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Williams AR # 1610 Page 1 of 75


DEPARTMENT OF THE AIR FORCEAIR FORCE CIVIL ENGINEER CENTER

11 June 2013MEMORANDUM FOR SEE DISTRIBUTION

FROM: AFCEC/CIBW706 Brooks RoadRome NY 13441

SUBJECT: Restoration Advisory Board Meeting Minutes, 13 November 2012

1. Attached please find the final minutes from the 13 November 2012 Williams RestorationAdvisory Board (RAB) meeting held at the Arizona State University Polytechnic Campus asapproved by the RAB members at the 19 February 2013 meeting.

2. If you have any questions or comments, please contact Ms. Linda Geissinger at(916) 643-6420 x109.

CATHERINE JERRARD, PEBRAC Environmental Coordinator

Attachment:Final RAB Meeting Minutes, 13 November 2012


DISTRIBUTION LISTFinal 13 November 2012 Williams RAB Meeting Minutes

Electronic Copy

Col. Len Fuchs, RAB Community Co-ChairCatherine Jerrard, RAB Co-Chair, AFCECDale Anderson, RAB, Gila River IndianCommunityScott Bouchie, RAB, City of MesaDon Atkinson, RAB, ADEQMatt Fesko, RAB, ASU graduate studentLonnie Frost, RAB, Gilbert Public WorksCarolyn d'Almeida, RAB, USEPALisa Marie Gerdel, RAB, Gilbert residentJames Holt, RAB, Queen Creek residentTom Zuppan, RAB, Gilbert residentAlan Ruffalo, RAB, Power Ranch residentDennis Orr, RAB, Gateway AirportPat Tennant, RAB, ASUTeresa Harris, RAB, Gilbert residentDoug Ashline, CitizenDominic Hernandez, CitizenDana Koziel, CitizenDon Lyon, CitizenBen Shunk, Gilbert residentLeo Pessin, Gilbert residentBeverly Selvage, Mesa residentThom Schuett, Queen Creek residentDon Smallbeck, AMECEverett Wessner, AMECJulie Hamilton, AMECEmily Corker, AMECChris Courtney, AMECLinda Geissinger, AFCEC/CIBWBrian Sytsma, Napkin CommunicationsScott Johnston, Napkin CommunicationsMary Hall, AFCEC Public Affairs contractorGeoff Watkin, Cherokee Nation Gov. ServicesCalvin Cox, Cherokee Nation Gov. ServicesPatrick Banger, Town of Gilbert - City ManagerSharalyn Barnby, ASUAngela Creedon, ASULatonja West, ASUSteve Nielson, ASU

Joshua Hoyt, ASUSteve Hunter, ASURichard Malloy, ASUTheodore Betkie, ASU studentThomas Butler, USEPAEva Davis, USEPACollin DeWitt, Gilbert Fire Dept.Lawrence Dough, Able EngineeringVictor Gamez -Grij alva, CH2MHILLColleen Gilbert, Congressional Military AffairsMark Holmes, City of MesaJim Husbands, Booz Allen HamiltonAngie Kannada, Tierra DynamicsDan Kelley, Terra DynamicsAdam Mahamed, ADEQWayne Miller, ADEQDelfina Olivares, ADEQTravis Barnum, ADEQFelicia Calderon, ADEQLaura McNamara, HGLKimberly Vaughn, HGLRoger A. Fitzpatrick, HGLJohn Pekala, Environmental CorporationKathy Rall, Town of GilbertMartin Sepulveda, Sepulveda GroupBrian Sexton, Gateway AirportBrian Snowden, Arizona Green MagazineGlenn Stark, Gila River Indian CommunityGlen Stephens, Ch. 11 Mesa public accessArt Thomason, Arizona RepublicPhil Whitmore, CH2MHILLJanet Workman, URSJay Harbin, URSElspeth Sharp, URSDevan Phelan, Terra ThermJohn Meter, City of MesaDianna Saenz, AFCECSteve Willis, UXO Pro, ADEQ contractorBill Mabey, Tech Law

Attendees:NameMs. Michelle Lewis

Mr. Len FuchsMs. Cathy Jenard

Mr. Scott JohnstonMs. Mary HallMr. Dennis OnMr. Don AtkinsonMr. Geoff WatkinMr. Dale AndersonMr. Jim HoltMr. Glen SmithMr. Alan RuffaloMs. Lisa GerdlMr. Tom ZuppanMr. Everett WessnerMr. Don SmallbeckMs. Kim MeachamMr. Roger FitzpatrickMr. John Lewis Jr.Mr. Leo PessinMr. Tim TempleMr. Scott BouchieMr. Victor Gamez-GrijalvaMr. Matt FeskoMs. Pat TennantMr. Steve WillisMs. Pam WalrathMr. Theodore BaltrieMr. Greg LeCheminant

1

Williams AR # 1610

Former Williams Air Force Base (AFB)Restoration Advisory Board (RAB)

Meeting Minutes

November 13, 2012, 7:15 p.m.Arizona State University Polytechnic Campus

Peralta Hall #1327171 E. Sonoran Arroyo Mall

Mesa, AZ

Page 4 of 75

OrganizationAir Force Civil Engineer Center (AFCEC) /Base Realignment andClosure (BRAC) Environmental Coordinator (BEC)/Air Force Co-chair (outgoing)RAB Community Co-chair/Gilbert residentAir Force Civil Engineer Center (AFCEC) /Base Realignment andClosure (BRAC) Environmental Coordinator (BEC)/Air Force Co-chair (incoming)AFCEC Public Affairs/ Napkin CommunicationsAFCEC Public Affairs/Napkin CommunicationsPhoenix-Mesa Gateway AirportArizona Department of Environmental Quality (ADEQ)Cherokee Nation Government Solutions, AFCEC support contractorGila River Indian CommunityRAB Member/Queen Creek residentGilbert residentGilbert residentRAB Member/GilbertRAB Member/GilbertAMECAMECUS Army EngineersUS Army ESCHUS Army ESCHGilbert residentCherokee Nation Government Solutions, AFCEC support contractorCity of MesaCH2MHILLArizona State University (ASU) student/RAB memberArizona State University (ASU)UXO Pro, ADEQ technical support contractorArizona State University (ASU)Arizona State University (ASU) studentQueen Creek resident


Mr. Len Fuchs called the meeting to order at 7:15 p.m. and asked the attendees to introduce themselves.The RAB approved the August 2012 meeting minutes without changes. Mr. Fuchs announced theNovember RAB meeting will be the last for Williams BRAC coordinator and Air Force Co-ChairMichelle Lewis, who will be leaving to take an Air Force position in Germany.

Ms. Michelle Lewis introduced Ms. Cathy Jenard as her replacement.

Ms. Lewis thanked everyone for their support and for taking time out of their evening to attend theWilliams RAB meeting. She thanked ASU representative Pat Tennant and Phoenix-Mesa GatewayAirport representative Dennis Orr, among others, for the cooperative and productive support that theyprovided as part of the Williams team.

