AirResourcesBoardMaryD.Nichols,Chairman1001lStreet•P.0.Box2815MatthewRodnquezSacramento,California95812www.arb.ca.govEdmundG.BrownJr.SecretaiyforGovernorEnvironmentalProtectionMay9,2014Mr.AndrewSteckel,ChiefRulemakingOffice(Air-4)U.S.EnvironmentalProtectionAgencyRegion975HawthorneStreetSanFrancisco,California94105DearMr.Steckel:EnclosedisareviseddocumententitledListofConservationManagementPracticesforAgriculturalOperations(CMP)totheGreatBasinUnifiedAirPollutionControlDistrict’s(District)Rule502,ConservationManagementPractices.Rule502wasadoptedbytheDistrictonJuly7,2005,andsubmittedbytheAirResourcesBoard(ARB)forinclusionintheStateofCaliforniaImplementationPlanforAchievingandMaintainingtheNationalAmbientAirQualityStandard(SIP)onOctober20,2005.TheDistrictrevisedtheCMPinresponsetoU.S.EnvironmentalProtectionAgency’s(U.S.EPA)concernregardingclarificationissuesontheconservationmanagementpracticecategoriesintheCMP.AcopyoftheU.S.EPAletterdatedJune8,2011,totheDistrictisenclosedalongwiththeDistrict’sBoardOrderadoptingtheCMPrevisions.WeunderstandthattheU.S.EPAhasexaminedtherevisedCMPandconcurredwiththeCMP’srevisedchanges.ARBisrequestingthatU.S.EPAreplacetheCMPintheRule502SIPsubmittedonOctober20,2005,withtherevisedCMPenclosedwiththisletter.Ifyouhaveanyquestionsaboutthisrequest,pleasecontactMr.MichaelJ.Guzzetta,Manager,RuleEvaluationSection,at(916)322-6025orbyemailatmquzzettcarb.ca.qov.Sincerely,StevenS.Cliff,Ph.AssistantChiefStationarySourceDivision-EnclosuresTheenergychallengefacingCaliforniaisreal.EveiyCalifornianneedstotakeimmediateactiontoreduceenergyconsumption.Foralistofsimplewaysyoucanreducedemandandcutyourenergycosts,seeourwebsite:http://www.arb.ca.ov.CaliforniaEnvironmentalProtectionAgencyPrintedonRecycledPaperMr.AndrewSteckelMay9,2014Page2cc:Mr.TheodoreD.Schade(w/oEnclosures)AirPollutionControlOfficerGreatBasinUnifiedAirPollutionControlDistrict157ShortStreet,Suite6Bishop,California93514-3537Mr.MichaelJ.Guzzetta,Manager(wloEnclosures)RuleEvaluationSectionStationarySourceDivisionGreatBasinUnifiedAirPollutionControlDistrictLISTOFCONSERVATIONMANAGEMENTPRACTICESFORAGRICULTURALOPERATIONSIncludingBestAvailableControlMeasures(BACM)andBestAvailableRetrofitControlTechnology(BARCT)forAgriculturalPracticeshtti:1‘www.gbuapcd.org/farm/index.htmDecember2011

# GREAT BASIN UNIFIED

AIR POLLUTION CONTROL DISTRICT BACMJBARCT

LIST

OF CoNSERvATIoN MANAGEMENT PRACTICES

FOR AGRICULTURAL OPERATIONS The Conservation Management Practices (CMP) categories

for both Alfalfa (CMP

1) and Row/Filed

Crops (CMP

2) are: A. Land Preparation

/ Cultivation B. Harvesting C. Other D. Unpaved Roads greater
than

or equal

to 75 vehicle
trips

/ day (complete

this category

if your farm roads

has

75 or greater vehicle

trips per day) F. Unpaved Roads

less than

75 vehicle

trips

/ day (complete

this category

if your farm roads has less than

75 vehicle
trips per day) F. Unpaved Vehicle

/ Equipment

Areas (vehicle

I equipment parking

lots, staging areas, etc.) greater
than

or equal

to 50 vehicle
trips

/ year (complete

this category

if your farms unpaved vehicle

/ equipment

area has

50 or greater vehicle
trips per year) G. Unpaved Vehicle

/ Equipment

Areas

less Than

50 vehicle
trips /year (complete

this category iiyour farm’s unpaved vehicle

/ equipment

area has less than

50 vehicle
trips per year) If

a dairy, confined animal feeding operation (CAFO)

or other crop

or agricultural practice-- 

# comes
into the three counties

that comprisethe Great-Basin UnifiedAirPollutionControl District,

a CMP

list will

be developed

for that type

of operation.
Please contact

the District at (760) 872-8211

if you have any questions.

