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Department of Energy'

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Albuquerque Op' rations OfficeP.O. Box 5400

Albuquerque, New Mexico 87115

(ET 0 6158 - 'tu:G.N._

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m. = ara e. mwuns ef f.,. 4,3Licensing Branch 1 O// O OjUrimium Hecovery Field Office /,I, fj % "

f , gmelear Iegulatory Comission, Region IV p pP.O. Box 25325 C & )Denver, CO 80225 h 9 j$ 4

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Dear Ed,, 1 4 ,

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Diclosed for your infornation is a copy of Project Interface Document

(PID) No. 03-S-12 for Durango, Oolorado. 'Ihe changes were necessary as

noted on the enclosed PID.

If you have any questions or coments concerning the above, please contact

Elizabeth Damler of my staff at (505) 846-1224.

Sincerely,

& ,

W. John Arthur, IIIProject MungerUranium Mill Tailings Project Office

Enclosure

cc w/o enclosure:D. m nn, tMIPAD. Gillen, NRC

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UMTRA PROJECT OFFICE '<

PROJECT INTERFACE G3CUMENT |^ ~ ~ * * * " *-

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s1te Date PID No. $b No. YfC Pro No.Durango, CO 09/27/88 03-S-12_ 03 .

Originator and Location Phone Organization % wer By: References:R. E. *.laddington - Albug. (505) 766-1667 MK-F Subcontract:

Radon Barrier Test Fill j

Description of Problem and Recommended Solution O clartricatton s Change

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iPROBLEM: The permeability of the proposed radon barrier material needs to be determined |

by construction of a test fill. fio provision for such fill was in origir.al -

specifications.

SOLUTI0th Prepare new specifications section (02220) covering the cons.truction of a test |fill using radon barrier material with bentonite added. Specifications j

3 Section 02220, Rev. O, is hereby made a part of the Durango Subcontract !Documents. ;

Criginnt h M % 88Signature g [/ Date

Disposition pApproveo O ossapproveo D pproveo as hotedA RAC sit Mana er MfAlh /o/F/BRCr1teria Change? O res 3 No RAC Project Contro ,\ N M / /h.N-fg(If res. DOE approval required) -

1

gg /[ RAC Construction Engineer _ *[ / # y[fyRevfewed for Qualfty '

Requirements # D (n2/e IO/4/MU 51gnature Date

Distribution kase Location hace Location Cost /Ilme Est. ;

RAC Site Mgr. RAC Constr. Engr. Mgr. O Attached iO Not Required iDOE Proj Engr. RAC Qual. Mgr.

_

O Dot Approval !TAC site Mgr. other

RAC site Qual. Engr.RAC Hs4E Mgr. '

1744K MK-o67-MM( t oI84)Revision I,

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SECTION 02220 _c5CiiON 02220'

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TEST FILL' '-

PART 1 - GENERALr, 'f

1.1 SCOPE -

A. This Specification Section covers the following:

1. Construction of a test fill.

2. Furnishing assistance in sampling and testing work to,

be performed by ' others during and after test fill; construction.

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3. Removal of the test fill and r'estoration of the testfill areas. .

4. Subcontractor is advised that some delays may resultdue to required testing.

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B. The work of. this Section shall also conform to the ap- ;

plicable provisions of Section 02200. The requirements '

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specified herein are supplemental to the requirementsspecified in Section 02200.

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1.2 WORK NOT INCLUDED'

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Temporary roads required for access to construction of the,

test fill will be considered part of the construction of '

temporary facilities specified in Section 01500. '

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1.3 RELATED WORK

A. Special Conditiont.: Definitionsi

B. Section 01300 - Submittals

C. Section 02110 - Site Cloatingi

D. Section 02200 - Earthwork

I E. Section 02935 - Seeding h

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Document No. 4005-DUR-S-01-02790-00Issued for Constructior.-Revision 0t

Test Fill 6625SDUR 02220 - 1 092988

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{ 1.4 TIME OF COMPLETIONI.

