150602 2014GW-PlantSiteADEQ RTC SignedCopy

1

Wilson, Tabatha

From: Hanson, LindaSent: Friday, August 07, 2015 3:55 PMTo: Wilson, TabathaSubject: FW: PG stamp/signature > Stratcor Plant Site > Response to CommentsAttachments: 150722_2014GW-PlantSiteADEQ_RTC_Full.pdf

For Z & W AR0000523 AFIN 26‐000002 File name: AR0000523_PG stamp and signature page for RTC for 2014 Ann GW Rpt_20150722 Linda A. Hanson, P. G. No-Discharge Section Permits Branch Water Division [email protected] 501-682-0646 From: [email protected] [mailto:[email protected]] Sent: Wednesday, July 22, 2015 3:53 PM To: Hanson, Linda Cc: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected] Subject: PG stamp/signature > Stratcor Plant Site > Response to Comments Linda ‐ At your request, we are submitting an Arkansas PG stamp and signature for the Umetco response to ADEQ comments onthe EVRAZ Stratcor 2014 Annual Groundwater Report. If you have any questions or need further information, please let me know.

Jennifer Ottoson Project Delivery Coordinator 813‐375‐1523 CH2M Boulder, Colorado

From: Wilson, Tabatha [mailto:[email protected]] Sent: Wednesday, July 15, 2015 9:41 AM To: Solaimanian, Jamal; Bailey, John; Bolenbaugh, Jason; Healey, Richard; Shafii, Mo; Carpenter, Ellen; Hynum, Tammie; Johnson, Charles; Ottoson, Jennifer/BSO Cc: Deardoff, Amy; Hanson, Linda Subject: AR0000523 Letter Re 2014 Annual Ground Water Report Good morning,

2

Please see the attached letter. Thank you, Tabatha Wilson Water Division 501-682-0656

Umetco Minerals Corporation

310 George Patterson Blvd, suite 100, Bristol, Pennsylvania 19007 (215) 785-7373

July 22, 2015

Ms. Linda Hanson Arkansas Department of Environmental Quality Water Division 5301 Northshore Drive North Little Rock, Arkansas 72118-5317

Subject: Response to Arkansas Department of Environmental Quality Preliminary Comments on the 2014 Annual Groundwater Report EVRAZ Stratcor, Inc. (Former U.S. Vanadium) Plant Site, Hot Springs, Arkansas Consent Administrative Order LIS-85-075

On May 7, 2015, Umetco Minerals Corporation (Umetco) received preliminary comments from the Arkansas Department of Environmental Quality (ADEQ) on the referenced report. On May 21, 2015, Umetco provided responses to several of the comments and requested an extension of the deadline to June 12, 2015. The purpose of this requested extension was to allow for sufficient time to submit the remaining information and to complete a re-evaluation of previously submitted data. ADEQ granted an extension until June 12, 2015.

Umetco met the deadline and provided responses to ADEQ’s comments on June 12, 2015. Umetco then received a letter from ADEQ on July 15, 2015 requesting that the submittal be signed and sealed by a registered professional geologist in the State of Arkansas. This revised submittal provides the full document and attachments, which are sealed by a registered professional geologist licensed in the State of Arkansas.

If you have any questions regarding this information, please contact me at (215) 785-7373.

Sincerely,

James F. Strunk, Jr., P.E. Remediation Leader Authorized Representative Umetco Minerals Corporation

Cc: Shane Weatherford, EVRAZ Stratcor, Inc. Susan Hayes, Umetco Minerals Corporation Project File Liz Peace, CH2M HILL

Enclosure

Response to Comments

Response to Comments Umetco’s responses to ADEQ comments from the May 7, 2015 letter are provided below, along with the full text of each of the comments.

Comment. Section 2.4: Please describe the fate of the recovered groundwater.

Response. Recovered groundwater is discharged to the Northeast Pond where it is managed by EVRAZ Stratcor, along with their process wastewater, and discharged under their National Pollutant Discharge Elimination System (Permit Number AR0000523).

