email: transmits jan 2016 monthly rpt & monthly arimetco ... · 2) next steps for the second tm...

1

Rodriguez, Dante

From: Zimmerman, Chuck <[email protected]>Sent: Tuesday, February 09, 2016 9:53 AMTo: Seter, DavidCc: 'Oman, Jack'; Ball, Harold; Rodriguez, Dante; [email protected]; Jeryl Gardner;

'Phyllis P. Hunewill'; '[email protected]'; [email protected]; [email protected]; 'Halsey, Ronald H'; Dunkelman, Tom; '[email protected]'; Gallery, Patricia A ([email protected]); [email protected]; Helmlinger, Andrew; 'Tom Bowden'; 'Taurus Massey'; '[email protected]'; 'John Batchelder'; '[email protected]'; [email protected]; [email protected]; '[email protected]'; [email protected]; '[email protected]'; Isham, Julian; McMillan, John (CFS); '[email protected]'; '[email protected]'; '[email protected]'; 'Chatham, James R'; 'Duffy, William'; '[email protected]'; 'ROB LOVEBERG'; [email protected]; [email protected]; '[email protected]' ([email protected])

Subject: January 2016 Monthly Report for the Yerington Mine SiteAttachments: January 2016 Monthly Report.pdf; Arimetco FMS January 2016 Monitoring Data.pdf

Categories: A08 - Arimetco

Dave: The January 2016 monthly report for the Yerington Mine Site is attached, along with the monthly Arimetco Fluid Management System (FMS) monitoring data. The original will be sent to you today by certified mail. Hard copies will be sent via regular mail to the Lyon County Library, Chairwoman Thom, Ginny Hatch, Dietrick McGinnis, Cynthia Oceguera and Peggy Pauly. This e-mail serves as the submittal for the remainder of the copied recipients. Please forward this e-mail to others who may be interested in the January 2016 monthly report. Regards, Chuck Zimmerman Vice President Brown and Caldwell [email protected] T 775.283.0810 | C 775.233.5575

SEMS-RM DOCID # 1162027

mailto:<[email protected]>

mailto:[email protected];

mailto:[email protected]




mailto:([email protected]);















mailto:@aol.com

mailto:([email protected])


Atlantic Richfield Company

JackOman Project Manager

Februmy 9, 2016

CERTFED- RETURN RECEPT REQUES'IE)

Mr. Daw Saler Remedial f'nllect Mmlagar U.S. Environmenlll Pm•~~ - Region 9 76 Hawthorne Slnlet, SFD-9-1 san Francllco, CA 94105

4 Cenlllrpoinlll Drive LaPalma, CA. 90823-1066 (8117) S2MS81 office (714) 870-6195 faK jack.omanfllbp.com

SubJect: J•11wy 2011 llanthly Rapoll, YMlngmn •n• Sita, Lyon Count,, Nnada:

Dear Mr. seter.

Admlnlllil1ll.a ONIW for Rlmldlll IRwNllg111an and FNllbllty ltudJ (RUFI}. CERCLA DHlmt No. N007.oooti; Alhlnlaballwa Order on ConNnt, CERCLA Docket No. ONOON010

Pu,auant to the llllolla referenced anlers Jaaued by the U.S. Envlronmenlllll PrDtac11an Agency - Region 9 (EPA), Atlantic Richfilld Company (ARC) has prapared this January 2018 mGflthly raport for Rll'FS and Operallona and Maintenance (O&M) acllv1tl8a at lhe Yerington Mine Sll8 (Sita).

Januaiy 21111 Actlvllla

Stto SecurttY and PIM &#,!lo, • Cantinuad Silll O&M, uc:urily and bn dal9nant aclMtin. The two acurily c:amaras indic«tad no

ac:1lvlty of c:oncam. • Whl danceis, bN deterrent !legs, Wetlandl Wallel'I and Bird Gard towe,. conl!nued to be

daploywd in~ IIW1h cu111111t EPA-approved bird dat.rrant mathoda. To reduce birds from becamlng habituated 1D Ille pl'llllllnca otwfnd dancera and flap, ttl- devlc8a ware lllloc8t8d u needed. Bi RI Gard towe11 'A', 'B' and 'C' wete in operation throughout January.

