Reporting a release:
A suspected or confirmed release must be reported within 24 hours.
UST Indiana Laws and Rules applicable under Indiana Administrative Code (IAC) 329
http://www.in.gov/legislative/iac/T03290/A00090.PDF
Regulations Pertaining to Underground Storage tanks (Current as of April14, 2014) are as indicated in the links below
40 Code of Federal Regulation (CFR) Part 280:
http://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&tpl=/ecfrbrowse/Title40/40cfr280_main_02.tpl
40 CFR Part 281:
http://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&tpl=/ecfrbrowse/Title40/40cfr281_main_02.tpl
40 CFR Part 282:
http://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&tpl=/ecfrbrowse/Title40/40cfr282_main_02.tpl
40 CFR Part 302:
http://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&sid=34d44d246792813ef09656481ce8f699&rgn=div8&view=text&node=40:29.0.1.1.2.0.1.4&idno=40