Comment. Section 3.1: Please include potentiometric surface contour maps and site maps showing the locations of the alluvial wells and the Stanley Shale wells, respectively, not including the aerial photos.

Response. A site map showing the location of all of the monitoring and recovery wells without the aerial background is attached as Exhibit 1. Exhibits 2 and 3 give contour maps of the potentiometric surfaces for the Alluvial and Stanley Shale units, respectively. These maps were generated using water level data measured in monitoring wells during the fourth quarter of 2014; water levels were generally consistent across all quarters of 2014, and data from the fourth quarter are provided as representative of typical conditions.

Comment. Section 3.3: The 4th quarter groundwater samples were analyzed by Eurofins Lancaster Laboratories Environmental. The most recent information on the ADEQ and Eurofins Lancaster Laboratories Environmental websites indicate that this laboratory is not certified by the State of Arkansas to analyze chloride, nitrite, sulfate, or total dissolved solids. Please address this issue.

Response. Eurofins Environmental Laboratories Environmental was issued certification by ADEQ on April 16, 2015 (attached). The certification verifies that the methods used for the data reported meet ADEQ requirements. The certification is attached herein.

Comment. Section 4.3: Please address the source of high pH levels (between 11 and 12 s.u.) in monitor wells UO-87-9.1 and UO-87-9.2.

Response. Groundwater in monitoring well UO-87-9.1 has exhibited elevated pH since the well was installed in 1987. The well is screened in clay alluvium from 25 to 30 feet below ground surface and was dry during quarterly sampling in 2014. The well is located south of the Tailings Dam and southeast of the Effluent Ponds. Groundwater in the Alluvial aquifer typically has relatively low pH values in the range of 4.5 to 6.5 s.u. No other wells at the site have high pH values. Groundwater in the Alluvial aquifer in this area is not impacted by chloride, sulfate, or total dissolved solids (TDS), and there are no known or suspected sources of contamination proximal to UO-87-9.1. For these reasons it is suspected that the elevated pH may be caused by improper setting of the grout used to seal the well at the time it was constructed. Umetco will evaluate options for revitalizing or abandoning the well.

Well UO-87-9.2 has typically had pH values around 5 to 5.5 since 2008, though elevated pH has been reported sporadically in the well in the past. The elevated pH recorded in December 2014 appears to be an outlier and the value is suspected to be erroneous. A value of 7.19, closer to typical, historical values was recorded in March 2015. If an elevated pH value is obtained in the future, the calibration of the field equipment will be verified and the well will be resampled during the sampling event.

Comment. Section 4.3: Umetco refers to the ‘main plume area’. Please provide isoconcentration maps for the constituents discussed in the report.

Response. Exhibits 4 through 9 present isoconcentration maps in the Alluvial and Stanley Shale units for chloride, sulfate, and TDS: the constituents with target cleanup levels. The contours were based on sample data from monitoring wells for the fourth quarter, 2014 sampling event. These maps show areas exceeding the target cleanup levels of 250 micrograms per liter (mg/L) for chloride and sulfate, and 500 mg/L for TDS. With the exception of TDS in the Stanley Shale, each contour map shows two