Ms. Lewis reviewed the action item from the August RAB meeting: Mr. Zuppan asked what theavailability for the ST012 Focused Feasibility Study would be. Ms. Lewis responded that it is not quiteready yet, but that it should be ready for review by the February RAB meeting.

Status Updates for UST 1114, ST035, ST012, FT002, SS017 and LF004Mr. Everett Wessner presented updates for each site, see attached slides for more information. RAB andcommunity discussions for each site are presented below.

UST 1114 (Underground Storage Tank, VORTAC facility)Mr. Wessner stated that UST 1114 was an underground storage tank located on the flight line; it wasremoved in 1993. To support site closure, ADEQ required sampling under the former tank for volatileorganic compounds (VOCs) and polynuclear aromatic hydrocarbons (PAHs). Samples were collectedand analyzed in April; there were no detections that exceeded cleanup levels established for unrestricteduse. A report was submitted to ADEQ and regulatory approval for unrestricted site closure was receivedin October.

ST035, Former Base Gasoline Station Building 760Mr. Wessner summarized the slides presenting the site background, contaminants, and cleanup methodsin place. Soil vapor extraction (SVE) continues to remove fuel contaminants from the soil; groundwatermonitoring is ongoing. The goal is to achieve site closure under Underground Storage Tank (UST)regulations.

Groundwater flow continues to trend to the east. The last groundwater sampling event was conducted at13 wells in August. Benzene was detected in eight (8) wells, down from nine (9) wells during the Maysampling event. Of the eight (8) wells where benzene was detected, seven (7) were below or right at theADEQ UST Tier 1 Corrective Action Standard of 5 µg/L. The concentrations of benzene in groundwaterhave significantly decreased since SVE startup in 2010 indicating that the soil cleanup action has reducedfurther impacts to groundwater. The fuel additive 1,2- dichloroethane (1,2-DCA) was detected in six (6)wells in August, up from five (5) wells in May. One well was less than the standard and five (5) wellsexceed the standard (also 5 µg /L), but not by large margins. Concentrations of 1,2 DCA remained similarin the source area but decreased below the standard in the down gradient well.

The fuel components toluene and xylenes, and the fuel additives methyl tert-butyl ether (MTBE) andethylene dibromide (EDB), continue to be below ADEQ UST Tier 1 Corrective Action Standards in allwells. The next quarterly sampling for existing wells is scheduled for November 2012. Groundwaterwells are being added to further characterize the source area and to determine if there has been plumemigration down gradient to the southeast. Well installation in the former source area began in October2012 and completion of the new down gradient wells is anticipated for November 2012. The new wellswill be sampled in January or February 2013. The Air Force will continue evaluating groundwatermonitoring data in order to define the plume area and determine if cleanup actions are effective or ifadditional actions are needed.

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The SVE system had a 99.6 % operational uptime and removed 646 gallons of petroleum hydrocarbonsduring the July-September period, down from 878 gallons removed during the April-June period. Thisshows that as mass is removed the rate of removal is decreasing as expected. A total of 16,500 gallonshave been removed to date and 11 of 15 wells are currently operating. The next SVE system performancesampling is scheduled for November 2012. Mr. Wessner stated the path forward will include continuingSVE operation, completing groundwater characterization, and performing groundwater remediation asneeded. Ultimately, the Air Force and AMEC want the site cleaned to regulatory standards and closed forunrestricted use.

Questions asked during ST035 presentation:

Mr. LeCheminant asked if characterization would be what the profile of contamination is. Mr. Wessnerexplained that characterization is the process of defining the type and distribution of contaminants ingroundwater using the data collected from the new and existing wells. The results of characterization mayindicate that something more needs to be done or that the current approach is resulting in site cleanup.

Mr. LeCheminant asked if there is an anticipated date for site closure. Mr. Wessner responded thatclosure is anticipated within the next 7 years. Mr. Wessner stated that he expects closure would occursooner than 7 years but it is dependent on the progress of SVE and the extent to which groundwaterremediation may be needed.

Mr. Fesko asked if there are any GCMS chromatograms for results of some of the sampling being doneon the groundwater and soil that would show the distribution of the contaminants over the carbon numberranges. Mr. Smallbeck responded that the lab reports and date packages would be in the quarterlymonitoring reports which are available at the repository. The analytical data and reports are provided onCD as an appendix to the quarterly monitoring reports. Mr. Fesko responded that frequently the heavierfractions are left behind. Mr. Smallbeck responded that there are not many heavy fractions here becauseit was a gasoline site. Mr. Fesko stated that he would be interested in seeing the chromatograms.

ST012, Former Liquid Fuels Storage OperationMr. Wessner summarized the slides presenting the site background, contaminants, cleanup methods inplace, and the path forward. The primary contaminants for the site are petroleum hydrocarbons andbenzene.

The deep vadose zone, which is defined as greater than 25 feet below ground surface, is currently beingtreated with an SVE system. Groundwater at the site is also impacted by contaminants. The water tableis approximately 154 feet, up from 245 feet in 1978. Mr. Wessner stated that the rising groundwater ispart of the problem. After the petroleum hydrocarbons were released, groundwater levels have risen,which has resulted in a portion of the material being submerged and trapped within the groundwater.An SVE system for the deep soil operated at 93.6 % uptime during July-September. There has been a 50percent improvement in the removal rate, with 3,490 gallons removed from July through Septembercompared to 2,225 gallons from April through June. This is due to SVE system enhancements that havebeen completed. As a result of remedial operations to date, nine of 27 wells continue to operate.The next monitoring for the SVE system is scheduled for November 2012.

The OU-2 ROD groundwater pump-and-treat remedy was ineffective, so a pilot test for steam enhancedextraction technology was conducted. Currently, a Focused Feasibility Study (FFS) is being completed toevaluate new groundwater cleanup alternatives including steam enhanced extraction. In the meantime,the extraction wells used for the pilot test have been modified to provide some capture and cleanup ofgroundwater at the site. The containment system has been useful in capturing groundwater in the centralsite area and reversing the gradient to minimize off-site migration of groundwater contaminants.Operations were suspended in August for retrofitting. The system was restarted in September and isworking effectively. Seven million gallons of groundwater have been extracted and 130 pounds ofbenzene have been removed from January to September 2012. Operation of the containment system will

3


be continued into 2013 as the new groundwater remedy for the site is established.The final FFS will be submitted in November 2012. Based on the FFS, a Proposed Plan will present apreferred alternative and a public comment period will occur in winter 2012-13. The Air Force, EPA andADEQ will then sign a Record of Decision to establish the new groundwater selected remedy.A Remedial Design/Remedial Action Work Plan for the new remedy should be ready by fall 2013.

Questions asked during ST012 presentation:

Mr. Alan Ruffalo asked if there are 27 systems or 27 wells. Mr. Wessner responded that there is one bigsystem and 27 wells.

Mr. Fesko asked how many combustion units there are for the whole site. Mr. Wessner responded thatthere is one big combustion unit for all the wells at site ST012.

Mr. LeCheminant asked if the blue lines on slides 34-35 represent the spread of the plume. Mr. Wessnerresponded that they show just the water surface, and the changes in elevation represented by the linesindicate the direction of groundwater flow.

