1 R e s p o n s e t o E P A R e q u e s t f o r Additional I n f o r m a t i o n R e g a r d i n g C e r t a i n A g g r e g a t e O p e r a t i o n s

• Chandler Aggregates (ID 108046)

Chandler Aggregates operated an aggregate processing system consisting of numerous hoppers, feeders, crushers, screens, and conveyors to produce various sizes of aggregate products in Corona, California. The PM10 credit calculations for this facility were based on

the emission s reported in their AER 2003

- 2004 and AER 2004

- 2005

. This facility reported

PM emissions for the ir aggregate processing system in their AER s using a PM emission factor of 11.8727 lbs/1,000 tons of t hroughput.

To determine if a surplus adjustment is necessary for th is aggregate process ing system

, the AQMD must determine if the PM emission factor of 11.8727 lbs/1,000 tons of throughput used by this facility in their AERs is at BARCT level. To mak e such a determination, a system

wide controlled emission factor using all available emission factors published by AQMD and

EPA must be first developed for this aggregate processing system

. In June 2007, the AQMD published a document providing PM emission factors for specific process equipment at Asphalt, Cement, Concrete and Aggregate Product Plants ( Attachment 1 ). The emission

factors in this document were derived from EPA AP

- 42 emission factors as well as the

emission data obtained from the last amendm ent to AQMD Rule 1157 in 2006 (all references and assumptions of the emission factors are listed in the last column of the table in this document). Each of these emission factors can be used to report PM emissions for a specific process equipment. These emission factors can also be used to develop a system

wide emission factor for a specific process system consisting of multiple process equipment based on the number and types of equipment that are included in such a system.

T he AQMD has used the equipme nt description information in the permit application file

and the controlled PM emission factors published in AQMD’s June 2007 document to develop a system

- wide co ntrolled emission factor for this aggregate processing system

. The system

- wide controlled PM emission factor for this aggregate process system is

calculated to be 12.5237 lbs/1,000 ton of throughput , higher than the PM emission factor of 11.8727 lbs/1,000 tons of throughput used by this facility in their AERs

. As a result, surplus adjustment i s not necessary for this aggregate processing system. The detailed analysis a nd calculations to develop the system

- wide controlled emission factor are included in the attached document ( Attachment 2 ).

• Oldcastle Westile, Inc. (ID 121816)

Oldcastle West ile, Inc. used to produce concrete roof tiles and the equipment u sed at this facility included cement slurry system (A/N 365063) and sand handling systems (A/Ns 365058 and 397235) in Corona California

. The cement slurry system was used to produce a

colore d slurry with water, cement and ferrous oxide pigments. The sand handling systems

were used to convey and screen washed sand, as well as to move cement from the cement

silo to the mixers. This was done with a number of cement conveyors that at some point s, share service with sand and aggregate and are collectively called “sand conveying” ( even though they also may convey dry cement into the mixers). There was no separate permit for conveying of cement into the mixers. Therefore, the sand handling system s also represents the cement contribution of that conveying. The PM10 credit calculations for this2 facility were based on the emissions reported in their AER for 2005

- 2006 and AER for 2006

- 2007. However, the annual emission reporting me thodology for AER 2005

- 2006 was different than the annual emission reporting methodology for AER 2006

- 2007. Prior to

2006

- 2007, the AQMD would allow the asphalt, cement, concrete and aggregate product plants to use their own emission factors developed based on the number of transfer points and types of equipment used at each plant. In June 2007, the AQMD published a document providing P M emission factors for specific process equipment at Asphalt, Cement, Concrete and Aggregate Product Plants ( Attachment 1 ) . Th e emission factors in this document were

derived from EPA AP

- 42 emission factors as well as the emission data obtained from the last

amendment to AQMD Rule 1157 in 2006 (all references and assumptions of the emission

factors are listed in the last column of the table in this document)

. Each of these emission factors can be used to report PM emissions for a specific process equipment. These

emission factors can also be used to develop a system

- wide emission factor for a specific process system consisting of multiple process equipment based on the number and types of
equipment that are included in such a system

.

Further, in order t o determine what, if any, s urplus adjustments are necessary for the reported emissions, one needs to evaluate the applicability of Rule 1 157 to the operations at this facility. Rule 1157 only applies to aggregate and related operations and aggregate operations are defined as operations that produce sand, gravel, crushed stone and/or quarried rocks and related operations are defined as oper ations that use sand, gravel, cement, crushed stone, and/or quarried rocks in their products, or crush miscellaneous base, and inert landfills that handle construction/demolition debris . However, i n order to be conservative, we can assume that Rule 1157 a lso applies to this facility which was engaged in production of concrete roof tiles. Therefore, i n order to calculate the s urplus adjusted credits for this facility, it is most appropriate to use the actual throughputs for AERs

2005

- 2006 and 2006

- 2007 alo ng with controlled emission factors based on the AQMD ’s June 2007 guidelines, as well as the number and types of equipment used at this facility to

establish system

- wide controlled emission factor s and use these emission factors to calculate the surplus ad justed credits.

