Scott Reinert, P.E. Water Resources Manager Concentrate Management at the Kay Bailey Hutchison Desalination Plant in El Paso, Texas 2019 TCEQ Trade Fair - Austin, Texas May 15, 2019 Title: Concentrate Management at the Kay Bailey Hutchison Desalination Plant in El Paso, Texas 2019 TCEQ Trade Fair – Austin, Texas May 15, 2019 Speaker – Scott Reinert, P.E. Water Resources Manager Scott Reinert, P.E. Water Resources Manager

Kay Bailey Hutchison Desalination Plant Opened in 2007 to deal with: Drought Emergency situations Growth Brackish water intrusion Kay Bailey Hutchison Desalination Plant Opened in 2007 to deal with: Drought Emergency situations Growth Brackish water intrusion Photo – Exterior photo of the Kay Bailey Hutchison Desalination Plant May 15, 2019 El Paso Water

B F Airport Area This is a map showing the relative distribution of “Fresh “ and “Brackish” water in the Hueco Bolson. The “Brackish” water is source of water for the Desalination plant. May 15, 2019 El Paso Water

Map of concentration wells. May 15, 2019 El Paso Water

Remote Concentrate Disposal Area Less costly and less environmental impact than evaporation ponds 3 injection wells Concentrate pipeline (22 mi) Remote Concentrate Disposal Area Less costly and less environmental impact than evaporation ponds 3 injection wells Concentrate pipeline (22 mi.) Graphic: Image of injection wells. May 15, 2019 El Paso Water

Photo: A downhole camera was used to take this photo Photo: A downhole camera was used to take this photo. This photo was taken at a depth of 2300 ft. in the uncased portion in JDF-3. The dolomite is fractured and will easily accept the injected concentrate. May 15, 2019 El Paso Water

Photo: This is a core sample collected at depth of 2300 feet in TH3 Photo: This is a core sample collected at depth of 2300 feet in TH3. This core sample was collected from the Fusselman Dolomite. The extensive fracturing is an indicative of good reservoir capacity. May 15, 2019 El Paso Water

Highlights of 10 year Plant Operation Peak annual production was 2013 (7329 acre-feet) corresponding to lowest river supply in 100 years Over 53,000 acre-feet of finished water produced in 10 years Highlights of 10 year plant operation Peak Annual Production was 2013 (7329 acre-feet) corresponding to lowest river supply in 100 years. Over 53,000 acre-feet of finished water produced in 10 years. May 15, 2019 El Paso Water

Highlights of 10 year Plant Operation Typical operation - 8 MGD February 7, 2011 - Big Freeze - 22 MGD to help restore water supply in El Paso Drought conditions - May 2012, no surface water in May - 19 consecutive days of production over 20 MGD Highlights of 10 year Plant Operation Typical Operation – 8 MGD February 7, 2011 – Big Freeze – 22 MGD to help restore water supply in El Paso Drought Conditions – May 2012, no surface water in May – 19 consecutive days of production over 20 MGD May 15, 2019 El Paso Water

August 31, 2019 Graph: How many acre/feet of water being pumped at the Kay Bailey Hutchison Desalination Plant May 15, 2019 El Paso Water El Paso Water

Enviro Water Minerals Company (EWM), Public Private Partnership Partnership between EPWater and EWM Construction of a new plant adjacent to existing desalination plant EWM uses EPWater concentrate to recover minerals EPWater receives an additional 2 million gallons of potable water from EWM Enviro Water Minerals Company (EWM), Public Private Partnership Partnership between EPWater and EWM Construction of a new plant adjacent to existing desalination plant EWM uses EPWater concentrate to recover minerals EPWater receives an additional 2 million gallons of potable water from EWM May 15, 2019 El Paso Water

Enviro Water Minerals Company (EWM), Public Private Partnership Enviro Water Minerals (EWM) Public Private Partnership Graphic: Shows Enviro Water Minerals process Enviro Water Minerals is using cutting edge technology to recover minerals from waste brine from desalination plants. Enviro Water Minerals is using cutting edge technology to recover minerals from waste brine from desalination plants. May 15, 2019 El Paso Water

Enviro Water Minerals (EWM) EWM chemically separates the concentrate into high-purity industrial grade minerals products that are highly valued in commercial markets. Potash Liquid Fertilizer Bromide Rich Brine (Power plant mercury scrubbing) Milk of Magnesia (Water treatment) Enviro Water Minerals (EWM) EWM chemically separates the concentrate into high-purity industrial grade mineral products that are highly valued in commercial markets. List of items produced: Potash liquid fertilizer Bromide Rich Brine (Power plant mercury scrubbing) Milk of magnesia (water treatment) May 15, 2019 El Paso Water

Proposed EWM Concentrated and Effluent Alignment SITE Raw Well Water Desalination Plant Concentrate Permeate line Proposed EWM Concentrated and Effluent Alignment Map showing the location of the EWM site and the KBH Desalination Plant. May 15, 2019 El Paso Water

EWM Proposal and Agreement to EPWater Permeate will be treated to meet TCEQ drinking water standards where it will then be pumped into EPWater’s potable water distribution system. EWM Proposal and Agreement to EPWater Permeate will be treated to meet TCEQ drinking water standards where it will then be pumped into EPWater’s potable water distribution system. May 15, 2019 El Paso Water

Questions Questions Image of a question mark May 15, 2019 El Paso Water