2. Agenda
1. Overall project progress
2. Groundwater (GW) Treatment & Disposal
Alternatives
3. Surface Water Treatment Plant Assessment
4. Updated treatment costs & schedule
5. Questions
2

3. Well Field Piping
 Completed design: June 28, 2011
 Bids Received: August 12, 2011
 Contractor: Price Construction, LTD
 NTP: October 4, 2011
 Current Status: Construction is 95% complete
3

4. Transmission Main
 Completed design: August 12, 2011
 Bids Received: September 23, 2012
 Contractor: Oscar Renda Contracting
 Delay in approval and release of funds by TWDB
 NTP: January 23, 2012
 Current status: Construction activities are
underway
4

5. Booster Pump Station & Well Field
 Completed design: February 29, 2012
 Design approved by TCEQ & TWDB: April 2012
 Bids Received: May 1, 2012
 Contractor: Archer Western Construction LLC
 Status: COSA Approval
 NTP: June 11, 2012 pending final approval and
release of funds by TWDB
5

6. Groundwater Treatment
 Ion Exchange (IX) pilot testing 100% complete
 Reverse Osmosis (RO) pilot testing 95%
complete
 Surface Water Treatment Plant Assessment
completed for incorporation of new facilities
 Final design will commence upon selection of
treatment/disposal alternative
6

7. Groundwater Treatment Background
 Single-use Ion Exchange (IX)
• Previous pilot testing for groundwater indicated that
single use ion exchange is a viable technology for
removing radium
• Pilot tests showed that O&M costs were higher than
what was suggested by the manufacturers
• Results suggested evaluating other treatment
technologies like RO
 Reverse Osmosis
• Pilot Plant investigations started in January 2012
7

8. Treatment Alternative 1: Single-Use
Ion Exchange (IX)
Pretreatment Ion Exchange (IX)
Phosphate
Finished Water
(99% Recovery)
Well Granular Spent Disposal to
Media Resin Licensed Facility
Filter
8

9. Treatment Alternative 2: Reverse
Osmosis (RO)
Pretreatment 3-Stage RO Post Treatment
Acid Antiscalant
Finished Water
(90% Recovery)
CO2
Cartridge Excellent
Filters Water Quality
Well
Granular Brine to
Media Air Calcite
Treatment/
Filter Stripper Contactor
Disposal
9

10. Preliminary RO Results Summary
 Excellent membrane performance
 All three (3) RO membranes tested produced
good results which allows good competition
 All membranes tested maintained radium
below 1 pCi/L in the treated water
10

11. Comparison of Radium at the Point
of Entry Using RO and Single-Use IX
IX Effluent
RO Effluent
Combined TCEQ Limit
Ra 5
(pCi/L)
0
Time
11

12. GW Treatment/Disposal Alternatives
1. Single-Use Ion Exchange (IX) with spent media
to an approved landfill
2. Reverse Osmosis (RO) with Brine to:
a. Deep well injection
b. Land application (mixing with WWTP Effluent)
c. Single-Use Ion Exchange (IX)
12

13. 2a. Brine Disposal/ Deep Well Injection
 Inject RO brine into deep underground aquifer
 Location of injection wells needs to be identified
 Test well needs to be constructed and piloted at anticipated
full scale capacity prior to approval (approx 18 months)

14. 2b. Brine Disposal / Land Application
 Brine is pumped to storage pond at wastewater
treatment plant (WWTP)
 Brine blended with WWTP effluent
 Mixture is land applied

15. 2c. Brine Disposal/ IX Brine Treatment
 Single-use IX used to treat RO brine
 Treated concentrate sent to sewer
 Resin disposed of at a low-level radioactive waste site

16. Incorporation of Hickory GW into
Existing SWTP
 Investigated incorporation of Groundwater Treatment
Facilities to expedite design once a treatment alternative
is selected
 Evaluated existing plant conditions with respect to
regulations, reliability, performance & hydraulics
 Conducted a blending study to investigate compatibility of
the Surface Water & Ground Water
16

17. Estimated Construction Costs Comparison for
a Treatment Capacity of 6 mgd
2a. RO / Deep 2b. RO / Land
1. IX 2c. RO/IX
Well Inj. Application
Alternative
Capital Cost
(millions)
$23.4 $61.0 $65.0 $39.8
Annual O&M
(millions)
$3.3 $2.4 $1.8 $2.2
NPV O&M Costs
(millions)
$92.3 $68.5 $51.1 $62.2
Total NPV Cost
(millions) $115.7 $129.5 $116.1 $102.0
Note: Costs in millions and are for 2012 dollars, assuming a discount rate of 3% and a project life o
30 years starting in 2014, with a capacity of 6 mgd and no expansions.

18. Anticipated Schedule
RO/ Deep RO / Land
IX RO / IX
Well Application
Anticipated Start June 2012
Deep Well Full Scale Pilot
Design & Operation (Approval
needed by TCEQ, TWDB)
--- 18 --- ---
Design (Expedited) 8 11 11 9
TCEQ / TWDB Review 2 2 2 2
Bid/Award/NTP 2 2 2 2
Construction 12 – 15 15 - 18 15 - 18 15 - 18
24 - 28 48 - 51 30 - 33 28 - 31
Total time
months months months months
18

19. Treatment Alternative Evaluation Summary
Reverse
Ion Exchange Osmosis with
(IX) Brine (IX)
Treatment
Capital costs ✓
Annual O&M ✓
Net present value ✓ ✓
Schedule ✓ ✓
Treated water quality ✓
Water recovery ✓
Price fluctuations/competition ✓

21. EXTRA SLIDES

22. Capital Cost to Add 3 MGD Capacity in 2014
Reverse Osmosis with
Ion Exchange
IX of Brine
Additional Wells, piping,
civil, electrical etc
$14.5 $14.5
Booster Pump Station
Upgrade
$0.4 $0.4
Treatment $6.0 $11.1
Total Cost $20.9 $26.0
Note: Estimates are given in millions for 2012 dollars.
Additional engineering & management is estimated at 12% and is included in the estimate

23. Recommended SWTP Improvements
 Chemical storage and feed facilities for joint use
between GW and SW facilities
 New clearwell as the existing clearwell is reaching
its service life
 Facilities to recycle filter backwash washwater to
the head of the surface WTP will conserve an
average of 0.3 MGD (100 MG/year)
 Raw water blending and flow split structure to
handle the different source waters
23

24. Costs for Major Recommended SWTP
Improvement
Estimated Costs
Alternative
Clearwell $3.9
Backwash handling
facilities
$3.4
Flow blending split
structure
$2.9
New control/lab building $2.4
Note: Estimates are given in millions for 2012 dollars. Additional engineering &
management is estimated at 15% and is included in the estimate