Mr. Fesko asked how many extraction wells are at the site and what the flow rates are for them. Mr.Smallbeck responded that two extraction wells are currently operating. The flow rate is 24 gallons perminute, which is being extracted strictly from the lower zone.

Mr. Ruffalo asked if the 24 gallons is water with contamination in it or is that the contamination itselfMr. Smallbeck responded that it is water.

Mr. Ruffalo asked if Power Ranch water wells were to stop pumping, would that increase thegroundwater flow gradient. Mr. Smallbeck stated that it would probably increase the gradient a little bit,but the gradient is pretty flat at this time and the Power Ranch wells are a distance away. Mr. Wessneradded that AMEC is monitoring the water levels quarterly, annually, and semi-annually across the site.On a yearly basis they have a site-wide map that would show changes like that if they were to occur. Mr.Watkin added that currently it doesn't appear that pumping of those wells has any significant influence onthe southern part of the base anyway. Mr. Wessner added that if Power Ranch were to shut down itswells and there was an impact, AMEC and the Air Force would recognize it as a result of evaluatingperiodic groundwater level measurements.

Mr. Ruffalo asked for an explanation of the first line of slide 36. Mr. Wessner responded thatpotentiometric is a fancy word for the surface of the water and the direction that it is flowing. Thecontainment system has been able to affect the potentiometric surface in order to reduce the groundwaterflow gradient, provide a degree of hydraulic capture within the contaminant source area, and reduceoffsite contaminant migration.

Mr. Fesko asked what is the natural direction that groundwater will flow? Mr. Wessner used slide 34 toshow that the natural direction of groundwater flow is to the east.

Mr. LeCheminant asked how many pounds of benzene are estimated to have been lost. Mr. Smallbeckresponded that benzene is a pretty small percentage of a petroleum hydrocarbon product; it is generally inthe percent or less than a percent range. The estimates for the free product released during the activelifetime of the former base is anywhere from 2 million to 4 million gallons.

FT002 Former Fire Training Area No. 2Mr. Wessner stated soil contamination is the problem at this site and the chemicals of concern (COC) arebenzene, chloroform, and 1,4-dichlorobenzene. There is no evidence that the site has impactedgroundwater. A ROD was put in place in 1996. It had a bioventing remedy for the soil but the soilcleanup goals were not achieved with that remedy and the system was shut down. There is currently aDeclaration of Environmental Use Restriction (DEUR) to prohibit residential use on the site because thegoals were not met. The DEUR also requires applicable soil management procedures for excavationsbelow 5 feet. AMEC has submitted a Soil and Soil Vapor Sampling Work Plan for regulatory review to

4


conduct verification sampling to determine if the ROD cleanup goals have been achieved through naturalattenuation. Soil and soil vapor sampling will occur in December 2012 and January 2013. If unrestrictedcleanup levels are achieved, then AMEC hopes to have the site closed by June 2013.

Questions asked during FT002 presentation:

Mr. Fesko asked what the goal level for benzene is. Mr. Wessner responded that he believes the benzenecleanup goal is five within soil *. Mr. Smallbeck added the ROD goals for the cleanup are slightly higherthan that because the ROD was done in 1996.

* The OU-3 ROD cleanup goal for benzene in soil is 1.4 mg/kg and the current ADEQ residential SoilRemediation Level is 0.65 mg/kg. The benzene groundwater MCL is 5 ,ug/L but groundwater impactshave not been identified at FT002.

Ms. Walrath asked what is being verified specifically. Mr. Wessner responded that contaminants ofconcern are benzene, chloroform, and 1,4-dichlorobenzene.

SS017, Former Pesticide/Paint ShopMr. Wessner provided background and a status update for SS017. SS017 is the old pesticide/paint shopand the chemical of concern is dieldrin in both the soil and groundwater. There was a removal action in2000 when soil contaminated with dieldrin was excavated. AMEC continues to monitor the groundwaterto evaluate the presence of dieldrin. There are levels of dieldrin in some wells that intermittently exceedscreening levels but there is no regulatory standard for dieldrin. The annual sampling was completed inAugust 2012. The groundwater flow direction continues to be toward the east. The results from theAugust sampling show dieldrin concentrations above screening levels in three (3) of the four (4) wells.Dieldrin has not been detected in the up gradient well since 1999. There have been no reported detectionsof dieldrin above the EPA drinking water health advisory. Based on the completed removal action and tenyears of groundwater monitoring data, the Air Force is preparing an updated risk evaluation and if itsupports unrestricted use, an Amended Proposed Plan will be prepared and presented to the public.

Questions asked during SS017 presentation:

Ms. Tennant asked when AMEC anticipates the final ROD. Ms. Lewis answered that atthis time there is no anticipated date.

Mr. Ruffalo asked if the evaluation of the groundwater will be down to the 300-foot level or will that bethe deep water wells that go down 860 to 1,000 feet. Mr. Wessner responded that the water table is 155

feet and the evaluation will be for shallow groundwater.

Mr. Ruffalo asked if that information would be made public. Mr. Wessner responded that AMEC willhave an annual report that comes out of this next sampling and it will be available in the AdministrativeRecord. Mr. Smallbeck added that it is important to realize that there are no concentrations above thedrinking water health advisory levels.

LF004, Former Solid Waste LandfillMr. Wessner said that the OU-1 ROD dealt with soil contaminants at LF004, including dieldrin andberyllium in surface soil, and the remedy, a permeable cap, was successfully implemented. Thegroundwater has started to rise and has picked up some contamination and it must be addressed. Thechemicals of concern for groundwater and subsurface soil are perchloroethylene (PCE) andtrichloroethylene (TCE).

The landfill cap is inspected annually and the last inspection was completed in October 2012. The landfillcap inspection report and recommendations are in preparation. The semi-annual groundwater samplingevent was conducted in November 2012 and the report will be submitted in early 2013. Regulatorycomments on the Focused Feasibility Study are under Air Force review.The Proposed Plan presenting the preferred alternative should be ready for public review and comment byspring 2013. The Air Force, EPA and ADEQ will then sign a Record of Decision to establish the new

5


groundwater selected remedy. A remedial design/remedial action work plan should be in place by fall2013.

Questions asked during LF004 presentation:

Mr. Fesko asked where he could find the latest groundwater data for the site. Mr. Smallbeck respondedthat the latest data was presented at the May RAB meeting. Mr. Fesko asked what the concentrations forthe last semi-annual sampling were. Mr. Smallbeck responded that the presentation is available at therepository, but in general the concentrations decreased a little bit. The saturated unit is separated intothree zones, an upper, middle and lower zone. The upper is just slightly above the cleanup level. Most ofthe contamination is in the middle zone and that has decreased from the last sampling in November 2011.The lower zone is right at the cleanup level. The contamination does not appear to be moving into theother zones. It is staying in the middle zone and has decreased. That slowly declining trend has been seenfor the last two years.

