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North Carolina Surface Water Analysis

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Presentation on theme: "North Carolina Surface Water Analysis"— Presentation transcript:

1 North Carolina Surface Water Analysis
Julia Cavalier, P.E. Public Water Supply Section

2 Surface water reporting
Raw, settled CFE turbidity Raw coliform Alkalinity, pH Chemicals fed Daily plant flow

3 Statewide surface water data
(insert map here)

4 2016 average raw water turbidity

5 2016 average coagulant dose

6 Cape Fear Basin plants (insert Cape Fear map here)

7 Cape Fear Basin Water system Plant name Source description
Coagulant category Fayetteville PWC Hoffer Run of river Ferric Glenville Dunn A B Uzzell Alum + poly Harnett County Reservoir Bladen Bluffs Brunswick County Northwest PaCl + poly Cape Fear PUA Sweeney Pender County

8 Feb 2016 Cape Fear Plants Turbidity spikes a few days apart for upstream and downstream plants. Starts 2/3/16 Fayetteville -2/6/16 Wilmington, 2/16/16-2/19/16 2/3/ in rain in Fayetteville 2/4/ in rain in Fayetteville 2/ in Fay

9 Feb 2016 Lower Cape Fear Intakes
Brunswick Co, Wilmington, and Pender County have intakes at Lock and Dam #1. Lower Cape Fear WASA has pipe into river. Wilmington also has open channel Kings Bluff pump station. Pender Co draws off of LCFWASA pipe.

10 Coagulant dose

11 Raw Water pH

12 Raw water alkalinity

13 Further research Inter and intra basin comparisons of turbidity trends
Relationship between coagulant dose and raw water alkalinity and pH. Any differences between coagulant strategy?

14 Questions? Julia Cavalier (919)

15 Additional trends examined
Raleigh: Dissolved oxygen Chlorophyll TOC Raw streaming current OWASA: Lake level and algae level Raw iron and manganese Annual chemical use Annual treatment and process water

16

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