,The Subcontractor shall start work under this Section

| within 14 calendar days of receipt of this contract, and'

shall complete the work within 14 calendar days from thestart of construction of the test fill. The Subcontractorshall commence work under this Section when the meanaverage daily temperature is above 32'F prior to winter,

| weather conditions.

1.5 DEFINITIONS

i A. Test Fill: The test fill shall consist of a constructedI pad 50 ft. x 100 ft. in surface dimensions excluding con-| struction ramps and side slopes. The pad shall be 2 ft.i thick constructed on a 12-inch compacted base. The com-

pacted base shall be constructed on compacted subgecde.This pad shall be constructed of Bodo Canyon radon barriermaterials mixed with a minimum of seven percent, byweight, sodium bentonite.

B. Other definitions shall be as specified in Section 02200 -

Earthwork..

1.6 APPLICABLE PUBLICATIONS

A. The Publications listed below form a part 02 this Specifi-i cation to the extent referenced. The publications arei referred to in the text by the basic designation only:

1. Applicable Publications as specified in Section02200 - Earthwork. -

2. American Petroleum Institute (API): '

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Spec 13A-1985 - Specifications for Oil-Well Drilling-Fluid Materials.

RP 138-1985 - Standard Procedure for Field Testing ofDrilling Fluids.

1.7 QUALITY ASSURANCE

Quality assurance for the test fill shall conform to Sec-tion 02200 - Earthwork, and as specified in Article 3.6.D.

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Test Fill 6625SDUR 02220 - 2 092988

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I1.8 SUBMITTALS 1.3 6 dom t A ubSi *

A. General submittal requirements are specified in Section01300.

B. The Contractor will provide a plan showing the layout anddetails of the proposed construction. The plan shallshow: Location of the test fill, location of borrowexcavations for the test fill, plan and sections of.

proposed test fill. The Subcontractor's constructionprocedures shall ensure that the test fill will beconstructed under conditions similar to the constructionof the tailings embankment. Equipment used on the testfill shall be the same or equivalent as equipment used inconstructing the final tailings embankment cover.

C. The Subcontractor shall submit to the Contractor forreview, 30 days before removal and restoration of the testfill, a plan showing the layout and details for removal ofthe test fill and restoration of the site.

1.9 TEST FILL LOCATIONS

Test fill shall be constructed at a site convenient to and'

at the option of the Contractor. The test fill shall belocated to avoid any conflict with archaeological depositsor present human habitations. The location shall be asapproved by the Contractor.

PART 2 - PRODUCTS;

2.1 FILL MATERIAL

A. Radon Barrier Materials: Radon barrier materials shall be~

from the Bodo Canyon borrow area. Material characteris-'

tics and borrow excavation shall conform to Section 02200Earthwork. The materials shall be excavated from-

representative areas of the borrow source to be designatedby the Contractor.

B. Base Materials: Base materials shall be radon barriermaterials as referenced above.

C. Bentonite:

1. Bentonite shall be untreated sodium bentonite, suit-able for use in a variety of liquid or effluent condi-tions, "Envirogel-200', as manufactured by Wyo-Ben,Inc., Billings, Montana, or approved equal.,

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| Document No. 4005-DUR-S-01-02790-00Issued for Construction-Revision 0

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2. Bentonite shall meet the requirements of Specification13A of the American Petroleum Institute. The Subcon-tractor shall submit to the Contractor a certificateof Compliance for each separate lot of bentonite.

2.2 EQUIPMENT

A. Tha Subcontractor shall furnish all equipment and facili-ties required to perform the work of this Specification.The equipment and facilities utilized for the radonbarrier in the test fill shall be the same as will be usedfor the embankment radon barrier construction, and shallbe subject to approval by the Contractor.

B. Compaction Equipment: Compaction equipment shall be a CAT825 or equivalent.

C. Bentonite Spreader: The spreader shall be a fertilizer-type spreader capable of applying bentonite to the soil inan even manner with an adjustable, controlled speed.