Exhibits

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WestEffluentPond

Northeast Effluent Pond

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Tailings Dam

EastEffluentPond

West PondDrain

East PondDrain

Sump

Chad St

StratcorRd

Social Pl

Stra

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Stratcor Rd

Ingram Ln

Akers R

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Stratcor R

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Stratcor Rd

Malvern Rd

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Cl em Pl

Clem Pl

Marney Ln

UO-87-1.1A

UO-87-1.1B

UO-87-10.2

UO-87-2.1A

UO-87-2.1B

UO-87-3.1

UO-87-3.2

UO-87-4.1

UO-87-6.1

UO-87-6.2

UO-87-7.1

UO-87-7.2

UO-87-8.1

UO-87-8.2

UO-87-9.1

UO-87-9.2

UO-88-11.1

UO-88-11.2

UO-88-13.1UO-88-13.2UO-88-14.1

UO-88-14.2

UO-88-15.1

UO-88-15.2

UO-88-2.2

UO-91-16.1A

UO-91-16.1B

UO-91-16.2

UO-91-17.1A

UO-91-17.1B

UO-91-17.2

UO-91-19.2

UO-91-20.1B

UR-91-20.2A

UR-91-20.2B

UR-91-3.1BUR-91-3.1C

UR-91-3.1D

UR-91-3.1E

UR-91-3.2BUR-91-3.2C UR-91-3.2D

UR-91-3.2E

UR-91-4.1A

UR-91-4.2A

UR-91-9.2A

Marney

Draw

Exhibit 1

Monitoring and Recovery Well Location MapEVRAZ Stratcor Plant SiteHot Springs, ArkansasUmetco Minerals Corporation

\\WATERLOO\GIS\PROJECTS\HOTSPRINGS\GIS\MAPFILES\ANNUALMONITORING\2014_MONITORINGREPORT\ALLUVIUMSHALE_LOCATIONS.MXD JLOGAN1 6/8/2015 2:05:00 PM

0 200 400

Feet³Alluvium Locations

&A Monitoring Well

!( Recovery Well

Stanley Shale Locations

!A Monitoring Well

!( Recovery Well

�) Drain or Sump Sampling Point

French Drain

Stratcor Property Line

Marney Draw

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West

Effluent Pond

Northeast EffluentPond

IntermediatePond

Tailings Dam

East Effluent Pond

West PondDrain East Pond

Drain

Sump

Chad St

StratcorRd

Social Pl

Stra

tcher R

d

Stratcor Rd

Ingram Ln

Akers R

d

Stratcor Rd

MalvernRd

Stra

tcor R

d

Clem Pl

Clem Pl

Stratcor Rd

Marney Ln

Marney

Draw

425

420

415

410

400

395

390

385

380

430

405395

UO-87-1.1B

390.60

UO-87-2.1B389.65

UO-87-4.1395.64

UO-87-7.1371.41

UO-87-8.1

398.62

UO-87-9.1387.42

UO-88-13.1434.40

UO-88-14.1430.64

UO-88-15.1417.36

UO-91-16.1B395.30

UO-91-17.1B397.55

UO-91-20.1B

393.35

UR-91-3.1B387.06

UR-91-3.1C381.72

UR-91-3.1D385.79

UR-91-3.1E385.74

\\WATERLOO\GIS\PROJECTS\HOTSPRINGS\GIS\MAPFILES\ANNUALMONITORING\2014_MONITORINGREPORT\ALLUVIUMPOTENTIOMETRIC.MXD EA022055 6/8/2015 4:03:00 PM

0 200 400

Feet

Notes:

1. Data contoured are from the 4th Quarter of 2014

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French Drain


Marney Draw

Groundwater Elevation Contour (5ft Interval)

Exhibit 2

Alluvium Potentiometric Surface MapEVRAZ Stratcor Plant SiteHot Springs, ArkansasUmetco Minerals Corporation

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Tailings

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EastEffluent Pond

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Chad St

Social Pl

Stra

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d

Stratcor Rd

Ingram Ln

Akers R

d

Stratcor Rd

Malvern Rd

Clem Pl

ClemPl

StratcorRd

Marney Ln

Marney

Draw

465

460

455

450

445

440

435

420

415

410

405

400

430

425

395

390

385

380

UO-87-10.2381.09

UO-87-3.2381.75

UO-87-6.2370.52

UO-87-7.2372.54

UO-87-8.2390.89

UO-87-9.2384.73

UO-88-11.2382.02

UO-88-12.2R468.92

UO-88-13.2429.88 UO-88-14.2

410.36

UO-88-15.2415.17

UO-88-2.2389.18

UO-91-16.2396.37

UO-91-17.2394.68

UO-91-19.2

389.84

UR-91-20.2A392.43

UR-91-20.2B415.35

UR-91-3.2B353.94

UR-91-3.2C355.92

UR-91-3.2D378.57

UR-91-3.2E348.52

UR-91-4.2A349.58

UR-91-9.2A375.94

\\WATERLOO\GIS\PROJECTS\HOTSPRINGS\GIS\MAPFILES\ANNUALMONITORING\2014_MONITORINGREPORT\STANLEYPOTENTIOMETRIC.MXD JLOGAN1 6/8/2015 4:54:18 PM

