SECTION 4: RISK ASSESSMENT
Table 4.132 shows the estimated exposure by occupancy that would occur within 0.5 miles of the TRI sites located in Wake County. Residential occupancy represents the majority of exposure at 95 percent. Additionally, Table 4.133 shows the total exposure and estimated structure and content values by jurisdiction within 0.5 miles of the TRI sites located in Wake County. Table 4.132 - Total Exposure to HAZMAT by Occupancy within 0.5 Miles in Wake County
Estimated Parcel Count
Estimated Content Value
Occupancy
Structure Value
Total Value
Agriculture
578
$202,361,744
$202,361,744
$404,723,488
Commercial
6352
$22,873,407,312
$22,873,407,312
$45,746,814,624
Education
352
$5,836,287,982
$5,836,287,982
$11,672,575,964
Government
1076
$8,673,014,682
$8,673,014,682
$17,346,029,364
Industrial
2071
$7,122,677,973
$10,684,016,960
$17,806,694,933
Religious
779
$2,455,280,875
$2,455,280,875
$4,910,561,750
Residential
258877
$115,611,444,640
$57,805,722,320
$173,417,166,960
Total
270,085
$162,774,475,208
$108,530,091,875
$271,304,567,083
Source: EPA, GIS Analysis Table 4.133 – Total Exposure to HAZMAT by Jurisdiction within 0.5 Miles in Wake County
Estimated Parcel Count
Estimated Content Value
Jurisdiction
Structure Value
Total Value
Apex
18,957
$10,106,992,575
$6,273,327,367
$16,380,319,942
Cary
44,924
$30,101,760,659
$18,800,158,720
$48,901,919,379
Fuquay-Varina
10,499
$4,764,728,865
$3,019,130,233
$7,783,859,098
Garner
11,442
$5,965,425,186
$4,588,019,286
$10,553,444,472
Holly Springs
7,941
$5,524,974,346
$3,924,305,674
$9,449,280,020
Knightdale
6,707
$3,169,303,614
$2,198,808,422
$5,368,112,036
Morrisville
6,801
$6,206,358,382
$4,617,526,222
$10,823,884,604
Raleigh
116,636
$73,198,579,694
$50,137,784,703
$123,336,364,397
Rolesville
2,991
$1,455,441,787
$832,910,928
$2,288,352,715
Wendell
4,048
$1,420,726,324
$963,697,587
$2,384,423,911
Wake Forest
11,035
$6,013,467,284
$3,809,550,878
$9,823,018,162
Zebulon
3,013
$1,211,897,515
$1,027,395,615
$2,239,293,130
Unincorporated Wake County
25,091
$13,634,818,977
$8,337,476,242
$21,972,295,219
Total
270,085
$162,774,475,208
$108,530,091,875
$271,304,567,083
Source: EPA, GIS Analysis EXTENT
The magnitude of a hazardous materials incident can be defined by the material type, the amount released, and the location of the release. The USDOT’s PHMSA, which records hazardous material incidents across the country, defines a “serious incident” as a hazardous materials incident that involves:
• A fatality or major injury caused by the release of a hazardous material,
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 251
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