Page

2 of
17rCMP1.ALFALFAFARMINGCategoryCMP1-A;LAN])PREPARATIONICULTIVATIONCessationofActivitiesDuringHighNodisking,tillingorotherlandpreparationWinds:activitiesshalltakeplacewhenactivewinderosionisobservedonafieldandvisibleparticulatematterleavesthepropertyfromwhichitoriginates.Chemigation/Fertigation:Applicationofchemicalsthroughanirrigationsystemreducestheneedtotravelin-fieldforapplicationpurposes.CombinedOperations:Combineequipmenttoperformseveraloperationsduringonepass,therebyreducingthenumberof.passesnecessarytocultivatetheland.ConservationIrrigation:Conservingwaterthroughdrip,sprinkler,•undergroundlines,conserveswaterandreducesweedpopulationandneedfortillage.EquipmentChanges/TechnologicalUselargerequipment,modifylandplaningandlandImprovements:leveling,matchingtheequipmenttorowspacingtoreducethenumberofpasses.MultipleCMPsinanothercategory:NightFarming:Operateatnightwhenmoisturelevelsarehigherandwindstendtobelighter,therebyreducingdustemissions.Non-Tillage/ChemicalTillage:Useflailmower,lowvolumesprayers,orheatdeliverysystems(asharvestpre-conditioner).Reducesoreliminatesnumberofsoiltillagepasses.SoilMoistureManagement:Ensureadequatesoilmoisturelevelsatthetimeoftillageorsoilmaintenancetoreducedustemissions.Other(specialapprovalrequired):ContactDistrictat(760)872-8211forapproval.Page3ofI7

# (II’

r CMP

1 ALFALFA FARMING Category

CMP
1-B; HARVEST Combined Operations:

Combine equipment

to perform several operations during

one pass, thereby reducing

the number

of passes necessary

to cultivate

the land. Equipment Changes/Technological

Use larger equipment, modify

land planing

and land Improvements:

leveling, matching

the equipment

to cow spacing

to reduce

the number

of passes. Green Chop:

Harvest

a forage
crop without allowing

it to dry

in the field; reduces multiple equipment
passes. Large Bales:

Use balers

to harvest crop, reducing PM1O emissions

from crops traditionally harvested

by chopping,

truck passes,

and residue burning. Multiple CMPs

in another category: Night Harvesting:

Implement cultural practices

at night

or when

the humidity

is high. Shuftle System:

Haul multiple

or larger trailers/bins

per trip thereby reducing

the number

of trips. Other (special approval required):

Contact District
(760) 872-821

1 for approval Page

4 of
17rCMP1ALFALFAFARMINGCATEGORYCMP1-C;OTHERConservationtillage(e.g.:notillage,minimumtillage)Typesoftillagethatreducelossofsoilandwaterincomparisontoconventionaltillage.Reducesthenumberofpasses,soildisturbance.Itimprovessoilbecauseitretainsplantresidueandincreasesorganicmatter.Convertingtonoorlowtilloperations,implementreducedtillactivities,addingsoil!wateramendmentstoimproveresourceandreducetillageneeds.CoverCrop:Useseedingornaturalvegetationlregrowthofplantstocoversoilsurfaceandreducewinderosionofsoil.FallowingLand:Temporaryorpermanentremovalfromproductioneliminatesentireoperationlpassesorreducessoildisturbingactivities.MultipleCMPsinanothercategory:OrganicPractices:Usebiologicalcontrolmethodsornon-chemicalcontrolmethods.Reduceschemicaluseandnumberofapplicationpasses.SurfaceRoughening:Inwind-proneareas,conductsurfacerougheningbybedding,roughdisking,ortillagethatleavesthesurfacecoveredwithstableclods.TimeofDisturbance/Planting:TimeplantingtocoincidewiththetimeofyearwhenPMconcentrationsareless.Other(specialapprovalrequired):ContactDistrict(760)872-8211forapproval(‘II’Page5ofl7