0 200 400

Feet

Notes: 1. Data contoured are from the 4th Quarter of 2014

³!A Monitoring Well used for Contouring


French Drain


Marney Draw

Groundwater Elevation Contour (5ft Interval)

Exhibit 3

Stanley Shale Potentiometric Surface MapEVRAZ Stratcor Plant SiteHot Springs, ArkansasUmetco Minerals Corporation

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WestEffluentPond


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Tailings Dam

EastEffluentPond

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East PondDrain

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Chad St

StratcorRd

Social Pl

Stra

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d

Stratcor Rd

Ingram Ln

Akers R

d

Stratcor Rd

Malvern Rd

Stra

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d

Cl em Pl

Clem Pl

Marney Ln

UO-87-1.1A21.4

UO-87-1.1B1190

UO-87-2.1A264

UO-87-2.1B

750

UO-87-3.14590

UO-87-4.1NS

UO-87-6.1NS

UO-87-7.1139

UO-87-8.17.8

UO-87-9.1NS

UO-88-11.1NS

UO-88-13.1300

UO-88-14.110.8

UO-88-15.157.5

UO-91-16.1ANS

UO-91-16.1B2.7

UO-91-17.1A12

UO-91-17.1B6.5

UO-91-20.1B503

UR-91-3.1B667 UR-91-3.1C

753

UR-91-3.1D

2330

UR-91-3.1E1760

UR-91-4.1ANS

Marney

Draw

250

250

250

250

250

250

2,500

\\WATERLOO\GIS\PROJECTS\HOTSPRINGS\GIS\MAPFILES\ANNUALMONITORING\2014_MONITORINGREPORT\ALLUVIUMCHLORIDE.MXD JLOGAN1 6/8/2015 4:35:49 PM

0 200 400

Feet

Note:1. Results are in mg/L. 2. Data contoured are from the Fourth Quarter of 2014 Sampling Event. 3. NS = No Sample³

Alluvium Locations

&A Monitoring Well

!( Recovery Well


French Drain


Marney Draw

Concentration Contours

250 mg/L

2,500 mg/L

Inferred Concentration

Exhibit 4

Dissolved Chloride Concentrations in the Alluvial UnitEVRAZ Stratcor Plant SiteHot Springs, ArkansasUmetco Minerals Corporation

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Social Pl

Stra

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d

Stratcor Rd

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Stratcor Rd

Malvern Rd

Clem Pl

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Stratcor

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Marney

Draw

250

250

250

250

250

250

2,500

2,500

UO-87-10.2

UO-87-3.27260

UO-87-6.2230

UO-87-7.2273

UO-87-8.24.2

UO-87-9.2747

UO-88-11.2114

UO-88-12.2R59.6

UO-88-13.22210

UO-88-14.2233

UO-88-15.2199

UO-88-2.2231

UO-91-16.22.2

UO-91-17.22.3

UO-91-19.2483

UR-91-20.2A

4890

UR-91-20.2B4790

UR-91-3.2B3460

UR-91-3.2C3520

UR-91-3.2D3490

UR-91-3.2E2950

UR-91-4.2A1670

UR-91-9.2A

\\WATERLOO\GIS\PROJECTS\HOTSPRINGS\GIS\MAPFILES\ANNUALMONITORING\2014_MONITORINGREPORT\STANLEYCHLORIDE.MXD JLOGAN1 6/8/2015 4:39:28 PM

0 200 400

Feet

Note:1. Results are in mg/L. 2. Data contoured are from the Fourth Quarter of 2014 Sampling Event. ³


!A Monitoring Well

!( Recovery Well


French Drain


Marney Draw


250 mg/L

2,500 mg/L


Exhibit 5

Dissolved Chloride Concentrations in the Stanley Shale UnitEVRAZ Stratcor Plant SiteHot Springs, ArkansasUmetco Minerals Corporation