To perform the surplus adjustment , the AQMD has used the equipment description information in the permit application file s and the controlled emission factors in AQMD ’s

June 2007 document to develop the system

- wide controlled emission fact ors for the cement slurry system and sand handling system at this facility

. The system

- wide controlled PM

emission factor is calculated to be 0.045 6 lb /ton of throughput for cem ent slurry system and

0.0127 lb /ton of throughput for the sand handling system

. The detailed analysis and calculations to develop these system

- wide controlled emission factors are included in the attached document ( Attachment 3 )

. Based on the throughput data reported in the AER

2005

- 2006 and AER 2006

- 2007, the total s urplus adjust ed PM10 emission cr edits for this facility is 1,510 lbs/year (Please refer to Attachment 4 for detailed calculations). Therefore,

the s urplus adjustments using the system

- wide controlled emission factors and throughput data reported in AER 2005

- 2006 and A ER 2006

- 2007 would reduce the total PM10 credits for this facility from the previously reported 2,108 lbs/year to 1, 510 lbs/year (a reduction of 598 lbs/year)

.

Please note that the proposed surplus adjustments for equipment at this facility are previously based on a system

- wide controlled emission factor of 0.0 446 lb /ton for cement3 slurry system resulting in a total surplus adjustment amount of 615 lbs/year . I have further reviewed the calculations for surplus adjustments again and found that the correct system

wide controlled emission factor for cement slurry system should be 0.0 456 lb /ton instead of

0. 0446 lb /ton. Using the correct emission factor of 0.0456 lb/ton, I have re

- calculated the total surplus adjustment amount for this facility to be 598 lbs/ year instead of 615 lbs/year

. As a result, t he total surplus adjustment amount for this facility is distributed to all three pieces of equipment as follows:

Equipment Description Appl ication

No

. PM10 Credit s before Adjust

(lbs/year) Surplus

Amount (lbs/y ear) PM10 Credit s after Adjust

(lbs/year)
Cement Slurry System 365063 146 146 0 Sand Conveying 365058 981 226 755 Sand Conveying 397235 981 226 755

Total: 2

, 108 598 1

, 510

• Elsinore Ready

- Mix (010873)

Elsinore Ready

- Mix operated a concrete batch pla nt (A/N 139185) and an aggregate handling system (A/N 229108) to produce various sizes of aggregate products in Lake
Elsinore, California. This facility reported PM emissions for the concrete batch plant and aggregate handling systems in their AERs using an emission factor of 10 lbs/1,000 tons of throughput and 2 lbs/1,000 tons of throughput , respectively.

The AQMD published a document entitled “Particulate Matter Emission Factors for Processes/Equipment at Asphalt, Cement, Concrete, and Aggregate Product Plants” in June 2007 ( Attachment 1 ). This document provides emission factors for specific process equipment at Asphalt, Cement, Concrete and Aggregate Product Plants

. The emission

factors in this document were derived from EPA AP

- 42 emission factors as well as the
emission data obtained from the last amendment to AQMD Rule 1157 in 2006 (all references and assumptions of the emission factors are listed in the last column of the table in this document) . Each of these emission factors can be used to report PM emissions for a specific process equipment. These emission factors can also be used to develop a system

wide emission factor for a specific process system consisting of multiple process equipment based on the number and types of equipment that are inc luded in such a system.

For the purpose of surplus adjustment, the AQMD is certain that the PM emission factor of 2 lbs/1000 tons used this facility ’s AERs meets, and is actually far below, the BARCT
requirement for an aggregate handling system consisting of numerous hoppers, feeders, crushers, screens, and conveyors. The prim ary sources of PM emissions from the aggregate handling system at this facility were the jaw crusher, cone crusher, and screens. All of the materials processed at this facility pass through at least the jaw crusher and two screens. As indicated on page 7 of Attachment 2 , the combined controlled emission factor for the jaw crusher and two screens alone is already 4.71 lbs/1000 ton (0.31 lb/1000 ton for the jaw crusher and 2.2 lb/1000 ton for each screen). The combined controlled emission factor for the entire aggregate crushing and screening system is expected to be significantly higher4 since additional PM emissions are generated when the materials are processed through a

cone crushe r, the remaining screens, and other transfer points (conveyors). As a result, the PM emission factor of 2 lbs/1000 ton used by Elsinore Ready

- Mix in their AER not only meets the BARCT requirement, but is at least 2.5 times lower than the BARCT emission

fa ctor representing emissions from this operation. As a result, no further surplus adjustment of PM10 credits is necessary for this aggregate handling system

To determine if a surplus adjustment is necessary for the concrete batch plant at this facility,

t he AQMD has used the equipment description information in the permit application files

and the controlled emission factors in AQMD’s June 2007 document to develop a system

wide controlled emission factor for the concrete batch plant. The system

- wide contr olled

PM emission factor for this concrete batch plant is calculated to be 9.68 lbs/1,000 ton of throughput. The detailed analysis and calculations to develop these system

- wide controlled

emission factors are included in the attached document ( Attachment 5 ). Based on the throughp ut of 515,860 tons/year reported by this facility in the ir AER 2000

- 2001 , the s urplus adjusted PM 10 credits for this concrete batch plant is calculated to be 1,248 lbs/year ( please

refer to Attachment 6 for detailed calculations ). Therefore, the surplus adjustment using the system

- wide controlled emission factor and thro ughput data reported in AER 2000

- 2001

would reduce the total PM10 credits for this concrete batch plant from the previously reported 1,290 lbs/year to 1, 248 lbs/ye ar (a reduction of 42 lbs/year).