D. Mixer: The mixer for mixing bentonite with the radonbarrier material shall be capable of thoroughly mixingbentonite, soil and water to a controlled depth to aminimum of the loose lift thickness. The mixer shall be arototiller-type mixer such as the Bros Mixer or equivalent.

E. A pug mill may be substituted for the bentonite spreaderand mixer.

PART 3 - EXECUTIOil .

3.1 DUST C0tiTROL-,

Dust control shall conform to Section 02200 - Earthwork.,

3.2 EARTHWORK - GENERALI

A. Applicable provisions of Sections 02110 and 02200 shallapply to the work of this Section.

D. The Subcontractor shall verify that dewatering and drain-age facilities shall be in accordance with the requirementsof Section 02141 to ensure that ground water or surfacewater concerns do not adversely affect the test fills,

i during construction or during sampling and testing activi-ties..

Document No. 4005-DUR-S-01-02790-00Issued for Construction-Revision 0

| Test Fill 6625SDUR 02220 - 4 092988

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C. Earthwork shall iconform ito clines? 'andw gradesu indicated Jon y n:n s indithe plan and details an approved by the. Contractor. '. *re.* *

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3.3 EXCAVATION

Excavation shall conform to applicable provisions of Sec- |4

tion 02200 Earthwork, except for those requirements-

affecting contaminated materials. Explorations have notindicated the presence of contaminated materials in theBodo Canyon Borrow Area.'

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3.4 MIXING BENTONITE.

; The full 2 ft. thickness of radon barrier material on the50 ft. width bentonite section of the test fill shall be -

thoroughly mixed in layers as specified elsewhere with a1 minimum of seven percent, by weight, of sodium bentonite.!>

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3.5 FILL CONSTRUCTION,

A. General Requirements for test fill construction shallconform to.the applicable provisions of Section 02200.

B. Additional placing requirements for the test fill section[,containing an admixture of sodium bentonite shall be as

follows.;

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1. Bentonite shall be distributed over unrutted material ;4

! to avoid pockets of concentrated bentonite in the i

! fill. Bentonite applied with a spreader shall be fspread with a fertilizer type spreader capable of con- '

trolling the rate of application and shall be applied,

' in two passes overlapping each other.,

| 2. The amount of mixing shall depend on the soil type,t

1 initial soil moisture and the grade of bentonite. The ;

i speed of the mixer shall be controlled to minimi:e '

1 loss of bentonite in the atmosphere.

3. If a pug mill is substituted for the spreader and ;

mixer, the mixing shall depend on the soil type, [initial soil moisture and the grade of bentonite. '

Transfer of the bentonite / soil mixture onto the testpad shall be performed such that segregation is

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minimized with the placed material subject to approval t

by the Contractor. The pug mill shall be operated to [minimi:e loss of bentonite into the atmosphere.

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Document No. 4005-DUR-S-01-02790-00,

Issued for Construction-Revision 0 ;

Test Fill 6625S r

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4. Soil moi.:ure content shall be less than the optimummoisture as determined by ASTM D698 before bentonitemay be placed. Water shall be added only after drymixing of soil and bentonite is complete. Materialwith an initial moisture content above optimum shallbe scarified to accelerate drying before bentonite isplaced. After soil and bentonite mixing is complete,

F water shall be added by methods which will provide amoisture content within 0 to plus 3 percent of theoptimum moisture content during the compactioneffort. Water shall be added and mixed in a mannerapproved by the Contractor which will provide uniformmoisture content throughout each lift to achieve thespecified density.

C. The radon barrier test fill shall be compacted as speci-fied in Section 02200 - Earthwork, but shall not be lessthan 95 percent for the base materials and shall bebetween 100 and 102 percent for the radon barriermaterials. The subgrade shall be compacted to a minimumof 90 percent prior to constructing the base pads.