Mr. Bouchie asked if there was any idea what the cleanup method would be. Mr. Wessner responded thatit will be some sort of in situ treatment. The vadose zone will probably be treated with SVE. Thegroundwater treatment will be somewhat dependent on what is learned from the initial well. If the welldevelops as predicted, then there are two treatment options. One would be in-well air stripping. Thistechnology uses opposing flows of air and contaminated groundwater to strip the contaminants from thegroundwater. The circulation of groundwater through the wells creates a current around the well thatallows for localized groundwater cleanup. The other technology would be chemical oxidation, whichwould be injecting peroxone or hydrogen peroxide. Both options were evaluated in the feasibility studyand both could be used effectively at LF004.

Mr. Bouchie asked if rising groundwater levels are being seen at the site. Mr. Smallbeck responded yes,but less so. The groundwater has slowed down considerably in the last few years. It has risen less than afoot in the last year. In previous years the rise has been over three feet.

Mr. Anderson asked how the dieldrin and beryllium issues were addressed. Mr. Smallbeck respondedthat they were addressed as part of the cap in the mid-1990s.

Contracting UpdateMs. Lewis provided an update on contracting issues.

Regarding the MMRP site (XU403) located east of the landfill, Ms. Lewis provided site backgroundinformation (see attached slides). The Army Corps of Engineers has released a Request for Proposal forthe final munitions response action. Site excavation will begin in spring 2013. Ms. Lewis also provided anupdate on SS017. The OU-6 ROD is still pending with URS. URS is still on task to complete the OU-6ROD. A Proposed Plan meeting is planned for early spring of 2013.

Meeting Wrap-upThat concluded the information portion of the evening. There were no action items identified as a resultof the meeting.

No topics were suggested for the next meeting. Ms. Lewis reiterated that Ms. Cathy Jerrard will be theAir Force Williams Program Manager and RAB co-chair following Ms. Lewis's re-assignment.

Ms. Jerrard introduced herself and stated that she has been working for the Air Force since the mid-1990son both soil and groundwater contamination projects in New York, South Carolina, and Louisiana.

Mr. Fuchs asked for any agenda items for the February RAB meeting. There were none. Mr. Fuchsthanked Ms. Lewis for her RAB service and adjourned the meeting at 8:35 p.m.

The next Williams RAB meeting is scheduled for Tuesday, February 19, 2013 at 7:15 p.m. at the ArizonaState University Polytechnic Campus.

6


Attachments:

Sign-in Sheet

November 12, 2012 RAB meeting slide presentation

7

Forme!' Williams AFB Restoration Advisory BoardDate: 13 November, 2012 1610 Williams AR # Page 11 of 75

Please sign in. If your information has changed since you last attended, please place anasterisk (1 next to your name.

NAME/ORGANIZATION

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WilElfams AR # Page 12 of 75

Headquarters U.S. Air ForceIntegrity - Service - Excellence

Former Williams AFBRestoration Advisory Board

(RAB)

November 13, 2012

Arizona State Polytechnic CampusPeralta Hall Room 132

7171 E. Sonoran Arroyo Mall Rd.Mesa, AZ



Welcome& Introductions

Presented by:Mr. Len Fuchs / Ms. Michelle Lewis,

RAB Community Co-Chairmenand Scott Johnston

11/13/2012

Wit lams AR # Page 14 of 75

Welcome & Introductions

Mr. Len Fuchs, RAB Community Co-Chair

. Ms. Michelle Lewis, Air Force Civil Engineer Center(AFCEC), PM/BEC and RAB Co-Chair

Ms. Carolyn d'Almeida, Project Manager, U.S.Environmental Protection Agency (EPA), Region 9

. Mr. Donald Atkinson, Project Manager, ArizonaDepartment of Environmental Quality (ADEQ)

11/13/2012 Integrity - Service - Excellence


Agenda

Time

7:15 PM

7:30-8:30 PM

Topic

RAB Meeting Convenes

Welcome and introductionsCommunity co-chair remarksReview Aug 2012 meeting minutesand action items

Program Updates

UST 1114 Status Update

ST035 UpdateAug 2012 Ground Water (GW) ResultsJul-Sep 2012 Soil Vapor Extraction (SVE)Performance ResultsGW Characterization

ST012 Status UpdateJul-Sep 2012 SVE Performance ResultsGroundwater Containment Study ResultsPath forward

Presenter

Mr. Len FuchsMs. Michelle LewisMr. Scott Johnston

Ms. Michelle LewisMr. Everett Wessner



Agenda Continued

Time Topic

7:30-8:30 PM Program Updates continued

8:30 p.m.

FT002 Status UpdatePath Forward

SS017 Status UpdateAug 2012 GW ResultsOU6 Record of Decision (ROD) status

LF004 Status UpdateContracting Update

Meeting wrap-upReview action items for next meetingCall for agenda items for next meetingPropose next RAB meeting - Feb 19, 2013

9:00 p.m. Adjourn

Presenter

Mr. Everett Wessner

Ms. Michelle Lewis

Ms. Michelle Lewis

Mr. Len Fuchs


WilEliams AR # Page 17 of 75

Minutes and Action Items

Review Aug 2012 RAB meeting minutes

Action items from Aug 2012 RAB meeting

Presented by:Mr. Scott Johnston

Napkin Communications




Program UpdatesSites UST1114, ST035, ST012,

FT002, SS017, and LF004

Presented by:Ms. Michelle Lewis, AFCEEMr. Everett Wessner, AM EC

11/13/2012



Former UST 1114

11/13/2012


Former UST 1114 Location Map

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wil6fams AR # Page 21 of 75

Former UST 1114 Site Background

Underground storage tank (UST) source of release;removed in 1993

Volatile organic compounds (VOCs) andpolyaromatic hydrocarbons (PAHs) in soil

Verification soil sampling

Goal: Site closure under Tier 1 UST regulations byADEQ


Wilai ms AR # Page 22 of 75

Former UST 1114 Site Update

Verification sampling performed week of Apr 2012

No detections above cleanup levels for unrestricted use

Site closure documentation submitted to ADEQSep 2012

Received regulatory approval for site closure Oct 2012




Site ST035, FormerBuilding 760 USTs


Site ST035 Location Map

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ST035 Boundary (Former Building 760)

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WilAiams AR # Page 25 of 75

Site ST035 Site Background

Building 760 gas station and oil/water separatorGas dispensing until 1986Tank and dispensing equipment removed in 1993-1994Oil/water separator removed in 1996

Vadose zone soil chemicals of concern (COC)Benzene

Groundwater COCsBenzene, toluene, ethylbenzene, xylenes (BTEX)1,2 -Dibromoethane (EDB)Methyl tertiary butyl ether (MTBE)1,2-Dichloroethane (DCA)

Soil Vapor Extraction (SVE) system to treat COCs in vadosezone soil in operationSite cleanup regulated by ADEQ under Leaking UndergroundStorage Tank (LUST) regulation (R18-12-263)


Site ST035 GroundWaTeAiMonitoriiii OP5dateAug 2012 Groundwater Flow Direction

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6 Groundwater Monitoring Well Location

Decommissioned Groundwater Monitoring1. Well Location

Potentiometric Contour Line- (Dashed Where Inferred) (ft ems!)

