Cooling Tower. i. OC Public Works/Facilities Operation personnel will make a twice weekly check of the cooling tower water to determine the effectiveness of the treatment to control scale, algae, fungi and bacteria free operation and equipment corrosion protection, unless there is an issue which requires more frequent testing. Tests include PH, total hardness, total alkalinity, conductivity, free and total halogen and inhibitor levels. ii. Equipment and chemical protection against scale and corrosion shall contain all of the following: a) PBTC/HEDP Phosphonate (to provide anodic and cathodic mild steel corrosion protection) b) Benzotriazole or Tolyltriazole (TT or BZT) (to provide copper corrosion protection c) High Stress Polymer (to provide calcium, iron and silt control), Polymer shall be non-foaming and non-Ionic d) Fluoresced inert and active trace element (to facilitate ease of testing). Product shall not contain any molybdenum (due to the County’s desire for no heavy metal discharge) iii. Current system control limits (based on best practices and current product use): a) Conductivity: 2,200 to 2,600 mmhos b) Cycles (Tower to City): 4.5 to 6.0
Appears in 1 contract
Sources: Contract for Water Treatment Chemicals and Related Services
Cooling Tower. i. OC Public Works/Facilities Operation personnel will make a twice weekly check of the cooling tower water to determine the effectiveness of the treatment to control scale, algae, fungi and bacteria free operation and equipment corrosion protection, unless there is an issue which requires more frequent testing. Tests include PH, total hardness, total alkalinity, conductivity, free and total halogen and inhibitor levels.
ii. Equipment and chemical protection against scale and corrosion shall contain all of the following:
a) PBTC/HEDP Phosphonate (to provide anodic and cathodic mild steel corrosion protection)
b) Benzotriazole or Tolyltriazole (TT or BZT) (to provide copper corrosion protection
c) High Stress Polymer (to provide calcium, iron and silt control), Polymer shall be non-foaming and non-Ionic
d) Fluoresced inert and active trace element (to facilitate ease of testing). Product shall not contain any molybdenum (due to the County’s desire for no heavy metal discharge)
iii. Current system control limits (based on best practices and current product use): a) Conductivity: 2,200 to 2,600 mmhos b) Cycles (Tower to City): 4.5 to 6.0
Appears in 1 contract
Sources: Contract for Water Treatment Chemicals and Related Services