• Cantlnuad Iha EPA-eppn,vad bird datemint achadula Mth at laaat thraa monlto!lng vlaltB p.- day at al pondl plu. a fourth monJIDrlng visit at the Arlmelco FMS pends. ObW\iallona were made within half an hour of dawn and dllllk IDI dumg mid-day.

• PWS Pond water JevelB: North Cel • o.o feet; Middle Cell• 0.05 feel; South Cell • 0.15 feet • M ol Janua,y 29, the Nmetco FMS pond !MIii were: Phlle 1 Pond = 5.05 feel; FMS

Evaporation Pand A = 9.64 faat; FUS Evaporation Pond B = 6.83 111111; FMS Evapol8tion Pond C = 5.91 feel; VL T Pond = 10.56 feet; Slot Pond = 17.83 feet. The freeboanl leVel In FMS Evaporation Pond A on January 29 - approximataly 0.111 fael Re-c:alibratad tha pn1119ura tranaduan In FMS Evapondlon Panda e and C, 1118 VL T Pond and the Slot Pond, aa a .-ill ol changing fluid density. Fluid tran&fetl in January were: 100,097 gallons frcm the Slot Sediment Pond lo Iha VL T Pond, and 22,28& galona from Iha Ph- 1 pond ID the VL T Pond.

• About 0.88 lnchea of rlln fel on tlle Site In Jan .. ry. see atll.ched monltiorlnr, data. • AppRIXimataly 2.3,832 galklnl of lllllulion wa111 pumpad from 1he laak dal1lclDl1I in January

Jrdldlng 4,217 gallonl from Iha VL T Heap Leach Pad (HLP) and 1,094 galona tram Ille VI. T Sediment Pand, and 17,829 gallons frcm ttle Slot (HLP) perimeter collection dilch. See all:lehed monitoring data.

bp

A BP affiliated company ©

Mr. Dave Seter Yerington Monthly Report February 9, 2016 Page 2 of 4

January 2016 Activities - Continued

Site Security and O&M Activities - Continued • Fawcett Electric and Desert Engineering were on Site on January 19 and 21 to prepare for the

fluid transfers from the Slot Pond. Re-established flow monitoring for Phase 1 pumping on January 28.

• Transmitted updated FMS water balance information to EPA and NDEP prior to a conference call held on January 21 to discuss observed and predicted pond filling rates and FMS management options.

• Initiated a review of the Draft Work Plan for Enhanced Evaporation Pilot Test dated January 27, 2016 prepared by SPS to evaluate the effect of enhanced evaporation on the FMS water balance.

• Initiated a review of the 2010 Arimetco FMS O&M Plan to assess how best to modify the plan with EPA and NDEP inputs.

Site Characterization Activities • Site-wide monthly groundwater elevation measurements were obtained January 25-26 for new

wells and wells outfitted with pressure transducers. • A Pit Lake water elevation of 4,234.34 feet amsl was recorded on January 26, 2016 from the

pressure transducer, an increase of 0.30 feet since December 26, 2015. The pit lake elevation has risen 1.87 feet since January 26, 2015.

• No changes to the Bottled Water Program in January. • No changes to the Domestic Well Monitoring Program in January. • Transmitted the 3Q 2015 Groundwater Monitoring Report (GMR) on January 15. • Continued to compile information for inclusion in the OU-1 RI Report. • On January 22, transmitted a letter with attachments describing proposed modifications

(increased number of locations) to the geochemical sample locations that were presented in the Evaporation Ponds Phase 1 Field Sampling and Analysis Plan (FSAP) dated July 31, 2014.

