****************** Health Database Notes ****************** - Table version is now represented by a five digit number. The first two digits represents the year and the last three digits is the day of year. - Table version dates do not necessarily reflect when specific pollutant records were updated or when the database was officially released because the health database is typically tested before a release. - Columns 56-69 in the health table are not used by HARP2 and are no longer maintained. These columns were once utilized by the HARP version 1 series. **************************** Health Table Version History **************************** **23279 - October 6, 2023** - New acute, 8-hour, and chronic RELs were approved for trimethylbenzenes (25551-13-7); 1,2,3-trimethylbenzene (526-73-8); 1,2,4-trimethylbenzene (95-63-6); and 1,3,5-trimethylbenzene (108-67-8). For more information, please visit http://oehha.ca.gov/air/hot_spots/ **23216 - August 4, 2023** - A revised cancer unit risk and inhalation slope factor for cobalt sulfate heptahydrate and water-soluble cobalt compounds were updated in the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. **23118 - April 28, 2023** - New acute, 8-hour, and chronic RELs for 1-bromopropane (106-94-5) were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. **22343 - December 9, 2022** - New cancer unit risk and inhalation slope factors for 1-bromopropane (106-94-5) were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. - The Bay Area AQMD health table has been updated. Zinc chromate was inadvertently left out of the previous update. **22013 - August 31, 2022** - New acute, 8-hour, and chronic RELs for trivalent chromium (16065-83-1) were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. - The Bay Area AQMD health table has been updated. The update reflects amendments to Rule 2-5: New Source Review of Toxic Air Contaminants (https://www.baaqmd.gov/rules-and-compliance/rules/reg-2-permits?rule_version=2021 Amendments). Please contact Bay Area AQMD for more information. - On March 21, 2022, the final 2022 Emission Inventory Criteria Guidelines rulemaking package was approved by the Office of Administrative Law and filed with the Secretary of State. A number of pollutants were added to Appendix A-1: Substances for Which Emissions Must be Quantified. OEHHA was consulted to determine which existing health values may be applied to these new pollutants. Health values were added for 61 pollutants on August 31, 2022. OEHHA also helped determine the appropriate MWAF if applicable. -- Selenium hexafluoride (7783-79-1): The health values for fluorides were applied to selenium hexafluoride. Selenium also has a set of health values; however, HARP can only apply one set of health values for each pollutant. To account for the additional toxicity of selenium, the MWAF default is 1. **22013 - January 13, 2022** - A minor correction has been made to the health table. The chronic respiratory target organ flag was inadvertently turned on for oleum (8014-95-7).  Because oleum does not have a chronic REL, this caused random characters to appear in the risk results for oleum. **21221 - August 9, 2021** - A correction has been made to the health table. The 8-hour chronic REL for arsenic compounds inorganic (1016) was misapplied to arsenic compounds organic (1017). This has now been fixed. This error does not impact arsenic (7440382). **20276 - October 2, 2020** - New cancer unit risk and inhalation slope factors for cobalt and cobalt compounds (7440-48-4) were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. **20235 - August 22, 2020** - New acute, 8-hour, and chronic RELs for toluene (108-88-3) were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. **19252 - September 9, 2019** - New acute, 8-hour, and chronic RELs for hexamethylene diisocyanate (HDI) (822-06-0) were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. In addition to HDI, OEHHA adopted RELs for HDI polyisocyanates. The Acute, 8-hour, and chronic RELs for HDI polyisocyanates will be added to the consolidated table and HARP when the Air Toxics “Hot Spots” Program Emission Inventory Criteria and Guidelines is updated to include HDI polyisocyanates. **18232 - August 20, 2018** - New cancer unit risk, inhalation slope, and oral slope factors for tertiary-butyl acetate (540-88-5) were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. Although OEHHA has adopted an oral cancer potency value for tertiary butyl acetate, its chemical/biological properties do not fit the multipathway scheme. Therefore, non-inhalation pathway risks calculated from this value will be zero because the transfer factors are set to zero. Please contact OEHHA for more information. **18121 - May 1, 2018** - New Reference Exposure Levels for ethylene glycol mono-n-butyl ether (111-76-2) were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. **17228 - August 16, 2017** - An error was discovered for one of the target organs associated with the acute Reference Exposure Level for styrene. Cardiovascular system should have not been enabled. **17052 - February 21, 2017** - The new Reference Exposure Levels for carbonyl sulfide (463-58-1) were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. - The new unit risk factor for perchloroethylene (127-18-4) was updated in the health database. The unit risk factor is for prioritization calculations and is not used in cancer risk calculations. For more information, please visit http://oehha.ca.gov/air/hot_spots/. **16088 - March 28, 2016** - The new Reference Exposure Levels for toluene diisocyanate isomers and methylene diphenyl diisocyanate were added to the health database. For more information, please visit http://oehha.ca.gov/air/hot_spots/. - 27 pollutants health values have been removed from the health database. OEHHA has determined these values do not apply to the Hot Spots Program. Most of the pollutants are pesticides. The health values have been removed for the following pollutants: PolID Pollutant 78875 1,2-Dichloropropane 122667 1,2-Diphenylhydrazine {Hydrazobenzene} 542756 1,3-Dichloropropene 53963 2-Acetylaminofluorene 92671 4-Aminobiphenyl 61825 Amitrole 57578 beta-Propiolactone 2425061 Captafol 133062 Captan 57749 Chlordane 510156 Chlorobenzilate 107302 Chloromethyl methyl ether (technical grade) 1066 Coke oven emissions 72559 Dichlorodiphenyldichloroethylene {DDE} 62737 Dichlorovos {DDVP} 79447 Dimethyl carbamoyl chloride 151564 Ethyleneimine {Aziridine} 76448 Heptachlor 67721 Hexachloroethane 139139 Nitrilotriacetic acid 1116547 N-Nitrosodiethanolamine 684935 N-Nitroso-N-methylurea 90040 o-Anisidine 95534 o-Toluidine 50555 Reserpine 62566 Thiourea 8001352 Toxaphene **15076 - March 17, 2015** - The new Reference Exposure Levels for benzene could not be updated using the installation package. The health table version has been updated as part of the fix to the installation package. **15071 - March 12, 2015** - It was discovered the new Reference Exposure Levels for benzene were inadvertently left out of the initial release. **15065 - March 6, 2015** - Initial release