# (‘SIP CMP

1 ALFALFA FARMING CATEGORY

CMP
1-D; UNPAVED ROADS (GREATER

THAN

OR EQUAL

TO 75 VEHICLE
TRIPS

/ Dust Suppressant:

Apply

an approved

dust suppressant

at

a sufficient quantity

and frequency

to prevent windblown

dust. Paving:

Pave unpaved roads. (Gives maximum PM-1O emissions reductions

as long

as paved surface

is kept clean.) Road
Oil:

Apply road

oil
to the unpaved

road surface
area. Washed Gravel:

Apply washed gravel

to the unpaved

road surface area. Water:

Apply water

at

a sufficient quantity

and frequency to maintain
moist surface under windy conditions. Other (speciaL approval required):

Contact District (760) 872-8211

for approval Page

6 of

17CMP1ALFALFAFARMINGCATEGORYCMP1-E;UNPAVEDROADS(LESSTHAN75VEHICLETRIPS/DAY)AccessRestriction:Restrictpublicaccesstounpavedroadsusingsignageorphysicalaccessrestrictions(e.g.,accessbarrier)and/orlimittotaltripstolessthan10perday.Chips/Mulches:Applywoodchipsormulchtotheunpavedroadsurfacearea.DustSuppressant:Applyanapproveddustsuppressantatasufficientquantityandfrequencytopreventwindblowndust.Lessthan10vehicletripsonanyday:OrganicMaterials:Applyorganicmaterialstotheunpavedroadsurfacearea.Paving:Paveunpavedroads.(GivesmaximumPM-10emissionsreductionsaslongaspavedsurfaceis-keptclean.)Polymers:Applypolymerstotheunpavedroadsurfacearea.RoadOil:Applyroadoiltotheunpavedroadsurfacearea.SpeedLimits:Controlspeedlimitsto15mphonunpavedroads.throughworkerbehaviormodification,signage,oranyothernecessarymeans.Track-OutControl:Minimizedirtmaterialtrackedoutontopublicroadwaysbypavingorchemicallystabilizing,or:applyinggraveltotheunpavedroadsurfaceforadistanceofatleast100feetfromthepublicroadway.Checkorcleantheundersideofallhaultrucksbeforeleavingtheparkingorstagingarea.Water:Applywatertotheunpavedroadsurfacearea.WashedGravel:Applywashedgraveltotheunpavedroadsurfacearea.WindBarrier:Planttreesorestablishotherbarriersonthetypicallyupwindsideofthetrafficareatominimizewindblowndustfromtheunpavedsurface.Other(specialapprovalrequired):ContactDistrict(760)872-8211forapproval(‘N1IPage7ofl7

# 1 ALFALFA FARMING CATEGORY

CMP
1-F; VEHICLE

/ EQUIPMENT

AREAS (IF AVERAGE DAILY VEHICLE
TRIPS

I YR ARE GREATER
THAN

OR EQUAL

TO
50 ON UNPAVED EQUIPMENT
YARDS.

OR IF AVERAGE DAILY TRIPS

BY

3 (OR MORE) AXLED VEHICLES

I YR ARE GREATER
THAN

OR EQUAL

TO 25) Dust Suppressant:

Apply

an approved

dust suppressant

at

a sufficient quantity

and frequency

to prevent windblown

dust. Paving:

Pave unpaved vehicle

/ equipment

areas. (Gives maximum PM-10 emissions reductions

as long

as paved surface

is kept clean.) Road
Oil:

Apply road

oil
to the unpaved vehicle/equipment area surface. Vegetative material:

Apply vegetative material

to the unpaved. 