• Whitewater Rock and Supply ( 005004)

Whitewater Rock and Supply operated two aggregate crushing systems (A/Ns 03115 E and 120515) to produce various sizes of aggregate products in Whitewater, California. The

PM10 credit c alculations for this facility were based on the emissions reported in their AER

for 2006

- 2007. The PM emissions reported in this facility’s AER 2006

- 2007 for their aggregate crushing systems, each consist of numerous hoppers, feeders, crushers, screens,

a nd conveyors, were based on the emission factors published in a document entitled “Particulate Matter Emission Factors for Processes/Equipment at Asphalt, Cement, Concrete, and Aggregate Product Plants” published by the AQMD in June 2007 ( Attachment

1 ). This document provides emission factors for specific process equipment at Asphalt, Cement, Concrete and Aggregate Product Plants. The emission factors in this document

were derived from EPA AP

- 42 emission factors as well as the emission data obtained from the last amendment to AQMD Rule 1157 in 2006 (all references and assumptions of the emission factors are listed in the last column of the table in this document). The total PM10 credits for these two aggregate crushing systems were originally calculated to be 4,837 lbs/year using the total PM emissions reported in AER 2006

- 2007 . The PM10 credits for each system were then calculated using the ratio of individual system process rate to the total process rate of two systems. The AQMD reviewed the permit ap plication files for these two systems and obtained the individual process rate for each system ( 25 tons/hr for system under A/N 03115E and 35 tons/hr for system under A/N 120515). Based on these process rates, the PM10 credit s for each system were calcula ted as follows:

A/N 03115E

– 4,837 lbs/year x [25/(25 + 35)] = 2,015 lbs/year A/N 120515

– 4,837 lbs/year x [35/(25 + 35)] = 2,821 lbs/year5 T he AQMD has reviewed this facility’s AER 2006

- 2007 and found that this facility used

uncontrolled emission factor s to report the PM emissions from all process equipment in

the se two aggregate crushing systems. As a result, surplus adjustment of PM10 credits is necessary for the aggregate crushing systems. To determine the amount of necessary surplus adjustment, the AQMD has repeated all emission calculations in this facility’s AER

2006

- 2007 using the AER throughput data and the controlled PM10 emission factors in EPA

AP

- 42, Table 11.19.2

- 2 for all process equipment in these two systems. As indicated in the

attache d spreadsheet ( Attachment 7 ), the total surplus adjusted PM10 credits for these two

systems are calculated to be 163 lbs/day. Based on the same individual process rate for each system, the surplus adjusted PM10 credits for each system are calculated as fo llows:

A/N 03115E

– 163 lbs/year x [25/(25 + 35)] = 68 lbs/year A/N 120515

– 163 lbs/year x [35/(25 + 35)] = 95 lbs/year

For the purpose of surplus adjustment, the PM10 credits before surplus adjustment, surplus adjustment amount, and PM10 credits after surplus adjustment for each of these two aggregate crushing systems are summarized as follows:

Equipment Description Application

No. PM10 Credit s before Adjust

(lbs/year) Surplus

Amount (lbs/year) PM10 Credit s after Adjust

(lbs/year)
Aggregate Crushing S ystem 03115E 2,015 1,947 68 Aggregate Crushing System 120515 2,821 2,726 95

Total: 4,836 4,673 163

### 1 

## Particulate Matter (PM) Emission Factors
For Processes/Equipment at
Asphalt, Cement, Concrete, a nd Aggregate Product Plants

June 2007

This document provides emission factors for estimating total suspended particulate matter (PM) emissions (not PM 10 ) for individual emission source at aggregate (sand and gravel), brick and tile, hot mix asphalt, cement, and concrete batch plants. Th ese factors are also applicable to emission sources other than processes identified in recently adopted Rules 1156 and 1157.

The factors and equations are extracted from the US EPA AP-42 document. Some of the complex equations are simplified with either default settings or assumptions that are applicable to the conditions and operations existing in the South Coast Air Basin as shown in the Reference column of the attached
table.

Facility is encouraged to apply specific parameters th at are applicable to its operations to calculate emissions from the equipment/proce sses including the results from approved source tests. Supporting

documents must be submitted with the Annual Emissi on Report to show the use of such parameters or source test results in calculating annual emissions.

In the absence of specific parameters and/or source t ests, facility can calculate its annual emissions using the factors provided in the attached table and the following equation.