• On January 29, transmitted the Bedrock Groundwater Assessment Technical Memorandum (TM). • Initiated preparations for implementing the Phase 1 OU-7 FSAP. • Participated in a conference call with EPA and NDEP on January 27 to discuss: 1) EPA

comments on the first TM associated with the OU-3 human health risk assessment (HHRA); and 2) next steps for the second TM and development of the OU-3 HHRA Work Plan.

• Routine database management activities in support of Site investigations and monitoring.

Planned February/March 2016 Activities

Site Security and O&M Activities • Continue routine Site O&M, security and bird deterrent activities. • Discuss the Draft Work Plan for Enhanced Evaporation Pilot Test with SPS, EPA and NDEP.

Site Characterization Activities • Continue groundwater elevation and pit lake level measurements, and meteorological monitoring. • Continue the Bottled Water Program. • Conduct the 1 Q 2016 groundwater monitoring event (February 1 - 23). • Conduct the 1Q 2016 domestic well monitoring event (March 7 - 10). • Complete and transmit the Annual 2015 DWMR. • Continue the compilation of data for inclusion in the Annual 2015 GMR. • Continue discussions with EPA regarding the proposed parameter reduction list for routine

quarterly groundwater sampling, and initiate discussions to reduce the scope of quarterly monitoring report contents for the domestic well and groundwater monitoring programs.

• Implement the planned Phase 1 OU-7 FSAP activities during March.

Mr. Dave Seter Yerington Monthly Report February 9, 2016 Page 3 of4

Planned FebruarylMarch 2011 ActlvltlN - Continued

Site Characterization .Activities - Continued • Discuss with EPA and NDEP the proposed Increase In the number of geochemlcal sample

loc:ations in the Evaporation Ponds, pursuant to the planned OU-4a Phaae1 b scope of work. • Continue work on the OU-1 RI Report, and discussions with EPA and NDEP regarding the

development of remedial action objectives (RAOs) and potential remedial alternatives for OU-1. • Continue discussions with EPA regarding the OU-1 HHRA. • Transmit, and discuss with EPA and NDEP the second OU-3 HHRA TM. • Continue working on responses to comments from EPA dated March 16, 2015 on the Process

Areas (OU-3) Step-Out Characterization DSR, and the development of a Process Areas RI Report starting with a scoping discussion with EPA.

Please contact me at (657) 529-4581 or via &-mall at !acl<[email protected] If you have any questions or comments about the January 2016 monthly report

Sincerely,

J-~-JackOman Project Manager

Attachment

cc: Hany Ball, EPA - via electronic mail Dante Rodriguez, EPA - via electronic mail Andrew Helmlinger, EPA- via elec:tronic mail Tom Dunkelman, EPA-via electronic mail Jeff Collins, NDEP - via electronic mail Jeryl Gardner, N DEP - via electronic mail Dave Davis, BLM - vie electronic mail Dan Newell, City of Yerington - via electronic mail Phyllis Hunewill - via electronic mail Jim Sanford, MVEC - via electronic mail Torn Grady, Nevada State Assembly-via electronic mail Chairwoman Thom, YPT -via electronic mail Ginny Hatch, YPT -via electronic mail Deborah Dunn, YPT - via electronic mail Dietrick McGinnis, McGinnis and Associates -via electronic mail Tom Bowden, Rldolll, Inc. -via electronlc mall Chalnnan Sanchez, WRPT -via electronic mall Cynthia Oceguera, WRPT - via electronic mail Ron Halsey, Atlantic Richfield Company- via electronic mail James Lucari, Atlantic Richfield Company- via electronic mail Patricia Gallery, Atlantic Richfield Company- via electronic mail Brian Johnson, Atlantic Richfield Company- via electronic mail John Batchelder, EnviroSolve - via electronic mail Jim Chatham, Atlantic Richfield Company - via electronic mail Adam Cohen, Davis Graham & stubbs - via electronic mail Bill Duffy, Davis Graham & stubbs - via electronic mail Tom Patton, Singatse Peak Services, LLP - via electronic mail Taurus Massey, Singatse Peak Services, LLP-vie electronic mail David Peri, Peri and Sons - via electronic mail