(Contour Interval = 0.5 ft)

11101. Groundwater Flow Direction

Approximate Location of FormerBuilding 760

MNApproximate Location of FormerMN Underground StorageTank

Approximate Location of Former BelowGrade Product Distribution Line

Notes:

B TOOJAVV12 Monitoring Well Identification1195.15 Groundwater Elevation (ft arnal)

fl arnsl Feet above mean sea level

O 20 40 BOMr Feet AWorking Copy

Groundwater Monitoring ReportAugust 2012 Event

Site ST035 - Former Williams Air Force BaseMesa, Arizona

ST035 Potentiometric Surface Map FIGURE

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11/13/2012 Integrity - Service - Excellence 15

Site ST035 Groundadtei Monitoilen24143dateAug 2012 Sampling Event Site ST035

13 wells sampled, groundwater flow direction toward the East.

Benzene detected in 8 wells (9 wells in May 2012):ADEQ UST Tier 1 Corrective Action Standard = 5 gg/L7 wells < 5 gg/L - (8 wells in May 2012)1 well 5 gg/L - (1 well in May 2012)

1,2-DCA detected in 6 wells (5 wells in May 2012)ADEQ UST Tier 1 Corrective Action Standard = 5 gg/L1 well < 5 gg/L - (1 well in May 2012)5 wells > 5 gg/L - (4 wells in May 2012)

Concentrations of MTBE and EDB continue to be below ADEQUST Tier 1 Corrective Action Standards in all wells


Site ST035 Grouiii:Ny'ater Monitoring UpdateAug 2012 Sampling Results

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',1375.0.1,11NOOR

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* j.1

B760.RINJ17

8760 WW1)

13700-51A110fit

Legend

9 Groundwater Monitoring Well Location

Decommissioned Groundwater Monitoringef" Well Location

Approximate Location of FormerBuilding 760

umApproximate Location of FormerUnderground StorageTank

Approximate Location of Former BelowGrade Product Distribution Line

Notes:

8750-11W12 Manikeing WallIdenafication

2a

I UM I

118/1

1.2-DCA

ADEQ

kr1

UST

Pnalytleal result {aga-} equals 01 esSeedS theapplicable ADEQ UST Ter 1 Correct4eActionStandard. For MTBE, ADEQ guidance 5/00/000Incfora Correctne Action Standard 01 94 veil...henno drinking water well is effected (ADEQ. 2002).

Original/Duplicate Results

Microgram per liter

1.2-Dichloroothane

Arizona Depurknent of Environmental Quaky

The analyte was postivet,r identified, estimateddue to a men. effect

Underground Storage Tank

0 20 40 00

II.M=i Feet AN

Working CopyGroundwater Monitoring Report

August 2012 EventSite ST035 - Former Williams Air Force Base

Mesa. Arizona

ST035 COC Concentrations FIGURE

August 2012 34

Jab NO. 91111111:001

NW EIN10/2401112 amed3.1,

Stade I" s KS

ee,

......


WilEliams AR #

Sire298t635Groundwater Summary

Concentrations of benzene in the source area havesignificantly decreased since SVE startup in 2010

Toluene, Xylenes, MTBE, and EDB are below ADEQ UST Tier 1Corrective Action Standards (all wells)

Concentration of 112-DCA similar in the source area anddecreased to below the UST corrective action standards in thedowngradient well (B760-MW17).

Next quarterly groundwater sampling - Nov 2012


Wit lams AR #

gire

'tto3

5S

ourc

e A

rea

Con

cent

ratio

ns s

ince

200

8

1000

100

S 1

00 tr. R C 0

1

0.1

Ben

zene

, 1,2

-DC

A, &

MT

BE

in S

ourc

e A

rea

(Wel

l B76

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)

AM

MM

MM

mm

mr=

mm

mm

mm

mum

mM

EM

EN

UM

ME

NW

AN

IIIM

EN

MM

IMM

EM

EN

1111

1111

1111

1111

1111

WA

IMM

E11

11E

=

1111

1101

1111

3,11

11.1

111

im-a

s-a-

amim

mic

emis

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1111

1111

1111

1111

1111

1MM

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INIII

IMIII

MM

1111

111M

MIM

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ME

MM

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WA

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MM

EM

MO

MM

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EM

WIN

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mm

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ipm

."11

1101

1117

All

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=11

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alIM

BE

EE

MO

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mr7

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.111

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Jan-

08Ju

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Feb

-09

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BE

1,2-

DC

A

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enze

ne

MT

BE

Tie

r 1

Cor

rect

ive

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ion

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ndar

d

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zene

&1,

2-D

CA

Tie

r1

Cor

rect

ive

Act

ion

Sta

ndar

d

Aug

-09

Mar

-10

Sep

-10

Apr

-11

Nov

-11

May

-12

Dec

-12

Dat

e

11/1

3/20

12In

tegr

ity -

Ser

vice

- E

xcel

lenc

e19

Wildlams AR # Page 31 of 75

Site ST035 SVE System Update

Jul - Sep 2012

99.6% operational uptime

PHC removed - 3,980pounds or 646 gallons- (878gallons Apr-Jun 2012)

11 of 15 SVE wells operating



Site ST035 SVE System Performance35,000

30,000

25,000

20,000

15,000

10,000

98.4% The value above the bar represents thepercentage of time the system was

operational during that sampling period.

98.5%

99.8%

99.9%

91.9%

0 - 1 I2,000

0

5,000 - 99.b%

Oct-Dec 2010 Jan-Mar 2011 Apr-Jun 2011 Jul-Sep 2011 Oct-Dec 2011 Jan-Mar 2012 Apr-Jun 2012 Jul-Sep 2012

Average Quarterly TPH Mass Removed (Cumulative Volume TPH Removed

99.7%

18,000

- 16,000

- 14,000

- 12,000

- 10,000

- 8,000

- 6,000

- 4,000


lams AR # Page 33 of 75

Site ST035 SVE System Summary

Average mass removal of PHC is declining as expected

. 16,500 gallons of PHC removed to date

SVE system continues operation within permit emissionrequirements

. Next performance sampling Nov 2012


wI,,,ams AR # Site ST035Groundwater Characterization

Well installation in former source area commenced inOct 2012

Downgradient monitoring well completion anticipated inNov 2012.

Sampling scheduled for Jan-Feb 2013



Site ST035 Path Forward

Complete groundwater characterization and performremediation as needed.

Continue SVE operation and groundwater monitoring

Achieve site closure under LUST regulation (R18-12-263.04)



Site ST012, FormerLiquid FuelsStorage Area


Site ST012 Location Map

Legend

ST012 Boundary

C:1 Former Williams AFB Boundary

Pecos Rd

0 0.25 0.5

Miles

Job No. 910111000PM: EWDate. 05/09/2012Scale = 0.5 mile

ThnliM.1

WreM.0map

MMAI.n1IMOkdbfalirainextloraey mesio[WIM.,haMaia.WWpq,M.