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Stratcor Rd

Ingram Ln

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Malvern Rd

Stra

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Cl em Pl

Clem Pl

Marney Ln

UO-87-1.1A48.5

UO-87-1.1B73.5

UO-87-2.1A317

UO-87-2.1B513

UO-87-3.1471

UO-87-4.1NS

UO-87-6.1NS

UO-87-7.14.4

UO-87-8.15

UO-87-9.1NS

UO-88-11.1NS

UO-88-13.1493

UO-88-14.1137

UO-88-15.1196

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UR-91-3.1B640

UR-91-3.1C809

UR-91-3.1D487

UR-91-3.1E8.5

UR-91-4.1ANS

Marney

Draw

250

250

250

\\WATERLOO\GIS\PROJECTS\HOTSPRINGS\GIS\MAPFILES\ANNUALMONITORING\2014_MONITORINGREPORT\ALLUVIUMSULFATE.MXD JLOGAN1 6/8/2015 4:22:21 PM

0 200 400

Feet


Alluvium Locations

&A Monitoring Well

!( Recovery Well


French Drain


Marney Draw


250 mg/L


Exhibit 6

Dissolved Sulfate Concentrations in the Alluvial UnitEVRAZ Stratcor Plant SiteHot Springs, ArkansasUmetco Minerals Corporation

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Stratcor Rd

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Stratcher Rd

Stratcor Rd

Ingram Ln

Akers Rd

Stratcor Rd

Malvern Rd

Clem Pl

ClemPl

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UO-91-16.2

UO-91-17.2

UR-91-3.2BUR-91-3.2C

UR-91-3.2D

UR-91-3.2E

UR-91-4.2A

UR-91-9.2A

Marney

Draw

250

250

250

UO-87-10.2NS

UO-87-3.2450

UO-87-6.26.9

UO-87-7.24

UO-87-8.22.9

UO-87-9.27.7 UO-88-11.2

6.2

UO-88-12.2R253

UO-88-13.259

UO-88-14.225.6

UO-88-15.217.8

UO-88-2.25.5

UO-91-16.24.5

UO-91-17.24.6

UO-91-19.21.6

UR-91-20.2A14.7

UR-91-20.2B14.3

UR-91-3.2B238

UR-91-3.2C380

UR-91-3.2D410

UR-91-3.2E47.2

UR-91-4.2A28.1

UR-91-9.2ANS

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0 200 400

Feet



!A Monitoring Well

!( Recovery Well


French Drain


Marney Draw


250 mg/L


Exhibit 7

Dissolved Sulfate Concentrations in the Stanley Shale UnitEVRAZ Stratcor Plant SiteHot Springs, ArkansasUmetco Minerals Corporation

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StratcorRd

Social Pl

Stratcher Rd

Stratcor Rd

Akers Rd

Stratcor Rd

Malvern Rd

Clem Pl

Clem Pl

UO-87-1.1A140

UO-87-1.1B2820

UO-87-2.1A

942

UO-87-2.1B1990

UO-87-3.112900

UO-87-4.1NS

UO-87-6.1NS

UO-87-7.1522

UO-87-8.1

36.5

UO-87-9.1NS

UO-88-11.1NS

UO-88-13.11240

UO-88-14.1251

UO-88-15.1405

UO-91-16.1ANS

UO-91-16.1B33 UO-91-17.1A

71.5

UO-91-17.1B64

UO-91-20.1B

1250

UR-91-3.1B

1930

UR-91-3.1C2210

UR-91-3.1D2750

UR-91-3.1E4330

UR-91-4.1ANS

Marney

Draw

500

500

500

500

500

500

5,000

\\WATERLOO\GIS\PROJECTS\HOTSPRINGS\GIS\MAPFILES\ANNUALMONITORING\2014_MONITORINGREPORT\ALLUVIUMTDS.MXD JLOGAN1 6/8/2015 12:29:32 PM

0 200 400

Feet


Alluvium Locations

&A Monitoring Well

!( Recovery Well


French Drain


Marney Draw


500 mg/L

5000 mg/L


Exhibit 8

Total Dissolved Solids Concentrations in the Alluvial UnitEVRAZ Stratcor Plant SiteHot Springs, ArkansasUmetco Minerals Corporation