Mr. Dave Seter Yerington Monthly Report February 9, 2016 Page 4 of 4

John McMillan, CBI - via electronic mail Julian Isham, CBI - via electronic mail Victor Early, Tetra Tech - via electronic mail Colin Lee, Tetra Tech - via electronic mail Ken Greene, CH2M Hill - via electronic mail Peggy Pauly, YCAG-via electronic mail Lyon County Library System Central

Arimetco VLT Pond Flow (January 2016)

50000 2.0 Total flow to VLT Pond= 256,111 gallons 1.9 VL T Heap Leach Pad = 141,029 gallons or 3.38 gpm VL T Pond Weir Flow

45000 Fluid transfer from Slot Pond = 92,797 gallons - Precipitation * Fluid transfer from Phase 1 Pond = 22,285 gallons

1.8

1.7

40000 * Average of north and south - 1.6 on-site rain gauges 1.5

35000 I Fluid transfer from Phase 1 Pond 1.4

-~ "Cl 30000 ... ~ Q., ~ = = 25000 --= 1:1!) -~ = 20000 -~

\ ! Fluid transfer from Slot Pond L.._

I'\ --Preciuitation Precipitation January 2016 = 0.99 inches

~

,- Total Precipitation 2016 = 0.99 inches

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2016 Monthly Leak Detector Data

Leak Detector ID1 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year To Date

Total (Gallons)

Units G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D G/M G/D G/Ac-D

VLTSP w

1,094 1,094.0 35.3 196.1

VLTP1 D

0 0.0 0.0 0.0

VLTD1 w

4,217 4,217.0 136.0

VLTD2 w

501 501 .0 16.2

VLTD3 D

0 0.0 0.0

Tot VLTD1 + D2 + D3 4,718.0 152.2 2.7

EP"B" D

25 25.0 0.8 0.7

EP"C" D

0 0.0 0.0 0.0

IFX w

111 111 .0 3.6

II FX w

55 55.0 1.8

Ill FX D

0 0.0 0.0

Tot 1FX+ 2FX + 3FX 166.0 5.4 0.1

SSP1 D

0 0.0 0.0 0.0

SD1 w

17,829 17,829.0 575.1

SD2 D

0 0.0 0.0

SD3 D

0 0.0 0.0

Tot SD1 + SD2 + SD3 17,829.0 575.1 8.7

MD1 w

0 0.0 0.0 0.00

Total 23,832 23,832

Notes: 1) Leak Detector Locations shown on Figure 2-1 of the 2015 Annual O&M Report (March 31 , 2015)

2) W = Wet; and D = Dry ("Wet" and "Dry" visual observations)

3) G/M = Gallons per Month

4) G/D = Gallons Per Day

5) G/Ac-D = Gallons per Acre per Day (monthly average)

6) VL T Sediment Pond Area = 0.18 acres

7) VL T Pond Area = 1.25 acres

8) Slot Sediment Pond Area = 0.18 acres

9) Slot Pond 2 Area = 1.1 acres

1 O) Evaporation Pond B Area = 1.1 acres

11) Evaporation Pond C Area = 1.1 acres

12) Slot Heap Leach Pad (HLP) Area= 66 acres

13) VLT HLP Area= 56 acres

14) Phase Ill 4X HLP Area= 47 acres

15) Phase Ill South HLP Area= 48 acres

16) Individual HLP perimeter collection ditch leak detector flows combined (Tot VL T D1 +D2+D3, Tot 1 FX+2FX+3FX, and Tot SD1 +SD2+SD3) for estimating flows in Gallons per Acre per Day (G/Ac-D)