5T012 Site Location MapFIGURE

1-2

amec



Site ST012 Site Background

Former liquid fuels storage operation

19 USTs and piping were removed in 1990

COCs in soil and groundwater are petroleum hydrocarbons andbenzene

Shallow soil (< 25 feet deep) cleanup achieved (1996): OU-2 ROD1992

Deep vadose zone soil (> 25 feet deep) currently being treated bySVE: OU-2 ROD 1992

Current water table at -154 feet up from -245 feet in 1978

OU-2 ROD Groundwater pump and treat remedy ineffective-alternative remedies being evaluated in a Focused FeasibilityStudy (FFS)



Site ST012 SVE System Update

Jul Sep 2012

93.6% operational uptime

PHC removed - 22,900pounds or 3,490 gallons-(2,225 gallons in Apr-Jun2012)

9 of 27 SVE wells operating



% Site ST012 SVE System Performance200,000

180,000

160,000

140,000

120,000

100,000

80,000

60,000

40,000

20,000

0

gP3A0eeec0,

,4cv rt, r rP 0 rP r9 (9 5) r9 5) 5) 9 2 9

.§` 09 ec,_ .c ,§ c, 0 c c. 9 c, 01, rt,

v- c- \`0 .P \o coe c e 40' v) coe9 ,Q0 coe9

N" 0° 0° 1P9 0611P9c 06 11 VVV- 0 P. 0Average Quarterly TPH Mass Removed Cumulative Volume TPH Removed

The value above each bar representsthe percentage of time the SVE system

was operational during that quarter.

dirn

0)

rnrn

c*"co0)rn

6m m0)

For the 1st quarter of 2010,the system only operated

cx?rnrn

to

diCO

1-41

300,000

250,000

200,000

150,000

100,000

50,000

0



Site ST012 SVE System Summary

Average PHC mass removal rate increased during thequarter as a result of SVE system improvements.

PHC removed to date 258,000 gallons

Next SVE performance monitoring Nov 2012


Site ST'01"2 GrotilictviaterContainment System

Existing extraction wells and equipment configured to allowoperation of a modified pump-and-treat system

Lower Saturated Zone (LSZ) extraction wells targeted forpumping

Extraction operations began in Jan 2012

Operations temporarily suspended in Aug 2012 for retrofit;restarted in Sept 2012


W11613ms AR # Page 43 of 75

ST012 Groundwater Containment System

System Retrofits


Site ST012 arostadwater Containment. System

LSZ Potentiometric Surface MapJul 2012 - 25 gpm Extraction

ST012.W.S64,

7104,24 \ '-,)62

if' .;e' 1

e/. \-__ \

5101.t4enw

%%F0,14:1310.

N 6

2R6a

O

2,1:S2D

5T012-LSZ04

012-4netwin

(5. 1103.450.202 r

ST012 -W38

at0 12.n I.: 0570124113

1194.676695

ST012.W01

51002 -76371183.96

I '',. . '54/I I 3101244,24/ I .4 o.eaa

I ../. '.4I .' ....." ....

fI .." -"" -

.1 -- -

..."....1-- ir-- f---- - f- - - -

---


4.

Legend

Groundwater Containment MonitoringWell Location

Groundwater Extraction Well LocationOnly Pumping Wells Presented)

(Combined Average Extraction Rate was25 gpm at the time of monitoring)

Potentiometric Contour Line (ft ems!)(Dashed Where Inferred)(Contour Interval = 0.5 ft)

=.1111- Groundwater Flow Direction

Benzene Concentration (5.0 pg1L) inGroundwater - November 2011(Dashed Where Inferred)

LSZ Groundwater Capture Zone

Fenceline

ST012 Site Boundary

Notes:

S1In2-Re-2C Monitoring Well ldenliltation113.62 Gilburielwete, Elevaliful (5 451511869' Benzene Concentration lyg/LI

wg4L Mleloararti per liter

F The analyte was poseWely identified but thea0uleCia4ed Conotneatice it an estimationatewe She eeteellon lune 444 below thereporting

1 west Feel chose irte.sr, sea level

awnLSZ

Gallons per Minute

Lbw*, 38tulet441 10114,

o 25 50 100® Feel AContainment System

July - Sept 2012 Status ReportSite ST012 - Former Williams Air Force Base

Mesa. Arizona

ST012 Containment System LSZ FIGUREPotentlemetric Surface Map

27 July 2012 3-2

Jcb No 0016100.01P-1.1. EWScan 10130/2012 amecc9Scale. 1" 4 +ye'

"--.......

33

Site ST012 arostadwater Containment SystemLSZ Potentiometric Surface Map

Aug 2012 No Extraction

- - ........error zerros--

118821 1c \,362

57012R121ICIRM811NO2__/ ;18E805,""

87012-MWHOIC1187.09

$8092woe1196 71

7,

/ f

510124199290.590

Legend

Groundwater Containment Monitoring'''' Well Location

Potentiometnc Contour Line (ft arnsl)- (Dashed Where Inferred)

(Contour Interval = 0.5 ft)

Groundwater Flow Direction

Benzene Concentration (5.0 pg/L) in- Groundwater - November 2011

(Dashed WhtrC Inferred)

Fenceline

Ili] 5T012 Site Boundary

Notes;51-012RP2C Mon8oring Well Idenefication

"W" Groundwater Elevation (ft amel)8850 Benzene Gancentrelket bie/L.)

& Microgram per WEN

F The anglyte woo p081lively efentihee Ole Theassociated concentration is an estimationabove the detection limit and below thereporting limb.

ft firMel Feet above Mean sea level

LSZ Lower Saturated Zone

0 25 50 100

Feel

Containment SystemJuly - Sept 2012 Status Report

Site ST012 - Former Williams Air Force BaseMesa. Arizona

ST012 Containment System LSZ FIGUREPotentiometric Surface Map

14 September 2012 - No Extraction 34

Job Mg. 9101111NO1PM. ESN ampor,br nrawayixScale! 1' a TINT


Site ST012 arostadwater Containment SystemLSZ Potentiometric Surface Map

Sep 2012 24 gpm Extraction

erST012-W14

11.3.

51012.013,10

[1312.1.,3

..__._0.- #.

....,r ..-,..

I

061012LS204 r

-ST012-MWNOiC

1104., I

i ' ., ST012-WOO

IF

51011-513-21916.5 36

.111.12

ST012-Wal 61012-Wen11a5.7<

87012-1V091186.69


Legend

Groundwater Containment MonitoringWell Location

Groundwater Extraction Well Location(Only Pumping We115 Presented)(Combined Average Extraction Rate was24 gpm at the time of monitoring)

Potentiometric Contour Line (ft ams1)(Dashed Vetere Inferred)(Contour Interval = 0.5 ft)

11111. Groundwater Flow Direction

Benzene Concentration (5.0 pg/L) in- Groundwater - November 2011

(Dashed Where Inferred)

LSZ Groundwater Capture Zone

Fenceline

ST012 Site Boundary

Hates:

Start-ea-aC moralising Wel IdaelfficationGroundwater Elevation tR &nob

3810 Benzene Corionitrow [vs/L)

usit Microgram per liter

F TOO anaryte was positmato elentirowl Oat 1110eseeciated cancentretinn is an entirnatinnabove the deteclion Emit and below thereporting limit.