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Dr

Rosemary

Dr

StratcorRd

Social Pl

Chad St

UmetcoRd

Stratcher Rd

Stratcor Rd

Ingram Ln

Akers Rd

Marney Ln

Stratcor Rd

Malvern Rd

Clem Pl

ClemPl

StratcorRd

UO-87-10.2NS

UO-87-3.222400

UO-87-6.2585

UO-87-7.2824

UO-87-8.2114

UO-87-9.22340

UO-88-11.2378

UO-88-12.2R

603

UO-88-13.27410

UO-88-14.2675

UO-88-15.2519

UO-88-2.2555

UO-91-16.2162

UO-91-17.2177

UO-91-19.2

1050

UR-91-20.2A5120

UR-91-20.2B6880

UR-91-3.2B7450 UR-91-3.2C

7650

UR-91-3.2D8280

UR-91-3.2E7740

UR-91-4.2A3290

UR-91-9.2ANS

Marney

Draw

500

500

500

500

5,000

5,000

\\WATERLOO\GIS\PROJECTS\HOTSPRINGS\GIS\MAPFILES\ANNUALMONITORING\2014_MONITORINGREPORT\STANLEYTDS.MXD JLOGAN1 6/8/2015 4:30:20 PM

0 200 400

Feet



!A Monitoring Well

!( Recovery Well


French Drain


Marney Draw


500 mg/L

5000 mg/L


Exhibit 9

Total Dissolved Solids Concentrations in the Stanley Shale UnitEVRAZ Stratcor Plant SiteHot Springs, ArkansasUmetco Minerals Corporation

Tables

Tables provided electronically

Revised Figures

0

5000

10000

15000

20000

25000

30000

Jan‐90 Oct‐92 Jul‐95 Apr‐98 Jan‐01 Oct‐03 Jul‐06 Mar‐09 Dec‐11 Sep‐14

Concentration (m

g/L)Figure 4‐6A

Chloride Concentrations in Alluvium Groundwater

UO‐88‐13.1 (Upgradient) UO‐87‐9.1 (Main Plume Area) UO‐87‐3.1 (Main Plume Area)

UO‐87‐8.1 (Cross‐gradient) UO‐87‐6.1 (Downgradient) Target Cleanup Goal (250 mg/L)

1

10

100

1000

10000

100000

Jan‐90 Oct‐92 Jul‐95 Apr‐98 Jan‐01 Oct‐03 Jul‐06 Mar‐09 Dec‐11 Sep‐14

Concentration (m

g/L)Figure 4‐6B

Chloride Concentrations in Alluvium Groundwater



0

5000

10000

15000

20000

25000

Oct‐89 Jul‐92 Apr‐95 Jan‐98 Oct‐00 Jun‐03 Mar‐06 Dec‐08 Sep‐11 Jun‐14

Concentration (m

g/L)

Axis Title

Figure 4‐7AChloride Concentrations in Stanley Shale Groundwater



1

10

100

1000

10000

100000


Concentration (m

g/L)

Axis Title

Figure 4‐7BChloride Concentrations in Stanley Shale Groundwater



0

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500

600

700

800

900

1000


Concentration (m

g/L)Figure 4‐8

Sulfate Concentrations in Alluvium Groundwater



0

100

200

300

400

500

600

700


Concentration (m

g/L)Figure 4‐9

Sulfate Concentrations in Stanley Shale Groundwater



0

5000

10000

15000

20000

25000

30000

35000

40000


Concentration (m

g/L)Figure 4‐10A

Total Dissolved Solids Concentrations in Alluvium Groundwater



1

10

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1000

10000

100000


Concentration (m

g/L)Figure 4‐10B

Total Dissolved Solids Concentrations in Alluvium Groundwater



0

10000

20000

30000

40000

50000

60000


Concentration (m

g/L)Figure 4‐11A

Total Dissolved Solids (TDS) Concentrations in Stanley Shale Groundwater



1

10

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1000

10000

100000


Concentration (m

g/L)Figure 4‐11B

Total Dissolved Solids (TDS) Concentrations in Stanley Shale Groundwater



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