Supporting Documentation · Apr 15, 2026
Stormwater Management Report Revised as of 01282026 4936 0314 8685 v2
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Show all pagesFpC,q 1.227 Site amplification factor at PGA PGAM 0.213 Site modified peak ground acceleration T~ 6 Long-period transition period (s) SsRT 0.282 Probabilistic risk-targeted ground motion (0.2s) SsUH 0.302 Factored uniform-hazard spectral acceleration (2%probability of exceedance in 50 years) SsD 1.5 Factored deterministic acceleration value (0.2s) S1RT 0.059 Probabilistic risk-targeted ground motion (1.Os) S1UH 0.063 Factored uniform-hazard spectral acceleration (2% probability of exceedance in 50 years) S1D 0.6 Factored deterministic acceleration value (1.Os) PGAd 0.5 Factored deterministic acceleration value (PGA) The results indicated here DO NOT reflect any state or Coca! amendments to the values or any delineation fines made during fhe building code adoption process. Users should confirm any output obtained from this tool with the local Ruthority Having Jurisdiction before proceeding with design, Please nofe that the ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why. ©isclaimer Hazard loads are provided by the U.S. Geological Survey Seismic Design Web Services. While the information presented on this website is believed to be correct, ATC and its sponsors and contributors assume no responsibility or liability for its accuracy. The material presented in the report should not be used or relied upon for any specific application without competent examination and verification of its accuracy, suitability and applicability by engineers or other licensed professionals. ATC does not intend that the use of this information replace the sound judgment of such competent professionals, having experience and knowledge in the field of practice, nor to substitute for the standard of care required of such professionals in interpreting and applying the results of the report provided by this website. Users of the information from this website assume all liability arising from such use. Use of the output of this website does not imply approval by the governing building code bodies responsible for building code approval and interpretation for
ssume all liability arising from such use. Use of the output of this website does not imply approval by the governing building code bodies responsible for building code approval and interpretation for the building site described by latitude/longitude location in the report.
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- Sep 29, 2026
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