# vehicle/equipment

area surface. Washed Gravel:

Apply washed gravel

to the unpaved vehicle/equipment

area surface. Water:

Apply water

to the unpaved vehicle/equipment

area surface. Other (special approval required):

Contact District (760) 872-8211

for approval Page

8 of

17rCMP1ALFALFAFARMINGCATEGORYCMP1-G;VEHICLEIEQUIPMENTAREAS(IFAVERAGEDAILYVEHICLETRIPS/YRARELESSTHAN50ONUNPAVEDEQUIPMENTYARDS.orIFAVERAGEDAILYTRIPSBY3(ORMORE)AXLEDVEHICLES/YRARELESSTHAN25)Chips/Mulches:Applywoodchipsormulchestotheunpavedvehicle/equipmentareasurface.Lessthan10vehicletripsonanyday:Organicmaterials:Applyorganicmaterialtotheunpaved.vehicle/equipmentareasurface.Polymers:Applypolymerstotheunpavedroadsurfacearea.RestrictedAccess:Restrictpublicaccesstounpavedvehicle/equipmentareasurfaceusingsignageorphysicalaccessrestrictions(e.g.,accessbarrier)and/orlimittotaltripstolessthan10perday.RoadOil:Applyroadoiltotheunpavedvehicle/equipmentareasurface.SpeedLimits:Controlspeedlimitsto15mphonunpavedvehicle/equipmentareathroughworkerbehaviormodification,signage,oranyothernecessarymeans.Paving:Paveunpavedvehicle/equipmentareas.(GivesmaximumPM-bemissionsreductionsaslongaspavedsurfaceiskeptclean.)Water:Applywatertotheunpavedvehicle/equipmentareasurface.WashedGravel:Applywashedgraveltotheunpavedvehicle/equipmentareasurface.WindBarrier:Planttreesorestablishotherbarriersonthetypicallyupwindsideofthetrafficareatominimize.windblowndustfromtheunpavedsurface.Other(specialapprovalrequired):ContactDistrict(760)872-8211forapproval(‘MI’Page9of17

# CMP

2 FIELD AND ROW CROPS Category

CMP 2-A; LAND PREPARATION

/ CULTIVATION Bed/Row

Size

or Spacing:

Spacing adjustments

reduce

the number

of passes and soil disturbances

by increasing

plant density/canopy

through reduction

of row width. Cessation

of Activities:

No disking, tilling

or other land preparation activities

shall take place when active wind erosion is observed

on

a field and visible particulate
matter.



# leaves

the property

from which

it originates. Chemigation/Fertigation:

Application

of chemicals through

an irrigation system reduces

the need

to travel in-field

for application purposes. Combined Operations:

Combine equipment

to perform several operations during

one pass, thereby reducing

the number

of passes necessary

to cultivate

the land. Conservation Irrigation:

Conserving

water through

drip, sprinkler,,



# underground

lines, conserves

water
and reduces weed population

and need

for tillage. Conservation

tillage (e.g.:

no tillage,

Types

of tillage

that reduce

loss

of soil and water

in minimum tillage)

comparison

to conventional

tillage. Reduces

the number

of passes,

soil disturbance.

It improves

soil because

it retains plant residue

and increases organic matter. Converting

to no or low
till operations, implement reduced

till activities, adding soil! water amendments

to improve resource

and reduce tillage needs. Cross Wind Stripcropping:

Establish

crops

in strips across

the prevailing

wind direction

and arranged

so that strips susceptible

to wind erosion

are alternated

with strips resistant

to wind erosion. Equipment Changes/Technological

Use larger equipment,
modify

land planing

and land Improvements:

leveling, matching

the equipment

to row spacing

to reduce

the number

of passes. Multiple CMPs

in another category: Mulching:

Applying

or leaving plant residue

or other material on the soil surface. Reduces
wind entrainment

of dust,
and reduces
weed competition. Night Farming:

Operate

at night when moisture
levels

are higher and winds tend

to be lighter, thereby reducing

dust emissions. List

of CMPs options continued

on next page

Page

10 of

17CMP2FIELDANDROWCROPSCategoryCMP2-AtLANDPREPARATIONICULTIVATION-CONTINUEDNon-tillage/ChemicalTillage:Useflailmower,lowvolumesprayers,orheat.deliverysystems(asharvestpre-conditioner).Reducesoreliminatesnumberofsoiltillagepasses.Transplanting:Plantingplantsalreadyinthegrowthstatereducesnumberofpassesandsoildisturbancescomparedtoseedingoperations.Other(specialapprovalrequired):ContactDistrict(760)872-8211forapprovalPage11of17‘2FIELDANDROWCROPS 

