| First Name | Neil |
|---|---|
| Last Name | Hammel |
| Email Address | neil@vcapcd.org |
| Affiliation | Ventura County APCD |
| Subject | Correction to Surface Tension Calculation using Stalagmometer |
| Comment | The listed surface tension of water at 25 degrees celcius (72.75 dynes/cm) in now appendix 7 is actually the surface tension of water at 20 degrees celcius. The correct surface tension of water at 25 degrees celcius is 71.99 dynes/cm as noted in the International Tables of the Surface Tension of Water at https://srd.nist.gov/JPCRD/jpcrd231.pdf and attached. If facilities use the surface tension calculation as presented in the ATCM, their results will be skewed higher than reality, resulting in greater emissions of hexchrome. Thank you. |
| Attachment | www.arb.ca.gov/lists/com-attach/132-chromeatcm2023-UzpdNVciAjRRJQBu.pdf |
| Original File Name | International Tables of the Surface Tension of Water.pdf |
| Date and Time Comment Was Submitted | 2023-04-11 12:13:41 |
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