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S G S E N G I N E E R S

INITIAL DESIGN CAPACITY REPORT ANDTIER 1 NMOC EMISSION RATE REPORT

SUNRISE MOUNTAIN LANDFILLCLARK COUNTY, NEVADA

•SCS ENGINEERS-

INITIAL DESIGN CAPACITY REPORT ANDTIER 1 NMOC EMISSION RATE REPORT

SUNRISE MOUNTAIN LANDFILLCLARK COUNTY, NEVADA

Presented to:

REPUBLIC DUMPCO770 East Sahara Avenue

Las Vegas, Nevada 89104

Presented by:

SCS ENGINEERS2702 North 44th Street

Suite 105BPhoenix, Arizona 95008

File No. 1099007.01 Task 2April 5, 2000

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Environmental Consultants 2702 North 44th StreetSuite 105BPhoenix, AZ 85008-1583

602.840.2596FAX 602.224.0572

SCS ENGINEERS

April 5, 2000

Ms. Patricia BowlinEnvironmental EngineerAIR-4USEPA Region IX75 Hawthorne StreetSan Francisco, CA 94105

Re: Initial Design Capacity Report and Tier INMOC Emission Rate ReportSunrise Mountain LandfillClark County, Nevada

Dear Ms. Bowlin:

SCS Engineers, on behalf of Republic DUMPCo, hereby provides the Initial Design CapacityReport and Tier I Emission Rate Report required by the Federal Municipal Solid WasteLandfills Emission Guidelines effective January 7, 2000 (in accordance with the Federal Planschedule).

The disposal rates used to generate the emission rate report were based on the current estimatesof waste in-place from historical records. If further study indicates more quantified estimatesof the waste in-place then the Tier I survey will be adjusted and resubmitted.

If you have any questions or comments regarding this submittal, please contact Mr. AlanGaddy of Republic DUMPCo at (702) 734-5400.

Sincerely,

rad S. AndererProject Manager

Stephen B. Smith, P.E.Project DirectorSCS Engineers

Attachments

cc. Mr. Mike NaylorClark County Health DistrictAir Pollution Control District

BA/SBS:baF:\DATA\PROJECTS\9900701 .sunriseYTASK 02-LandfMI Gas AssessVDesign Capactiy Tier I Sunrise.doc

OFFICES NATIONWIDE

Mr. Tom GardnerRegulatory ManagerEnvironmental Technologies ofNevada

ATTACHMENT A

ATTACHMENT AINITIAL DESIGN CAPACITY REPORT ANDTIER 1 NMOC EMISSION RATE REPORT

SUNRISE MOUNTAIN LANDFILLCLARK COUNTY, NEVADA

This form fulfills the requirements of the Federal Municipal Solid Waste Landfills EmissionGuidelines effective January 7, 2000 (in accordance with the Federal Plan schedule) for anInitial Design Capacity and Tier 1 NMOC Emission Rate Report. SCS Engineers on behalf ofRepublic DUMPCo prepared this document for the Sunrise Mountain Landfill.

This report demonstrates that the design capacity of the Sunrise Mountain Landfill exceeds 2.5million Megagrams (Mg) and 2.5 million m3. The Tier 1 1999 NMOC emission rate exceeds50 Mg, as demonstrated in the Tier I study included as Attachment C. Unless a Tier 2 surveydemonstrates the 50 Mg threshold has not been exceeded, a control system design plan will besubmitted in accordance with 40CFR60 Subpart WWW.

I. IDENTIFYING INFORMATION

1. Name of person submitting form: Alan J. Gaddy/Republic DUMPCo

2. Telephone number: (702) 734-5400

3. Person's position: Vice President

4. Name of landfill: Sunrise Mountain Landfill

5. Address of landfill: 7900 East Vegas Valley Drive/Las Vegas/ Nevada

6. Name of landfill owner: Bureau of Land Management

7. Address of landfill owner: 4765 Vegas Drive/Las Vegas/ Nevada/89108

8. Name of landfill operator: Republic DUMPCo

9. Address of landfill operator: 770 E. Sahara Ave./Las Vegas/Nevada/89104

10. Is the landfill new or existing?

New (began construction, reconstruction, or modification on or after May 30,1991)

X Existing (began construction, reconstruction, or modification before May 30,1991; hasaccepted waste after November 8,1987; or has additional capacity available for futurewaste deposition)

F \DATA\PROJECTS\990070I sunnseYTASK 02-Landfill Gas AssessXDesign Capacity Tier i Sunnse doc

ATTACHMENT B

SITE PLAN

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SCALE IN FEETT-2000'

SCS ENGINEERSSTEARNS, CONMD AND SCHMIDTCONSULTING ENGINEERS2702 N 441H ST SUITE 105B PHOtMX. AZ KO06PH. (M2) «0-iM» FAX (K>2> 2!*-0572

REPUBLIC DUMPGO, INC

770 EAST SAHUM AVENUELAS VEGAS, NV 88104PH. (702) M4-4S94

SITE VICINITY MAP

SUNRISE MOUNTAIN LANDFILLCLARK COUNTY, NEVADA 7\

OVERSIZE ITEM(S)

Due to the size of this item, it has been scanned separately.