It arnel Feet atone mean aea level

gpm Canions per minute

ISO Lew.. Saturated Zone

0 26 50 100

Fool

Containment SystemJuly - Sept 2012 Status Report

Site 5T012 - Former VVilliams Air Force BaseMesa, Arizona

5T912 Containment System LSZ FIGUREPotentiometric Surface Map

27 September 2012 3-5

Jot Nu. 81u 81 1:11110001PAC -Eng ame0Smile, 1- e 10E

"Xtr.Fr.':=1:="frZtrtl, -,,,,......r.... e

Sitd ST01"2 GrodliedWaterContainment System

Extraction activities influence the potentiometric surface inLSZ

7.0 million gallons of groundwater extracted and treated fromJan through Sep 2012

130 pounds of benzene removed through Sep 2012



Site ST012 Path Forward

. Final Focused Feasibility Study to be submitted Nov 2012

. Proposed Plan/public comment Winter 2012/2013

. Record of Decision Spring 2013

. Remedial Design/Remedial Action Work Plan Fall 2013

. Ongoing groundwater and SVE performance monitoring andoperation of containment system




Site FT002, FireTraining Area

Number 2

11/13/2012

adualiaaxa - adladas - Xj!dgaluidew uopeaoi ZOOld

cuozpv'eseneseg 0010j Jrpg SLUCIIIIAA lOWJOA

mIm . ...anft. . a va 1,ra wI,wcei 0

a410 Os* an0 pap ur pu 7004 P.0 Inal00,WI 10001110 16 ,A .r.110,0.4 W. 4n

pue PA OM It 41. POW, ...ey a. u...11.

01!1-li 9'0 = ..L :a1035Lg:z/LosiD :a;e0

M :ord6000666068 ON clor

SE '0 0

P LI-SO Dad

kepunage oje swelipm JOWA0j

fupunoa zoo_L

puabai

Pu-piDu-swu!mm

---no'-- ---:, :'...4t. - el-Ara

dew uone307 ZOOld enSSL Jo OS abed # :IV sue-UT-FM


Site FT002 Site Background

Fire protection training activities (1958-1991)

Soil COC: benzene, chloroform, 1,4-dichlorobenzene

No evidence of groundwater impact

OU- 3 ROD 1996; Soil Remedy (bioventing) implemented in 1996-97

Final soil cleanup goals for unrestricted use not yet achieved

Declaration of Environmental Use Restriction (DEUR) to prohibitresidential use and require soil management below 5 feet


wil(liams AR # Page 52 of 75

Site FT002 Site Update

Draft Final Soil and Soil Vapor Sampling Work Planunder regulatory review, submitted Sep 2012

Verification sampling Dec 2012

If ROD cleanup goals are achieved, site closuredocumentation Mar 2013

Anticipate regulatory approval for site closureJun 2013




Site SS017, OldPesticide/Paint

Shop

11/13/2012

E17 adualiaaxa - adladas - Xj!dgalui ZI.OZ/£1) /1.1.

?ewedm! uonmooi N!S LI.OSS

euozpvaseg a010j 'IV SwemJeLMOJ

4WW 791. 'KW r..ar.:gwa dewvs 41 wiw we cur wo uns e

ma Ow 514.1 1170 1..16.10Ewn,, Paw,woes., wo 1C uwoomo. Loon seugo,1 mom Ow WU

.wl!Lu

ELOEIglIEDM3

LOOOLI L OL 6

50 5Z0 0

P Goad

luepunoe Euv sweilli JOL1.1.10

Aiepunoe zi.oss

pua6a7

Sh

Nr\

-Pei -PI e ! =sup ell

7

O

a

dew uopepo7 NIS LLOSS NISSL Jo D'S eb-ed # 21V sui-e-T-9-1E-Fm

Wil6fams AR # Page 55 of 75

Site SS017 Background

Old pesticide / paint shop

Soil and groundwater COC: Dieldrin

Removal action for soil completed in 2000

Ongoing groundwater monitoring (Annual Aug)

Draft OU-6 ROD Mar 2012



Site SS017 Site Update

. Air Force preparing updated risk evaluation

. Provided risk evaluation supports unrestricted use, prepareAmended Proposed Plan

. Annual groundwater monitoring event completed - Aug 2012


WilEliams AR #

SPite57g7617

Aug 2012 Groundwater Flow Direction

Former Military DogTraining Area

Alk

!Forrngr Lucaof Old Pestici

I Paint Shop

FG1°r°

un dwaterD'irection

.005 ft /ft) 0501%7..004,4

95017-1.1W02 SMT4W,P.F1

Oki 119 4I Ar.

am*

Unity Ave

1!ti

U

1

Legend

I: Groundwater Monitoring Well Location

Potentiorretrc Contour Line- (Dashed Vihere Inferred) (ft erns!)

(Contour Interval = 0.5 Ft)

1110- Groundwater Flow Direction

El Razed Building Location

C::: S8017 Boundary

Notes:

ssor-lierm Mooltonnn Well tdentrketion1190 04 Groundwater Elevation or ems!)

ft erne! Feet above mean sea level

0 10 20 40

reel A

Working CopyGroundwater Monitoring Report 2012 Event

Site SS017 - Former Williams Air Force BaseMesa, Arizona

55017 Potentiometric Surface MapAugust 2012

nouns3.1

Jot No 9101110061PM. CM,ft_10192012

Sale 9 - -do amee9aM=7:11=.1.EZE=Si'


WilEliams AR #

SPite58g7617

August 2012 Results

Dieldrin concentrations above EPA regional screening level(0.0015 µg /I) (3 of 4 wells)

Mann-KendallStatistical

nalysisSS017- MWO1 <0.000459 Decreasing

SS017- MWO2 0.0505 No Trend

SS017- MWO3 0.00952 F Decreasing

SS017- MWO4 0.0134 F DecreasingF - Below Reporting Limit (RL) but above Method Detection Limit (MDL)

. Next annual groundwater sampling - Aug 2013


WilEliams AR #

SPite59g7617

Historical Results

SS017-MWO1

Oct-03 <0.003 UAug-04 <0.004 UApr-05 <0-0 01 UJul-06 <0.006 UJun-07 <0.0067 UJul-08 <0.006 U

Aug-09 <0.000204 UJLAug-10 <0.001 UAug-11 <0.000188 UAug-12 <0.000459 U

0

SSOS7AIWei

Former Military BogTraining Area

Former Location,of Old Pesticide/

Paint Shag

sso17-mwo

P80012 MW04

!Si

i E

iF

55017-MWO3Oct-03 0.027 FAug-04 <0.004 UApr-05 0.014 FJul-06 0.013 FJun-07 0.011 FJul-08 X0.00652 U

Aug-09 0.0316 JAug-10 a 00364 JAug-11 0.00444Aug-12 0.00952 F

5S017-MWO4Oct-03 0.009 FAug-04 <0.004 UApr-05 <0.001 UJul-06 <0.0061 UJun-07 <0.0062 UJul-08 <0.00645 U