## EF TP E × =

Where: E = Emission (tons/year)
TP = Annual Throughput

EF = Emission Factor

The unit for TP in this equation must be consistent w ith the unit of EF. For example, if EF is in pound per ton of material transferred (lb/ton), then TP must be tons of transferred material. For unique emission sources, additional data must be used in determini ng the factor (EF or TP) before it can be used in emission calculation as discussed in the following notes:

Note 1: For mining/quarrying, emission factor is expressed in pound per blast (lb/blast) and is
calculated as:

1.5 

### A 0.000014 EF × =

Where: A = Total horizontal blasted area in squared foot (ft 2 ), provided that the blast depth is less than 70 ft.

In this case, the throughput (TP) is number of blast per year.

### 2 Note 2: For road emissions (E) caused by vehicle traffic, the throughput is expressed in annual vehicle miles traveled (VMT) as follows:



###      

×      

×        

× = = 5,280ft 1Mile

Year

Days #
Day Trips Truck # Length Road VMT TP

Where: Road Length = One-way distance in f eet (ft) of paved or unpaved road within the facility, used by haul tr ucks and non-haul trucks.
# Truck Trips = the number of roundtrips the vehicle made.

Definitions:
Haul Road: an unpaved road used by haul tr ucks to carry materials fr om the quarry to the unloading/processing area within the facility.
Non-Haul Road: unpaved and/or paved road u sed by non-haul trucks to carry materials from

one location to another location within the fac ility, usually between the facility’s entrance/exit to loading/unloading/processing areas.

Note 3: For PM emissions (E) at each conveyor transfer point, the emission factor (lb/ton of material transferred) can be determined using the following equation:

4

. 1 3

. 1



### 2 5 0.0032 k EF            

× × = M U

Where: k = Particle Size Multiplier (dimensionless) U = Average Wind Speed (mile per hour) M. = Average Moisture Content (%)

Note 4: In addition to PM emissions, VOC emissions are also expected from asphalt product during loading out and silo filling operations. Emission factor (lb/ton of product loaded) is expressed
in as follows:



