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Cary / Apex

Plant treatment capacity

Initial - 60,000m³/d; phase 1 - 90,000m³/d; phase 2 - 150,000m³/d

Plant storage capacity

30,000m³

Flocculator clarifier capacity

30,000m³/d per unit

Filters

10 x multi-media filters

Disinfection

Initial - ozone; final - ammonia and chlorine

Fluoride addition

1ppm

Project cost

$70 million

<b>Water Quality<b>

<b>(Raw Water / Treated Water)<b>

Iron (mg/l)

0.151 / 0.029

Manganese (mg/l)

0.277 / 0.012

Calcium (mg/l)

n/a / 8.48

Magnesium (mg/l)

n/a / 2.20

Sulphate (mg/l)

n/a / 25.1

Chloride (mg/l)

15.3 / 10.5

Dissolved Solids (mg/l)

n/a / 75

Hardness (mg/l)

33.1 / 30.25

Total phosphorus (mg/l)

0.03 / 0.05

Turbidity (NTU)

3.97 / 0.29

pH (pH units)

6.9 / 7.2

Faecal coliforms (per100ml)

333 / 0

Plant opened

1993

Expansion programme agreed

1999

Contract awarded

October 1999

Pipeline construction completed

January 2001

Reclaimed water system in service

June 2001

Phase 1 completed

April 2002

Phase 2 completed

August 2002

Water Safety Award

January 2004

Plant joint owners

Towns of Cary and Apex

Plant operator

Cary Public Works & Utilities Department

Consulting engineers

Camp, Dresser and McKee

Main contractor

Crowder Construction

Flocculator clarifier suppliers

Ondeo Degremont (formerly Infilco Degremont)

Electrical work

Bryant Electric

Pipeline construction

Rockdale Pipeline Inc

Other contractors

Dellinger, Acorn Industrial
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