Aug-09 0.00439 JAug-10 <0.001 UAug-11 0.0023Aug-12 0.0134 F

Legend

Groundwater Monitoring Well Location

Ej Razed Building Location

r] 55017 Boundary

Notes:

3391741W02 Monitoring Well Identification

[00014.1 °waren Ceweentrolien los11

11300231 Results sunned the U.S. EPA Peglen IXRSUPRG of 0.0015 Ka

pill Microgram per liter

EPA Eaviremmenist Protedian AgtenCY

F The Seigel metre was ooseirely identifiedbele. the PA end orince Ins MDL

The endure was peeilnitly identified. bet teequentilalion is an mairealion

L The res,1/ non-eetael was homed low

RIDL, Meitner] Etalwetren Lena

PRO Prelimieebi Pernediense Goal

RL Reporting LAsit

RSL Reglonal Scrwanng revel

The erielyis wry ANOWNIdter. bat not detected

9 10 20 40

Feel

ra

A

Historical Results of Dieldren Analysisin Groundwater (2003 to 2012)

Site SS017 Former Williams Air Force BaseMesa, Arizona

Job atontereu1:fet En,Eletc_reQecolzScale, 1 =a0 ame69


Wildlams AR #

SPite6°8t7o1 7

Groundwater Summary

Upgradient well (SS017-MW01) has been non-detect since 1999

No reported dieldrin above EPA Drinking Water Health Advisoryof 0.2 pg/L (10-4 Risk) since 1998

Mann-Kendall test indicates downward trend (or no trend) ofdieldrin concentrations in all 4 wells

Updated risk assessment will include an evaluation ofgroundwater




Site LF004, Landfill

11/13/2012 50


Site LF004 Site Location Map

Ray-Rd

WWiams,Field,Rd

Legend

LF004 Boundary

CZI Former Williams AFB Boundary

aE

0

Pecos -Rd

0.25 0.5

Miles

Job No 9101110001PM: EWDate: 07718120112

Scale: = 0.5 mile

me map Om. Pe4 nap be...ealea .11. al &a and reasonable. ape and....el. nw *ph A MEC. 1Npeal 1.11011mr 41111 fnp hasbre comme Ire land .rvere or, and anv Ott prry. ula 3map taMPS.0104 ve.antips oil any 1.1 AMEL a.m.* no IMMO.

inor net wnal......0.an$ such mint such at .inntsmOnil


LF004 Site Location MapFIGURE

1-2

amec



Site LF004 Site Background

LandfillFormer solid waste landfillOperated from 1941 to 1976Closed in 1995 with a permeable soil cap(0U-1 ROD 1994)Rising groundwater table

COCsDieldrin and beryllium in surface soilPerchloroethylene (PCE) in soil and groundwaterTrichloroethylene (TCE) in soil and groundwater

Integrity - Service - Excellence

Wil6fams AR # Page 64 of 75

Site LF004 Update

Landfill cap inspection and repairs completedOct 2012

Landfill cap inspection report and recommendationsin progress Nov 2012

Next semi-annual groundwater sampling eventNov 2012


wS- 6RLF004 PUpdateLandfill Cap Repairs

--.... -r-.-.- .I.1..._.1%, ' I. 5 t I 1 1 1 4.. . 1. e..1 i il . ,. ,, ,

I -1 1 --W. ,, 7 +7,..-1, 4 -. C-T-,-..-.....-4 ,...., i.,,....-1('.1.

..A:" ''' A '

6 ....,. 5

\ k -k. ' ' 1 r " AI. .. 1 1. -1 C4.1.il

' ' %.' .1 .' I `

` tit Ilk a4 it* . a . , 4. . .. , I

. .4. ; - - ' .., al- I .1- I - I.' ... 1- -..... 1..-..-7,:t...-4... 1,1,-JFW . 1.4.471.1%1 ....a, -4- - ..-w-.....::, a: - . , ., -.....``. ........ ...." `OM 11:01. 1. -

.

I=

. _.

, i - .

-

-.,_,.- -

. .._

4.... _.,:....... . ...-- , .r

, - _ . -:;- ,...._ .... .. . .

- . 1.

_ +..;

wS- 6RLF004 PUpdateLandfill Cap Repairs


Wilafams AR # Page 67 of 75

Site LF004 Path Forward

Regulatory comments on the Focused FeasibilityStudy under Air Force review

Proposed Plan/Public Comment- Spring 2013

Record of Decision- Summer 2013

Remedial Design / Remedial Action Work Plan-Fall 2013

Continue groundwater monitoring and landfillmaintenance

Integrity - Service - Excellence



Contracting Updates

Presented by:Ms. Michelle Lewis

AFCEC

11/13/2012

Wil8 lams AR # Page 69 of 75Munitions Response Site XU403

Site History

.50-cal un-fired shells discovered in Oct 2003 by ADEQ.

AFCEE and URS performed site walk in Aug 2007 and confirmed presence ofmunitions debris on the ground at PNDA.

Phase I Investigation (Jan 2009): included a geophysical survey and visualsite inspection. Various munitions debris discovered on ground. Phase I didnot include intrusive actions.

Phase II Investigation (Jul 2010): discovered munitions debris, small amountsof munitions and explosives of concern (MEC), empty Chemical AgentIdentification Sets (CAIS) bottles; and installed security fence and safety signs.

37 acres designated as Military Munitions Response Program (MMRP) siteXU403.

34 acres were cleared and determined to need no further action.

3 acres were designated as XU403a and identified for additionalinvestigation.

Phase III Investigation (Jul 2011): MEC removal for XU403a; work suspendeddue to discovery of intact CAIS bottle with residue.


Wit lams AR # Page 70 of 75Munitions Response Site XU403

Site History

Phase III

Completed detector-aided visual surface clearance over XU403a(see site map next slide).

Removed munitions debris and MEC from surface.Removed metallic debris that would interfere with subsurfacegeophysical survey.

Completed comprehensive grid-based geophysical survey.

Began subsurface MEC identification, removal, and disposal.

Fieldwork suspended after discovery of intact CAIS bottle withresidue.

Army's Chemical, Biological, Radiological, Nuclear and High YieldExplosives (CBRNE) team destroyed CAIS bottle and contents.


WilElIams AR #

Munitions Response Site XPLaJg4013ofA7r5ea 1

Final Munitions Response Action

Current Status

Army Corp of Engineers Huntsville Engineering andSupport Center has released a Request for Proposalsfor the final munitions response action.

Site walk is scheduled for tomorrow morning.

Proposals are due 21 Nov 2012




Meeting Wrap-Up

Presented by:Mr. Len Fuchs/ Ms. Michelle Lewis

RAB Community Co-Chairmenand Scott Johnston, Napkin Communications

11/13/2012


Meeting Wrap-Up

. Review action items

Call for agenda items for next RAB meeting

Schedule next RAB meeting (Proposed date Feb 19,2012)

Meeting adjourned




Meeting Adjourned

11/13/2012 63

FINAL PAGE

ADMINISTRATIVE RECORD

FINAL PAGE

Documents

Williams AR # 1610 Page 1 of 75 - AFCEC Home