### ASPHALT LOAD-OUT



## ( ) ) 43

. 20 )) 460 ( 0251

. 0 ((

PM 

### V

- 0.00141 0.000181 EF

− + × 

### + = T 

### e 

# ( ) ) 43

. 20 )) 460 ( 0251

. 0 ((

VOC 

### V

- 0.0172 EF

− + × 

### = T 

### e

SILO FILLING



# ( ) ) 43

. 20 )) 460 ( 0251

. 0 ((

PM 

### V

- 0.00105 0.000332 EF
− + × 

### + = T 

### e 

# ( ) ) 43

. 20 )) 460 ( 0251

. 0 ((

VOC 

### V

- 0.0504 EF

− + × 

### = T 

### e

Where: V = Asphalt Volatility (in negative %); (Example -2.5%)
T = Asphalt Product Mix Temperature (degree F)Emission FactorReferencesOperation/Emission SourcesUnit AndUNCONTROLLEDCONTROLLEDAssumptions3ROAD EMISSIONS FROMVEHICLE TRAFFIC•PAVED ROADb3Wa2sLkVMTE×××=Where:E = PM emissionsTP = VMT = annual vehicle mile traveled(seeNote 2)b3Wa2sLkEF××=k = particle size multipliera, b = constantssL = road surface silt loading (g/m2)W = average weight (tons) of the vehicleAggregate / Crushed Material PlantsEF = 11.65EF = 2.33Hot Mix Asphalt PlantsEF = 14.73EF = 2.95Concrete BatchingEF = 4.91EF = 0.98Cement/Other PlantsEF = 4.19EF = 0.84lb/VMTlb/VMTlb/VMTlb/VMTChapter 13.2.1, Equation 1Assumptions:k = 0.082, a = 0.65, b = 1.5Aggregate / Crushed MaterialsL = 53 g/m2*Hot Mix AsphaltsL = 76 g/m2*Cement / Concrete / OtherssL = 11 g/m2*Control Efficiency = 80%WLoaded= 30 tonsWUnloaded= 5 tonsWUnloaded for concrete Batching= 12 tons*Per agreement between theDistrict & IndustryEmission FactorReferencesOperation/Emission SourcesUnit AndUNCONTROLLEDCONTROLLEDAssumptions4•UNPAVED ROADb3Wa12SkVMTE×××=Where:E = PM emissionsTP = VMT = annual vehicle mile traveled(seeNote 2)b3Wa12SkEF××=k = particle size multipliera, b = constantsS = surface material silt content (%)W = average weight (tons) of the vehicleAggregate PlantsHAUL VEHICLEEF = 16.36EF = 3.27NON-HAUL VEHICLEEF = 8.79EF = 1.76Other PlantHAUL VEHICLEEF = 14.66EF = 2.93NON-HAUL VEHICLEEF = 5.26EF =1.05lb/VMTlb/VMTlb/VMTlb/VMTAssumptions:k = 4.9, a = 0.7, b = 0.45HAULWLoaded= 120 tonsWUnloaded= 45 tonsSAggregate= 8.3%SOthers= 7.1%NON-HAULWLoaded= 30 tonsWUnloaded= 5 tonsSAggregate= 10%SOthers= 4.8 %Control Efficiency = 80%OPEN STORAGE PILETP = annual tonnage of stored material =amount of material loaded into, or out of,the pileEF = 0.33EF = 0.0165lb/tonChapter 11.19.1, Final Report,Table 4-1Control Efficiency = 95%Emission FactorReferencesOperation/Emission SourcesUnit AndUNCONTROLLEDCONTROLLEDAssumptions5MINING/QUARRYING•DRILLINGTP = number of hole drilled•BLASTING(seeNote 1)TP = number of blastEF = 1.3EF = 0.000014 (A)1.5lb/holelb/blastChapter 11.9, Table 11.9-4Chapter 11.9, Table 11.9-1LOADING / UNLOADING•CONVEYOR TRANSFER POINT4.13.1250032.0kEF××=MUk= Particle size multiplierM = Material moisture contentU = Mean wind speedFor a system of multiple transfer points, thisEF must be multiplied by the number oftransfer points (wherematerials drop fromone point to another). Refer to Rule 1157definition for more detail. Also seeNote 3.Aggregate/Crushed Miscellaneous Base/Asphalt PlantsEF = 0.00234EF = 0.00012Concrete Batching and OthersSAND:EF = 0.0021EF = 0.00011AGGREGATE:EF = 0.0069EF = 0.00035lb/tonlb/tonlb/tonChapter 13.2.4, Equation 1(b)Assumptions:k = 0.74U = 6.3 mphM = 2.5%Control Efficiency = 95%Emission FactorReferencesOperation/Emission SourcesUnit AndUNCONTROLLEDCONTROLLEDAssumptions6•WEIGHT HOPPER / SURGE BIN•SILOSCementCement Supplements (Fly Ash)•CONCRETE TRUCK MIXLOADING•CONCRETE CENTRAL MIXLOADING•ASPHALT PRODUCTS LOAD OUT(seeNote 4)•ASPHALT SILO FILLING(seeNote 4)EF = 0.0051EF = 0.00026EF = 0.72EF = 0.00099EF = 3.14EF = 0.0089EF = 0.995EF = 0.0568EF = 0.544EF = 0.0173PM:EF = 0.00052VOC:EF = 0.0042PM:EF = 0.00059VOC:EF = 0.0122lb/tonlb/tonlb/tonlb/tonlb/tonlb/tonlb/tonlb/tonlb/tonChapter 11.12, Table 11.12-2Control Efficiency = 95%Chapter 11.12, Table 11.12-2Control Efficiency = 99%Chapter 11.12, Table 11.12-2Chapter 11.12, Table 11.12-2Chapter 11.1, Table 11.1-14V=-0.5, T=325oFChapter 11.1, Table 11.1-14V=-0.5, T=325oFEmission FactorReferencesOperation/Emission SourcesUnit AndUNCONTROLLEDCONTROLLEDAssumptions7CRUSHING•PRIMARY CRUSHER•TERTIARY CRUSHER•FINE CRUSHEREF = 0.014*EF = 0.00031EF = 0.055*EF = 0.0012EF = 0.136*EF = 0.003* Based on using controlled EF & controlefficiency of 97.8%lb/tonlb/tonlb/tonChapter 11.6, Table 11.6-4Control Efficiency = 97.8%Chapter 11.19.2, Table 11.19.2-2Control Efficiency = 97.8%Chapter 11.19.2, Table 11.19.2-2Control Efficiency = 97.8%SCREENING•COARSE•FINE•SANDEF = 0.056*EF = 0.0022EF = 0.092*EF = 0.0036EF = 0.21*EF = 0.0083*Based on using controlled EF & controlefficiency of 96.1%lb/tonlb/tonlb/tonChapter 11.19.2, Table 11.19.2-2Control Efficiency = 96.1%Chapter 11.19.2, Table 11.19.2-2Control Efficiency = 96.1%Chapter 11.19.1, Final Report,Table 4-3Control Efficiency = 96.1%Emission FactorReferencesOperation/Emission SourcesUnit AndUNCONTROLLEDCONTROLLEDAssumptions8MILLING•GENERAL•CEMENTRaw MillFinish Grinding MillEF = 0.62*EF = 0.0062EF = 1.2*EF = 0.012EF = 0.8*EF = 0.008* Based on using controlled EF & controlefficiency of 99%lb/tonlb/tonlb/tonChapter 11.3, Table 11.3-1Control Efficiency = 99%Chapter 11.6, Table 11.6-4Control Efficiency = 99%OTHER PROCESS/EQUIPMENT•MATERIAL DRYERSAND and GRAVELBATCH MIX ASPHALTDRUM MIX ASPHALTBRICK MANUFACTURING•KILNSBRICKCEMENTCLINKER COOLEREF = 2.0EF = 0.039EF = 32EF = 0.042EF = 28EF = 0.033EF = 0.187EF = 0.96EF = 109*EF = 1.09EF = 14.7*EF = 0.147* Based on using controlled EF & controlefficiency of 99%lb/tonlb/tonlb/tonlb/tonlb/tonlb/tonlb/tonChapter 11.19.1, Table 11.19.1-1Chapter 11.1, Table 11.1-1Chapter 11.1, Table 11.1-3Chapter 11.3., Table 11.3-1Chapter 11.3., Table 11.3-1Chapter 11.6, Table 11.6-2Control Efficiency = 99%Chandler Aggregates (ID 108046)
System-Wide Controlled Emission Factor for Aggregate Processing System