# Category

CMP 2-Bc HARVEST Combined Operations:

Combine equipment

to perform several operations during

one pass, thereby reducing

the number

of passes necessary

to cultivate

the land. Equipment Changes/Technological

Use larger equipment,
modify

land planing

and land Improvements:

leveling, matching

the equipment

to row spacing

to reduce

the number

of passes. Hand Harvesting:

Harvest

crop

by hand thereby reducing

soil disturbances

by equipment.MultipleCMPsin 

# another category: Night Harvesting:

Implement cultural practices

at night

or when

the humidity

is high. Pre-Harvest

Soil Preparation:

Apply

a light amount

of water

or other stabilizing material

to soil prior

to harvest. Shed Packing:

Pack commodities

in

a covered

or closed area. Shuttle System:

Haul multiple

or larger trailers/bins

per trip thereby reducing

the number

of trips. Other (special approval required):

Contact District
(760) 872-82

1

1 for approval Page 12of17CMP2FIELDANDROWCROPSCategoryCMP2-CtOTHERCoverCrops:Useseedingornaturalvegetation/regrowthofplantstocoversoilsurfaceandreducewinderosionofsoil.FallowingLand:Temporaryorpermanentremovalfromproduction-eliminatesentireoperation/passesorreducessoil.disturbingactivities.MultipleCMPsinanothercategory:Non-tillage/ChemicalTillage:Useflailmower,lowvolumesprayers,orheatdeliverysystems(asharvestpre-conditioner).Reducesoreliminatesnumberofsoiltillagepasses.OrganicPractices:Usebiologicalcontrolmethodsornon-chemicalcontrolmethods.Reduceschemicaluseandnumberofapplicationpasses.SoilMoistureManagement:Ensureadequatesoilmoisturelevelsatthetimeoftillageorsoilmaintenancetoreducedustemissions.SurfaceRoughening:Inwind-proneareas,conductsurfacerougheningbybedding,roughdisking,ortillagethatleavesthesurfacecoveredwithstableclods.TimeofDisturbance/Planting:TimeplantingtocoincidewiththetimeofyearwhenPMconcentrationsareless.WindBarriers:Plantormaintainperennialorannualplantsinterspersedthroughoutacropfieldasclosetoperpendicularaspracticaltothedirectionofprevailingwinds.Other(specialapprovalrequired):ContactDistrict(760)872-8211forapprovalPage13of17

# CMP

2 FIELD AND ROW CROPS CATEGORY

CMP 2-D; UNPAVED ROADS (GREATER

THAN

OR EQUAL

TO 75 VEHICLE
TRIPS

/ Dust Suppressant:

Apply

an approved

dust suppressant

at

a sufficient quantity

and frequency

to prevent windblown

dust. Paving:

Pave unpaved roads. (Gives maximum

PM-b emissions reductions

as long

as paved surface

is •

kept clean.) Road
Oil:

Apply road

oil
to the unpaved

road surface
area. Washed Gravel:

Apply washed gravel

to the unpaved

road surface area. Water:

Apply water

at

a sufficient quantity

and frequency to maintain
moist surface under windy conditions. Other (special approval required):