D. Field Quality Control shall be as specified in Section02200 Earthwork, with the exception of the testing-

f requency which shall be as follows: The in-place density.

and moisture content tests will be done utilizing sand '

cone or nuclear methods to check the density, to assurethat densities do not exceed 102 percent for the radonbarrier materials. There shall be a minimum of two sandcone / nuclear density gage correlation tests performed perlift of material placed. The classification tests andgradation tests will be a minimum of two per lift for theradon barrier material prior to spreading and mixing ofbentonite and two per lift after placement and mixing ofbentonite. Testing of the characteristics of sodiumbentonite materials shall be in accordance with Recom'-monded Procedure 138 of the American Petroleum Instituteat a frequency to be determined by the Contractor.

E. Representative areas of the borrow source shall be placedand compacted on the radon barrier test fill. The maximumloose thickness of each lift shall be 9 inches forsoil-bentonite mixtures.

F. The final lift of the radon barrier test fill shall begraded and rolled with a smooth drum roller producing asmooth, level surface to facilitate permeability testsampling. The final elevation shall ensure that the testfill is a minimum of 2 feet thick radon barrier materialplus 7% bentonite, with each of the borrow areasrepresented.

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Document No. 4005-DUR-S-01-02790-00Issued for Construction-Revision 0

Test Fill 6625SDUR 02220 - 6 092988

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3.6 ASSISTANCE Ill .sAMpCING AND ETESTING N L M A.a L:St idG

A. Sampling and testing of the completed t'est fills will beperformed for the Contractor by others. The Subcontractorshall be required to furnish facilities and support forthese sampling and testing Lativities, generally, asfollows:

1. Furnish a back-hoe and operator to assist in thesampling and testing process over a period of approxi-mately 40 hours.

2. Cooperate with the Contractor in the completion of theon-site sampling and testing program.

<

3. Supply three laborers who will be directed by theContractor to help carve samples for testing. "

4. Supply the laborers with a minimum 24' chain saw withcarbide tipped chain, shovels,, picks, and kitchentools for carving samples.

3.7 FILL REMOVAL AND SITE RESTORATION

A. The test fill shall be removed prior to completion ofembankment construction and the area will be restored andseeded as specified in Sections 02200 and 02935.

B. Test fill material may be utilized in the construction ofthe embankment as required by the Contractor.

3.3 SURVEYING, LOCATION AND THICKNESS

Surveying, location, and thickness checks will be providedby the Contractor,

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PART 4 - MEASUREMENT AND PAYMENT *;

4.1 MEASUREMENT

A. Measurement for payment for construction of test fill willbe by the lump sum.

B. Measurement for payment for furnishing and mixing bento-nite will be by the tons of bentonite furnished and mixed.

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Document No. 4005-DUR-S-01-02790-00Issued for Construction-Revision 0

Test Fill 6625SDUR 02220 - 7 092988

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C. Measurement for payment for assistance in sampling andtesting will be in hours. .

D. Separate measurement for payment will not be made for thefollowing:

1. Dust control.

2. Site clearing and stripping.

3. Borrow excavation.4. Borrow restoration.

5. Subgrade preparation and base construction.

6. Provision of assistance in sampling and testing.

7. Stockpiling of materials.

8. Removal of test fill.

9. Restoration and seeding of test fill site.

4.2 PAYMENT

A. Payment for the construction of the test fill will be bythe lump-sum price. The price quoted shall include fullcompensation for furnishing all materials excludingbentonite, tools, equipment, accessories, incidentals,labor, and for performing all work as specified in thisSection excluding mixing of bentonite but including, butnot limited to, clearing, stripping, borrow excavation andrestoration, subgrade preparation, base construction,temporary stockpiling of materials, placement of allmaterials, removal of the test fill and restoration andseeding of test fill areas, and the like. -

B. Payment for furnishing and mixing bentonite will be by theunit price per ton.

C. Payment for assistance in sampling and testing will be bythe unit price per hour.

D. Separate payment will not be made for items listed underArticle 4.1.D above. Full compensation for such work willbe considered to be included in the applicable relateditems of work.

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I END OF SECTION 02220I

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i Document No. 4005-DUR-S-01-0279t-00i Issued for Construction-Revision 0

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Test Fill 6625SDUR 02220 - 8 092988

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