350 ton/hr max

532011 YEAR 1 actual PW, tons

301 YEAR 1 operating days

257239 YEAR 2 actual PW, tons

198 YEAR 2 operating days

Emission Factors from PM Emission Factors for Processes/Equipment at Asphalt, Cement, Concrete, and Aggregate Plants, June 2007

EF PM lbs/ton
(uncontrolled) EF PM lbs/ton
(controlled)

Transfer 0.00234 0.00012 Jaw (primary) 0.014 0.00031 Cone (tertiary) 0.055 0.0012 Screen (coarse) 0.056 0.0022 Screen (fine) 0.092 0.0036 Screen (sand) 0.21 0.0083

Uncont Cont

3 transfer point 350.0 1.00 0.00234 0.00012 0.00702 0.0003600

1 screen (coarse) 350.0 1.00 0.05600 0.00220 0.05600 0.0022000

3 transfer point 262.5 0.75 0.00234 0.00012 0.00527 0.0002700

1 screen (coarse) 262.5 0.75 0.05600 0.00220 0.04200 0.0016500

1 transfer point 220.0 0.63 0.00234 0.00012 0.00147 0.0000754

2 transfer point 192.5 0.55 0.00234 0.00012 0.00257 0.0001320

1 screen (sand) 192.5 0.55 0.21000 0.00830 0.11550 0.0045650

6 transfer point 140.0 0.40 0.00234 0.00012 0.00562 0.0002880

1 screen (coarse) 140.0 0.40 0.05600 0.00220 0.02240 0.0008800

5 transfer point 87.5 0.25 0.00234 0.00012 0.00293 0.0001500

10 transfer point 70.0 0.20 0.00234 0.00012 0.00468 0.0002400

2 transfer point 52.5 0.15 0.00234 0.00012 0.00070 0.0000360

6 transfer point 50.0 0.14 0.00234 0.00012 0.00201 0.0001029

6 transfer point 40.0 0.11 0.00234 0.00012 0.00160 0.0000823

2 screen (fine) 40.0 0.11 0.09200 0.00360 0.02103 0.0008229

2 jaw (primary) 87.5 0.25 0.01400 0.00031 0.00700 0.0001550

2 cone (tertiary) 40.0 0.11 0.05500 0.00120 0.01257 0.0002743

1 cone (tertiary) 70.0 0.20 0.05500 0.00120 0.01100 0.0002400

0.32136 0.0125237

321.36 12.5237

*The process weight (PW) distribution for this aggregate processing system was included in a process flow diagram on A/N 167658. The fraction of the maximum PW for each processing equipment/transfer point was
calculated using the PW distribution specified on the flow diagram. Facility Wide Factor, lbs/ton
Facility Wide Factor, lbs/Mton Facility-Wide EF,
lbs/ton # of Transfer

Pts at PW Description PW, max* PW,

fraction of

max PW EF, lbs/ton
(uncont) EF, lbs/ton
(cont)

### 1 Oldcastle Westile, Inc. (ID 121816)

Cal culations for System

- Wide Controlled Emission Factors

Cement Slurry System

The cement slurry system was used to produce a colored slurry with water, cement, and ferrous
oxide pigments. Based on the engineering eval uation, dated July 3, 1979, cement from a silo is
fed by an enclosed screw conveyor into a ceme nt weigh hopper . The cement is gravity
discharged into a mixing machine with measured quantities of water and ferrous oxide
pigments. The mixture is agitated t o form a colored slurry which is used is used to provide a
finished colored surface to concrete roof tiles. The cement screw conveyor and cement weigh

hopper are completely enclosed . F eeding of the cement into the mix er may cause some fugitive dust emiss ions, but water added to the mixer minimizes these emissions. A flexible
feed duct from the weigh hopper to the mixer vents emissions generated by transfer of cement
from the screw conveyor to the weigh hopper to the mixer, where the emissions are minimiz ed
by water added to the mixer. Use of 95% control efficiency for the use of water is acceptable
for emissions generated by these two transfer points. Calculation s of the system

- wide

controlled emission factor may be found in Attachment 1.

Sand Handling System

The sand handling system was used to convey and screen washed sand. Based on the
engineering evaluation, dated January 26, 1995, the moisture content of the sand ranged from

7

- 11%. The sand was considered “wet” and Achieved in Practice as BACT. Also according to
the evaluation, the system was comprised of nine transfer points, for which emissions were
estimated using conveyor transfer points emission factors and an emission factor for sand
screening. All transfer points for this system are ide ntified in the accompanying calculations for

the system

- wide controlled emission factor (Attachment 2) . The use of controlled emission
factors is appropriate since the sand is wet (7

– 11%) and was considered AIP BACT.

