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General Plan Update - City of Inglewood

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5.6 Air Quality<br />

warm, stable periods in the summer and autumn. PM 10 can be generated in large amounts<br />

by construction activity, especially activities that involve grading <strong>of</strong> land. CO<br />

concentrations are highest near heavy traffic areas near large business districts or on<br />

freeways.<br />

The <strong>City</strong> <strong>of</strong> <strong>Inglewood</strong> is located within SRA 3, which covers the southwest Los Angeles<br />

County coastal area. Air quality for SRA 3 is measured at the Hawthorne Monitoring<br />

Station. Criteria pollutants monitored at the Hawthorne Monitoring Station include O 3 ,<br />

CO, PM 10 , NO 2 , and SO 2 . The nearest, most representative monitoring station for PM 2.5<br />

is the Lynwood Monitoring Station, located within SRA 12 (South Central Los Angeles<br />

County). The most recent data available for the Hawthorne and Lynwood Monitoring<br />

Stations encompasses up to year 2005. Table 5.6-1 identifies the national and state<br />

ambient air quality standards for air pollutants along with the ambient pollutant<br />

concentrations that have been measured at the Hawthorne and Lynwood Monitoring<br />

Stations from 2003 to 2005.<br />

Table 5.6-1<br />

Summary <strong>of</strong> Ambient Air Quality Data<br />

Year<br />

Air Pollutants 2003 2004 2005<br />

Ozone (O3)<br />

Maximum one-hour concentration<br />

measured<br />

0.11 ppm a 0.12 ppm 0.09 ppm<br />

Number <strong>of</strong> days exceeding state<br />

0.09 ppm one-hour standard<br />

2 4 0<br />

Maximum eight-hour concentration<br />

measured<br />

0.08 ppm 0.10 ppm 0.08 ppm<br />

Number <strong>of</strong> days exceeding national<br />

0.08 ppm eight-hour standard<br />

0 4 0<br />

Carbon Monoxide (CO) b<br />

Maximum one-hour concentration<br />

measured<br />

Number <strong>of</strong> days exceeding national<br />

35 ppm one-hour standard<br />

Number <strong>of</strong> days exceeding state 20<br />

ppm one-hour standard<br />

Maximum eight-hour concentration<br />

measured<br />

Number <strong>of</strong> days exceeding national<br />

9 ppm eight-hour standard<br />

Number <strong>of</strong> days exceeding state 9.0<br />

ppm eight-hour standard<br />

Nitrogen Dioxide (NO2)<br />

Maximum one-hour concentration<br />

measured<br />

Number <strong>of</strong> days exceeding state<br />

0.25 ppm one-hour standard<br />

7 ppm 6 ppm 3 ppm<br />

0 0 0<br />

0 0 0<br />

5.0 ppm 4.4 ppm 2.2 ppm<br />

0 0 0<br />

0 0 0<br />

0.12 ppm 0.09 ppm 0.09 ppm<br />

0 0 0<br />

<strong>City</strong> <strong>of</strong> <strong>Inglewood</strong> <strong>General</strong> <strong>Plan</strong> <strong>Update</strong> Technical Background Report<br />

5.6-9

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