### From: Emmanuel Quizon [equizon@aqmd.gov]

Sent: Wednesday, July 17, 2013 12:48 PM

To: Land, Eva

Cc: Fred Del Rosario

Subject: RE: Particulate Emissions from Spraying Operation

Eva,

I am not sure about the date but the 20% fall

- out factor was derived from a field evaluation done by a

permit engineer.

Emmanuel

From: Land, Eva [ mailto:Land.Eva@epa.gov ]

Sent: Wednesday, July 17, 2013 7:18 AM

To: Emmanuel Quizon

Subject: RE: Par ticulate Emissions from Spraying Operation



### Emmanuel,

Do you happen to know how the 20% fall

- out factor was derived?

Thanks again!

Eva Land

Air Permits Section

EPA

- Region 4

61 Forsyth St., SW

Atlanta, GA 30303

Phone: 404

- 562

- 9103

From: Emmanuel Quizon [ mailto:equizon@aqmd.gov ]

Sent: Tuesday, July 16, 2013 11:47 AM

To: Land, Eva

Subject: RE: Particulate Emissions from Spraying Operation



### Eva,

For materials with very high solids we do not increase the fall

- out factor We usually do a field

evaluation to observe the spraying operation. High

- solids materials tend to be very viscous thus

increasing the transfer efficiency.

With your other questio n regarding PM

10 

### and PM

2.5 

### , we do not differentiate between the two. As of

now we only keep track of PM

10 

### in our New Source Review (NSR) database.

EmmanuelFrom: Land, Eva [ mailto:Land.Eva@epa.gov ]

Sent: Monday, July 15, 2013 2:01 PM

To: Emmanuel Quizon

Subject: RE: Particulate Emissions from Spraying Operation



### Emmanuel,

Also, would the fall

- out factor change depending on the paint? For example if one paint has a

significantly higher solids factor?

Than ks again.

Eva Land

Air Permits Section

EPA

- Region 4

61 Forsyth St., SW

Atlanta, GA 30303

Phone: 404

- 562

- 9103

From: Emmanuel Quizon [ mailto:equizon@aqmd.gov ]

Sent: F riday, July 12, 2013 4:10 PM

To: Land, Eva

Subject: Particulate Emissions from Spraying Operation



### Eva,

Below is the equation and the filter control efficiency we used for calculating particulate emissions from

spraying operation. For spray equipment oth er than HVLP or electrostatic spray gun we use a transfer

efficiency of 35% unless test data on the spray gun transfer efficiency is provided and approved by the

SCAQMD. For open spray equipment we use a fall

- out factor of 20%. No fall

- out factor is give n for

coating operation using a spray booth because all the overspray should be collected by the spray booth.

For wet coating operation we assume that 50% of PM is PM

10



### . For powder coating operation we

assume that PM is equal to PM

10



### .

If you have any question you can give me a call at (909) 396

- 2523.

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