### 2 Attachment 1 (Cement Slurry System)

The cement slurry system consists of three transfer points:

1. Cement silo loading

2. Transfer from screw conveyor to cement hopper

3. Transfer from hopper to slurry mixer

E mission factors are published in AP

- 42, Chapter 11 as well as the District’s AER G uideline s entitled “Particulate Matter (PM) Emission Factors For Processes/Equipment at Asphalt,

Cement, Concrete, and Aggregate Product Plants, June 2007”

.

1. Cement silo loading = 0.00099 lbs/ton PM controlled by filter, AP

- 42 Table 11.12

- 2 and
Page 6 of the Distri ct’s AER Guidelines

2. Transfer to hopper = 0.0016 lbs/1000 lbs PM controlled by fabric filter, AP

- 42 Table

11.26

- 1. This factor is for ground talc storage bin loading, which is comparable to

cement hopper loading.

a. EF = 0.0016 lbs/1000 lbs = 0.0032 lbs/ton c ontrolled

b. EF uncontrolled = (0.0032 lbs/ton)/(0.01) = 0.32 lbs/ton

c. EF controlled with water @ 95% = (0.32 lbs/ton)(1

– 0.95) = 0.016 lbs/ton PM

3. Transfer to mixer = 0.572 lbs/ton PM uncontrolled, AP

- 42 Table 11.12

- 2 for mixer

loading

a. EF controlled with wate r @ 95% = (0.572 lbs/ton)( 1

– 0.95) = 0.0286 lbs/ton PM

4. System

- Wide Controlled Emission F actor = 0.00099 lb/ton + 0.016 lbs/ton + 0.0286

lbs/ton = 0.0456 lbs/ton PM

### 3 Attachment 2 (Sand Handling System)

The sand handling system consists of nine transfer po ints:

1. Belt to reversing belt

2. Belt to silo

3. Silo

4. Belt to screen

5. Screen

6. Screen to belt

7. Belt to belt

8. Belt to hopper

9. Hopper

Emission factors are published in the District’s AER Guidelines entitled “Particulate Matter (PM)

Emission Factors For Processes /Equipme nt at Asphalt, Cement, Concrete, and Aggregate

Product Plants, June 2007”.

Conveyor transfer point s (Page 5 of the District’s AER Guidelines)

Except for the screen, emissions from each transfer point can be represented by the conveyor
transfer point formul a. This factor is considered controlled due to moisture content of sand.

EF = k ( 0.0032) (U/5) 1.3 

### /(M/2) 1.4



### w here,
k = particle size = 0.74 for < 30 μm
U = wind speed = 6.3 mph (default from AER)

M = m oisture content = 7% minimum from engineering evaluati on

EF = (0.74)(0.0032)(6.3/5) 1.3 

### /(7/2) 1.4 

### = 0.00055 lbs/ton PM

Sand screen (Page 7 of the District’s AER Guidelines)

EF = 0.0083 lbs/ton PM, controlled, from AER 2007 guidance

System

- Wide Controlled Emission Factor

EF = 8 * conveyor transfer point + sand screen = (8)*0.00055 + 0.0083 = 0.0127 lbs/ton PMOldcastle Westile Inc. (ID 121816)
Surplus Adjustment for PM10 Credits Based on System-Wide Controlled Emission Factors

Throuhput (tons/year) PM

Emission (lbs/year) Througput (tons/year) PM

Emissions (lbs/year)

365063 Cement Slurry System 0.0456 32,032 1,461 37,634 1,716 1,588 794 365058/397235 Sand Handling System 0.0127 120,598 1,532 104,873 1,332 1,432 716

Total: 3,020 1,510 2,108 598 AER 2006-2007 AER 2005-2006 Average

PM (lbs/year) Average

PM10 (lbs/year) Appl No Equipment Emission

Factor (lbs/ton) PM10

Credits in

SIP Revision

(lbs/year) Surplus
Adjustment

Amount (lbs/year)Elsinore Ready Mix (ID 010873)
System-Wide Controlled PM Emission Factor for Concrete Batch Plant

Operating Schedule 8 hr/day 1 cubic yard of concrete: 3293 0.818 lbs, aggregate/sand

6 day/week 564 0.140 lbs, cement/supplement

52 week/yr 167 0.042 lbs, water

180 cu yd/hr 4024 lbs/cu yd

4024 lbs/cu yd

362.16 ton/hr concrete

2897.28 ton/day concrete

Emission Factors from PM Emission Factors for Processes/Equipment at Asphalt, Cement, Concrete, and Aggregate Products Plants, June 2007

uncont cont Weigh hopper/surge bin loading 0.0051 0.00026 lbs/ton of aggregate/sand Conveyor transfer point 0.0069 0.00035 lbs/ton of aggregate/sand Concrete truck mix loading 0.995 0.0568 lbs/ton of cement/supplement

PM Emissions from Permit Unit

Emission Point PW, tph EF uncont,
lbs/ton EF cont,
lbs/ton R1, lbs/hr R2, lbs/hr R1, lbs/day R2, lbs/day