See Document #______________ for scanned image(s).2032105

ATTACHMENT C

DESIGN CAPACITY CALCULATION

TABLE 1. PROJECTED LFG AND NMOC GENERATION RATESSUNRISE MOUNTAIN LANDFILL

Year19581959196019611962196319641965196619671968196919701971197219731974197519761977197819791980198119821983198419851986198719881989199019911992199319941995199619971998199920002001200220032004200520062007200820092010

DisposalRate

(tonsfyr)90,00097,000105,000113,000122,000132,000143,000154,000166,000179,000193,000208,000225,000243,000262,000283,000306,000330,000356,000384,000415,000448,000484,000523,000565,000610,000659,000712,000769,000831,000897,000969,000

1,066,0001,173,0001,290,000948,000

00000000000000000

RefuseIn-Place(tons)

090,000187,000292,000405,000527,000659,000802,000956,000

1,122,0001,301,0001,494,0001,702,0001,927,0002,170,0002,432,0002,715,0003,021,0003,351,0003,707,0004,091,0004,506,0004,954,0005,438,0005,961,0006,526,0007,136,0007,795,0008,507,0009,276,00010,107,00011,004,00011,973,00013,039,00014,212,00015,502,00016,450,00016,450,00016,450,00016,450,00016,450,00016,450,00016,450,00016,450,00016,450,00016,450,00016.450,00016,450,00016,450,00016,450,00016,450,00016,450,00016,450,000

DisposalRate(Mg/yr)

81,64787,99795,254102.512110,677119,748129,727139,706150,593162,386175,087188,694204,117220,446237,682256,733277,599299,371322,958348,359376,482406.419439,077474.458512,559553,383597,835645,916697,625753,871813,745879,062967,059

1,064,1281,170,268860,01 1

00000000000000000

RefuseIn-Place(Mg)

081,647169.644264,898367,410478,086597,835727,562867,269

1,017,8611,180,2471,355,3341,544,0281,748,1451,968,5912,206,2732,463,0072,740,6053.039,9763.362,9343,711,2934,087,7744,494,1934,933,2715,407,7285,920,2886,473,6707,071,5057,717,4218,415,0469,168,9169,982,66110.861,72311,828,78212,892,91014,063,17814,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,18914,923,189

MethaneGenerationBales(mV)O.OOOE+002.776E+055.713E+058.838E+051.215E+061.567E+061.943E+062.346E+062.774E+063.231 E+063.720E+064.241 E+064.799E+065.398E+066.040E+066.729E+067.469E+068.265E+069.119E+061.004E+071.102E+071.208E+071.323E+071.446E+071.578E+071.721E+071.875E+072.042E+072.221E+072.414E+072.623E+072.847E+073.090E+073.357E+073.653E+073.978E+074.192E+074.109E+074.028E+073.948E+073.870E+073.793E+073.718E+073.644E+073.572E+073.501 E+073.432E+073.364E+073.297E+073.232E+073.168E+073.105E+073.044E+07

LFGGeneration

Rates(cfm)

03777119163211261315373434500570645725812904

1,0041,1111,2251,3491,4811,6241,7771,9432,1212,3132,5202,7442,9843,2443,5243,8264,1524,5124,9085,3465,6335,5215,4125,3055,2005,0974,9964,8974,8004,7054,6124,5214,4314,3434,2574,1734,090

NMGeneBa

(tons/yr)0918283850617488102118134152171191213236261288317348382418457499544593645702763829900977,061,155,258,325,299,273,248,223,1991,1751,1521,1291,1071,0851,0631,0421,0221,002982962

OCrationtea

(Mg/yr)081625354556678093107122138155173193214237262288316347379415453494538585637692752817886963

1,0481,1411,2021,1781,1551,1321,1101.0881.0661.0451,0241.004984965946927909891873

NOTES:(1) Disposal rates are based on the following: a) 16.45 million tons in place; b) approximately 3400 tpd disposal rates in 1991-93; and

c) assumed annual growth rates of 8% from 1958-89 and 10% from 1991-93.(2) Model input parameters are based on NSPS requirements and are as follows:

a) NMOC concentration in LFG: 4000 ppmvb) Methane concentration of LFG: 50%c) Selected decay rate constant (k): 0.02d) Selected ultimate methane generation rate (Lo): 5,446 ft3/ton

Metric Equivalent Lo: 170 cu m/Mg

f:\dala\projects\10199007.01 Task 2\Sunrise NSPS LFG model3/23AW