Contact District
(760) 872-821

1 for approval Page

14 of

172FIELDANDROWCROPSCATEGORYCM?2-E;UNPAVEDROADS(LESSTHAN75VEHICLETRIPS/DAY)AccessRestriction:Restrictpublicaccesstounpavedroadsusingsignageorphysicalaccessrestrictions(e.g.,access.barrier)and/orlimittotaltripstolessthan10perday.Chips/Mulches:Applywoodchipsormulchtotheunpavedroadsurfacearea.DustSuppressant:Applyanapproveddustsuppressantatasufficientquantityandfrequencytopreventwindblowndust.Lessthan10vehicletripsonanyday:OrganicMaterials:Applyorganicmaterialstotheunpavedroadsurfacearea.Paving:Paveunpavedroads.(GivesmaximumPM-10emissionsreductionsaslongaspavedsurfaceiskeptclean.)Polymers:Applypolymerstotheunpavedroadsurfacearea.RoadOil:Applyroadoiltotheunpavedroadsurfacearea.SpeedLimits:Controlspeedlimitsto15mphonunpavedroadsthroughworkerbehaviormodification,signage,oranyothernecessarymeans.Track-OutControl:Minimizedirtmaterialtrackedoutontopublicroadwaysbypavingorchemicallystabilizing,orapplyinggraveltotheunpavedroadsurfaceforadistanceofatleast100feetfromthepublicroadway.Checkorcleantheundersideofallhaul.trucksbeforeleavingtheparkingorstagingarea.Water:Applywatertotheunpavedroadsurfacearea.WashedGravel:Applywashedgraveltotheunpavedroadsurface,area.WindBarrier:Planttreesorestablishotherbarriersonthetypicallyupwindsideofthetrafficareatominimizewindblowndustfromtheunpavedsurface.Other(specialapprovalrequired):ContactDistrict(760)872-8211forapprovalPage15of17

# r

2 FIELD AND ROW CROPS CATEGORY

CMP 2-Ft VEHICLE

/ EQUIPMENT

AREAS (iF AVERAGE DAILY VEHICLE
TRIPS

/ YR ARE GREATER
THAN

OR EQUAL

TO SOON UIPAVED EQUIPMENT
YARDS,

OR IF AVERAGE DAILY TRIPS

BY

3 (OR MORE) AXLED VEHICLES

/ YR ARE GREATER
THAN

OR EQUAL

TO 25) Dust Suppressant:

Apply

an approved

dust suppressant

at

a sufficient quantity

and frequency

to prevent windblown

dust. Paving:

Pave unpaved vehicle

/ equipment

areas. (Gives maximum PM-lO emissions reductions

as long

as paved surface

is kept clean.) Road
Oil:

Apply road

oil
to the unpaved vehicle/equipment area surface. Vegetative material:

Apply vegetative material

to the unpaved vehicle/equipment

area surface. Washed Gravel:

Apply washed gravel

to the unpaved vehicle/equipment

area surface. Water:

Apply water

to the unpaved vehicle/equipment

area surface. Other (special approval required):

Contact District
(760) 872-82

1

1 for approval Page

16 of

172HELDANDROWCROPSCATEGORYCMP2-G;VEHICLE/EOUIPMENTAREAS(ifAVERAGEDAILYVEHICLETRIPS/YRARELESSTHAN50ONUNPAVEDEQUIPMENTYARDS,orIFAVERAGEDAILYTRIPSBY3(ORMORE’)AXLEDVEHICLES/YRARELESSTHAN25’)Chips/Mulches:Applywoodchipsormulchestotheunpavedvehicle/equipmentareasurface.Lessthan10vehicletripsonanyday:Organicmaterials:Applyorganicmaterialtotheunpavedvehicle/equipmentareasurface.Polymers:Applypolymerstotheunpavedroadsurfacearea.RestrictedAccess:Restrictpublicaccesstounpavedvehicle/equipmentareasurfaceusingsignageorphysicalaccessrestrictions(e.g.,accessbarrier)and/orlimittotaltripstolessthan10perday.RoadOil:Applyroadoiltotheunpavedvehicle/equipmentareasurface.SpeedLimits:Controlspeedlimitsto15mphonunpavedvehicle/equipmentareathroughworkerbehavior.modification,signage,oranyothernecessarymeans.Paving:Paveunpavedvehicle/equipmentareas.(GivesmaximumPM-bemissionsreductionsaslongaspavedsurfaceiskeptclean.)Water:Applywatertotheunpavedvehicle/equipmentareasurface.WashedGravel:Applywashedgraveltotheunpavedvehicle/equipmentareasurface.WindBarrier:Planttreesorestablishotherbarriersonthetypicallyupwindsideofthetrafficareatominimizewindblowndustfromtheunpavedsurface.Other(specialapprovalrequired):ContactDistrict(760)872-8211forapprovalPage17of17

# Theodore

D. Schade Air PoHution Control Officer 

# GREAT BASIN UNIFIED.

AIR POLLUTION CONTROL DISTRICT 157 Short Street, Bishop, California 93514-3537 760-872-8211