Receiving hopper loading 296.37 0.0069 0.00035 2.045 0.104 16.36 0.83 Hoppers to belt conveyors 296.37 0.0069 0.00035 2.045 0.104 16.36 0.83 Conveyors to surge bin 296.37 0.0069 0.00035 2.045 0.104 16.36 0.83 Surge bin to agg weigh hopper 296.37 0.0069 0.00035 2.045 0.104 16.36 0.83 Weigh hopper (agg) to belt conveyor 296.37 0.0069 0.00035 2.045 0.104 16.36 0.83 Belt conveyor to loadout 296.37 0.0069 0.00035 2.045 0.104 16.36 0.83 Weigh hopper (cement) to loadout* 50.76 0.995 0.0568 50.506 2.883 404.05 23.07
Total 62.776 3.506 502.21 28.0444

Facility Wide Factor - does not include emissions from cement/flyash silo loading

Total daily emissions, lbs 28.04 Total daily throughput, tons 2897.28 PM Emissions, lbs/ton 0.009680 PM Emissions, lbs/Mton 9.680Elsinnore Ready-Mix (ID 010873)
Surplus Adjustment Calculations for Concrete Batch Plant

PM10 Credits for Shutdown of Concrete Batch Plant Listed on Offset Source Calculation/Verification Form

AER Throughput (1000 tons/year) PM Emission Factor (lbs/1000 tons) PM Emissions (lbs/year) PM10 Credits (lbs/year;
PM10 = 50% PM)

2000-2001 515.86 10 5158.60 2579

2001-2002 0 0 0 0 Average of 2 years: 1290

PM10 Credits for Shutdown of Concrete Batch Plant After Surplus Adjustment

AER Throughput (1000 tons/year) PM Emission Factor (lbs/1000 tons) PM Emissions (lbs/year) PM10 Credits (PM10 = 50% PM; lbs/year)

2000-2001 515.86 9.68 4993.52 2497

2001-2002 0 0 0 0 Average of 2 years: 1248

Reduction of PM10 Credits Due to Surplus Adjustment: 1290 - 1248 = 42Whitewater Rock and Supply (ID 005004)
Calculations for Surplus Adjusted PM10 Emissions for Aggregate Crushing Systems



# AER 2006-2007

2006-2007 A/N 120515 (Permit No.: M 41985; 35 tons/hr Unit) [35/(35+25)] *(Total PM10) in lb] 95

A/N 03115E (Permit No.: E 05327; 25 tons/hr Unit) [25/(35+25) * (Total PM10) in lb] 68

Row Process Annual Throughput
or Operating Hours Unit PM10 Emission

Factor (lb/ton) PM10 Emissions (lb)

1 Material Handling/Loading/Unloading - Aggregate Plant 77,024.00 1 ton 4.60E-05 3.54

2 Aggregate Plant - Crusher 77,024.00 1 ton 5.40E-04 41.59

3 Aggregate Plant - Screener 77,024.00 1 ton 7.40E-04 57.00

4 Aggregate Plant - Conveyor/Transfer 38,512.00 1 ton 4.60E-05 1.77

5 Aggregate Plant - Conveyor/Transfer 38,512.00 1 ton 4.60E-05 1.77

6 Aggregate Plant - Conveyor/Transfer 38,512.00 1 ton 4.60E-05 1.77

7 Aggregate Plant - Conveyor/Transfer 38,512.00 1 ton 4.60E-05 1.77

8 Material Handling/Loading/Unloading - Aggregate Plant 38,512.00 1 ton 4.60E-05 1.77

9 Aggregate Plant - Conveyor/Transfer 38,512.00 1 ton 4.60E-05 1.77

10 Aggregate Plant - Screener 38,512.00 1 ton 7.40E-04 28.50

11 Aggregate Plant - Conveyor/Transfer 27,035.00 1 ton 4.60E-05 1.24

12 Aggregate Plant - Conveyor/Transfer 27,035.00 1 ton 4.60E-05 1.24

13 Aggregate Plant - Conveyor/Transfer 9,012.00 1 ton 4.60E-05 0.41

14 Aggregate Plant - Conveyor/Transfer 9,012.00 1 ton 4.60E-05 0.41

15 Aggregate Plant - Conveyor/Transfer 2,465.00 1 ton 4.60E-05 0.11

16 Aggregate Plant - Conveyor/Transfer 2,465.00 1 ton 4.60E-05 0.11

17 Aggregate Plant - Conveyor/Transfer 13,479.00 1 ton 4.60E-05 0.62

18 Aggregate Plant - Fines 13,479.00 1 ton 1.20E-03 16.17

19 Aggregate Plant - Conveyor/Transfer 13,479.00 1 ton 4.60E-05 0.62

20 Aggregate Plant - Conveyor/Transfer 13,479.00 1 ton 4.60E-05 0.62

21 Blending, mixing and packaging 580.00 1 ton 4.12E-04 0.24

22 Gasoline storage and dispensing 2.18 1,000 Gallons 0.00E+00 0.00

23 Diesel storage and dispensing 16.49 1,000 Gallons 0.00E+00 0.00

163.08 Total