TITLE 7 NATURAL RESOURCES & ENVIRONMENTAL CONTROL
 

DELAWARE ADMINISTRATIVE CODE
 

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1100 Air Quality Management Section 

1125 Requirements for Preconstruction Review 

[08l11l2005 XJ<1xxlxx 04/11/2010] 

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3.0 Prevention of Significant Deterioration of Air Quality 

3.1 Definitions - For the purposes of 3.0 of this regulation: 

"Major Stationary Source" means: 

Any of the following stationary sources of air pollutants which emits or has the potential to 

emit. 100 tons per year or more of any pollutant subject to regulation under the CM: 

fossil fuel-fired steam electric plants of more than 250 million British thermal units per 

hour heat input, coal cleaning plants (with thermal dryers). kraft pulp mills, portland 

cement plants, primary zinc smelters, iron and steel mill plants, primary aluminum ore 

reduction plants, primary copper smelters, municipal incinerators capable of charging 

more than 250 tons of refuse per day, hydrofluoric, sulfuric, and nitric acid plants, 

petroleum refineries, lime plants, phosphate rock processing plants, coke oven batteries, 

sulfur recovery plants, carbon black plants (furnace process), primary lead smelters, fuel 

conversion plants, sintering plants, secondary metal production plants, chemical process 

plants, fossil fuel boilers (or combinations thereof) totaling more than 250 million British 

thermal units per hour heat input, petroleum storage and transfer units with a total storage 

capacity exceeding 300,000 barrels, taconite ore processing plants, glass fiber 

processing plants, and charcoal production plants; 

Notwithstanding the stationary source size specified in the above paragraph, any 

stationary source which emits, or has the potential to emit, 250 tons per year or more of 

any air pollutant subject to regulation under the CM; or 

Any physical change that would occur at a stationary source not otherwise qualifying 

under the preceding paragraph as a major stationary source, if the change would 

constitute a major stationary source by itself. 

A major stationary source that is major for volatile organic compounds or nitrogen oxides 

shall be considered major for ozone. 

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3.7.7.1	 The emissions increase of the pollutant from the new source or the net emissions 

increase of the pollutant from the modification would cause, in any area. air 

quality impacts less than the following amounts 

Carbon monoxide: 575 ug/m3

, eight-hour average;
 

Nitrogen dioxide: 14 ug/m3

, annual average;
 

Total suspended particulate: 10 ug/m3

, 24-hour average;
 

Sulfur dioxide: 13 ug/m3

, 24-hour average;
 

Ozone: (See Note 1)
 
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TITLE 7 NATURAL RESOURCES & ENVIRONMENTAL CONTROL
 

DELAWARE ADMINISTRATIVE CODE
 

Lead: 0.1 ug/m3

, 24-hour average; 

Mercury: 0.25 ug/m3

, 24-hour average; 

Beryllium: 0.0005 ug/m3

, 24-hour average; 

Fluorides: 0.25 ug/m3

, 24-hour average; 

Vinyl chloride: 15 ug/m3

, 24-hour average; 

Total reduced sulfur: 10 ug/m3

, one-hour average; 

Hydrogen sulfide: 0.04 ug/m3

, one-hour average; 

Reduced sulfur compounds: 10 ug/m3

, one-hour average; 

PM10 particulate: 10 ug/m3

, 24-hour average 

[Note 1: No de minimus air quality level is provided for ozone. However, any net 

increase of 100 tons per year or more of volatile organic compounds Qr.illtrogen 

Qxides sUbject to PSD would be required to perform an ambient impact analysis 

including the gathering of ambient air quality data.] 

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3.11.1.5	 The owner or operator of a proposed stationary source or modification of volatile 

organic compounds or nitrogen oxides who satisfies all of the following conditions 

may provide post-approval monitoring data for ozone in lieu of providing 

preconstruction data as required under 3.11.1 of this regulation. 

Condition 1: The new source is required to meet an emission limitation which 

specifies the lowest achievable emission rate for such source. 

Condition 2: The applicant must certify that all existing major sources owned or 

operated by the applicant (or any entity controlling, controlled by, or under 

common control with the applicant) in Delaware are in compliance with all 

applicable emission limitations and standards under the CAA (or are in 

compliance with an expeditious schedule approved by the Department). 

Condition 3: Emission reductions ("offsets") from existing sources in the area of 

the proposed source (Whether or not under the same ownership) are required 

such that there will be reasonable progress toward attainment of the applicable 

NAAQ8. Only intrapollutant emission offsets will be acceptable (e.g., 

hydrocarbon increases may not be offset against 802 (reductions)). 

Condition 4: The emission offsets will provide a positive net air quality benefit in 

the affected area (see 40 CFR Part 51 App. 8). Atmospheric simulation modeling 

is not necessary for volatile organic compounds and NOx. Fulfillment of Condition 

3 will be considered adequate to meet this condition for volatile organic 

compounds and NOx.