Fax: 760-872-6109 BlO #111205-07 December

5, 2011 I HEREBY CERTIFY

that ata regular meeting

of the Great Basin Unified

Air Pollution Control District Governing

Board held

in Mono County Board

of Supervisors Chambers, Bridgeport, California

on December

5, 2011

an order was duly made

and entered

as follows: AGENDA

ITEM
#7: CONSENT AGENDA ITEMS

A THROUGH

B AND

E A motion

was made

by Eastman

and seconded

by Cervantes approving consent agenda items

a through

b and

e as follows: a) Approval

of revised agricultural activities Conservation Management

Practices Guidance

as requested

by the United States Environmental Protection agency. b) Adoption

of the 2012 District
Rule adoption/revision

schedule

as required

by California Health

& Safety Code §40923.

(US EPA
105 Grant Program) e) Approve purchase orders
with NRG Systems

in the amount

of $5,471.12

for anemometers; California

P&C,

Inc.

in the amount

of $3,971.73

for HD remote cameras;

and Trango Broadband Wireless

in the amount

of $2,675.23

for network communication
antennas. Ayes: Board Members

— 

# Arcularius, Hansen, Johnston, Eastman, Veatch, Sweeney, Cervantes Noes:

0 Abstain:

0 Absent:

0 Motion carried

7/0 and

so ordered. ATTEST: Tori DeHaven,

Clerk

of the BoardUNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION

IX 75 Hawthorne

Street San Francisco,

CA 94105 June 8,2011 Mr. Theodore

D. Schade Air Pollution Control Officer Great Basin Unified

Air Pollution Control District 157 Short Street Bishop, California

935 14-3537 Dear Ted, As we recently discussed,

EPA
has completed

a preliminary
review

of Rule 502

as adopted

by the Great Basin Unified

Air Pollution Control District (GBUAPCD)

on July

7, 2005 and submitted

to EPA

by the California

Air Resources
Board (CARB)

on October

20, 2005.

We understand

that GBUAPCD adopted

this rule primarily

to comply
with California
Senate

Bill 700, and that the rule may not
be needed

to comply
with Federal Clean
Air Act (CAA) State Implementation

Plan (SIP) requirements

at this time. Nonetheless,

EPA

is required under CAA Section

110

to approve

or disapprove

all such SIP submittals
within

one year

of determining

that the submittals

are complete. EPA generally reviews

SIP rule submittals

such

as this one against three criteria: enforceability, anti-backsliding,

and stringency.

While

this rule would improve

the SIP and fulfills

the antibacksliding

and stringency criteria,

we do not believe

it is fully enforceable.

As

a result,

if we propose action

on this rule pursuant

to CAA Section

110, we would propose

a simultaneous limited approval

and limited disapproval.

If we finalize
such action,

it would have
the effect

of incorporating

the rule requirements

into the federally-enforceable

SIP, while notifying

the public of our enforceability concerns.

There would

be no CAA sanction

or FIP implications

of this action because

we do not believe

it is

a required submittal

at this time. Our concern partly regards
Rule 502 Section

6.2, which directs owner/operators

to select
one CMP from
the CM?

list for each

of the applicable

CMP categories. However,

the rule does not contain

a clear, consistent
listing

or description

of what constitutes

an “applicable” category.

In addition,

the supporting documents

are not consistent

in terms

of applicable

CMP categories

and CMPs.

See,
for example,

the Board Report dated July

7, 2005 Attachment

C; Program Description

and Plan Application

Forms dated December

19, 2008;
and the optional
CMP application

forms (2005, 2008).
This

is problematic because

the type and number

of applicable CMP categories determines

the number

of CMPs required

by the rule.

To address

this issue,

the applicable

CMP categories should

be clarified

and made consistent among

the rule,
the CMP
list, the plan description,

the application
forms,

and any other supporting information

for the rule.

# Please

let us know

by July

15, 2011

if you would

like

us to delay action

on this rule until GBUAPCD

can address

this deficiency.

If so, please describe

your anticipated tinieline.

If you have any questions

in this regard, please contact Nancy Levin

at 415-972-3848. Sincerely, 

# 47tcç An
ew Steckel, Manager Air Division,
Rules Office cc. Mike Guzzetta, CARB