CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 1

(Electronic Format) 

I. GENERAL INFORMATION

District: Placer County Air Pollution Control District

Rule No(s): 502 Date adopted/Amended/Rescinded: February 11, 2010

Rule Title(s): New Source Review

Date Submitted to ARB: February 26, 2010

If an Amended Rule, Date Last Amended (or Adopted): December 9, 2004

Is the Rule Intended to be Sent to the U.S. EPA as a SIP Revision? Yes No (If No, do not complete remainder of form)

District Contact: Don Duffy Phone Number: (530) 745-2336 E-mail Address: dduffy@placer.ca.gov

Narrative Summary of New Rule or Rule Changes: New Rule Amended Rule 

This rule establishes procedures for the review of new and modified stationary air pollution sources and provides 

mechanisms, including emission offsets, by which authorities to construct for such sources may be granted 

without interfering with the attainment or maintenance of ambient air quality standards. Existing Rule 502 wording 

is being repealed in its entirety and being replaced with the proposed wording. 

The proposed amended rule updates definitions and provisions to comply with EPA’s NSR (New Source Review) 

Reform regulations. Additional significant changes from the current rule include:

• Add PM2.5 as a non-attainment pollutant

• Increase the CO offset threshold to 99 tons/year

• Increase the SOx offset threshold to 27.5 tons/year

• Provide separate requirements for major sources and non-major sources

• Remove offset requirements for the Lake Tahoe Air Basin

Placer County is in the unusual circumstance among air districts in that it consists of three separate air basins; 

Sacramento Valley, Mountain Counties, and Lake Tahoe. Each air basin has its own federal attainment status. 

Sacramento Valley is non-attainment for ozone and PM10, Mountain Counties is non-attainment for ozone, and 

Lake Tahoe is in attainment of all air quality standards.

The existing Rule 502 reviews all sources using the same criteria, whether major or minor source in all air basins. 

The criteria treat all sources as major sources in the non-attainment area. Federal and state law allows more 

lenient treatment of minor sources and sources in attainment areas. The proposed Rule 502 takes advantage of 

more lenient rules for non-major sources in both non-attainment areas and attainment areas.

The District’s portion of the Sacramento Valley Air Basin has recently been declared by EPA as non-attainment 

for PM2.5. This rule amendment adds PM2.5 as a NSR regulated pollutant and non-attainment pollutant.

Pollutant(s) Regulated by the Rule (Check): ROG (NOx) SO2 

 (CO) PM TAC (name): 

II. EFFECT ON EMISSIONS

Complete this section ONLY for rules that, when implemented, will result in quantifiable changes in emissions. Attach reference(s) for emission factor(s) 

and other information. Attach calculation sheet showing how the emission information provided below was determined. 

Net Effect on Emissions: Increase Decrease N/A 

Emission Reduction Commitment in SIP for this Source Category: 
CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 2

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Inventory Year Used to Calculate Changes in Emissions: Area Affected: 

Future Year Control Profile Estimate (Provide information on as many years as possible): 

 
CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 3

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5/1/2002 

3

Baseline Inventory in the SIP for the Control Measure: 

Emissions Reduction Commitment in the SIP for the Control Measure: 

Revised Baseline Inventory (if any): 

Revised Emission Reduction Estimate (if developed): 

Note that the district’s input to the Rule Evaluation Form will not be used as input to the ARB’s emission forecasting and 

planning. 

III. SOURCES/ATTAINMENT STATUS

District is: Attainment Nonattainment Split 

Approximate Total Number of Small (<100 TPY) Sources Affected by this Amendment: 721

Percent in Nonattainment Area: 99% 

Number of Large (> 100 TPY) Sources Controlled: 4 Percent in Nonattainment Area: 100% 

Name(s) and Location(s) (city and county) of Large (> 100 TPY) Sources Controlled by Rule (Attach additional sheets as 

necessary): Sierra Pacific Industries (Lincoln), SierraPine (Rocklin), PABCO Building Products (Lincoln), and Rio Bravo 

(Rocklin).

IV. EMISSION REDUCTION TECHNOLOGY

Does the Rule Include Emission Limits that are Continuous? Yes No 

If Yes, Those Limits are in Section(s) of the Rule. 

Other Methods in the Rule for Achieving Emission Reductions are: BACT and Offsets

V. OTHER REQUIREMENTS

The Rule Contains: 

Emission Limits in Section(s): 302 (BACT) and 303 (Offsets) Work Practice Standards in Section(s): 

Recordkeeping Requirements in Section(s): 601 Reporting Requirements in Section(s): 
CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 4

(Electronic Format) 

VI. IMPACT ON AIR QUALITY PLAN

 No Impact Impacts RFP Impacts attainment 

Discussion: