EXH 323 (AR020491): Petroleum Hydrocarbon Fraction Compositions — Standard Fuel Modeling & Site Data

This document presents chemical composition data for various petroleum fuel types, including fresh gasoline, weathered gasoline, fresh diesel, weathered diesel, and heavy fuel oil. It breaks down the percentage and concentration (mg/kg) of aliphatic and aromatic hydrocarbon fractions across different carbon chain length ranges. The data appears to support environmental modeling and site assessment work, likely related to fuel spill or contamination analysis.

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Exhibit 323 (AR020491–AR020492) from the PCHB Third Runway EIS administrative record. Table of petroleum hydrocarbon chemical compositions by weight percent and mg/kg for Fresh Gasoline, Weathered Gasoline, Fresh Diesel, Weathered Diesel, and Heavy Fuel Oil. Fractions include aliphatic groups AL >5-6, AL >6-8, AL >8-10, AL >10-12, AL >12-16, AL >16-35 and aromatic groups AR >8-10, AR >10-12, AR >12-16, AR >16-21, AR >21-35, plus benzene (B), toluene (T), ethylbenzene (E), xylenes (X), and naphthalene. Referenced author Seehan, Charles; document describes standard fuel modeling and site data for environmental/contamination analysis associated with Sea-Tac Airport third runway EIS proceedings before the Pollution Control Hearings Board.

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