
Prevent formation of struvite (mineral deposits) in sludge de-watering piping and equipment; and enhance suspended solids removal in primary clarifiers during wet weather flows. |
125 dry tons |
6/30/11 |
06/30/12 |
$808.325/ dry ton (~$101K)
|
KemiraWater Solutions, Inc. |
| 50% Hydrogen Peroxide |
Chemical |
Oxidizing Agent, Controls odorous compounds in the wastewater as it enters the treatment plant. |
95,000 gallons |
06/30/11 |
06/30/12 |
$2.943/ gal
(~$280K)
|
US Perioxide |
| Calcium Nitrate |
Chemical |
Prevent formation of odorous compounds in collection system. |
96,000 gallons,
560,000 lbs of nitrate oxygen
|
6/30/12 |
|
$.661/ lb oxygen
(~$370 K) |
Siemens Water Technologies (U.S. Filter) |
| Emulsion Polymer @41%active |
Chemical |
Conditions anaerobically digested sludge for dewatering in high speed centrifuges and sludge thickening in DAFT's. |
125,000 wet lbs |
6/30/14 |
|
$1.291/ wet lb.
(~$161 K) |
SNF Polydyne, Inc. |
| Biosolids Disposal |
Service |
During wet weather season, biosolids are disposed of at the Redwood Landfill as alternative daily cover or co-compost. |
4,400 wet tons |
06/30/14
|
|
$33.6/wet ton
(~$148K)
|
Redwood Landfill, Inc. |
| Biosolids Hauling |
Service |
Remove de-watered biosolids from treatment plant and transport to landfill for alternative daily cover. |
7,200 wet tons |
6/30/14 |
|
$8.569/wet ton to Redwood Landfill;
$11.708/wet ton to land application
|
Total Waste Systems |
| Biosolids Land Application |
Service |
During dry weather months, beneficially re-use biosolids as a soil amendment for hay crops. |
2,800 wet tons |
12/31/14 |
|
$23.40 wet ton
(~66K) |
Synagro |
| Uniforms |
Service |
Operations, Maintenance, and Lab personnel are required to wear clothing provided by the Agency. This contract is for providing uniforms and laundry service. |
For 30 employees |
5/31/10 |
06/30/12 |
$14,397 |
Aramark |
