--- type: "Bill" title: "Hazardous materials management: stationary sources." description: "Existing law requires the Secretary for Environmental Protection to implement a unified hazardous waste and hazardous materials management regulatory program. Existing law requires every county to apply to the secretary to be certified to implement the unified program and allows a city or local agency to implement the unified program as a unified program agency. Existing law requires a stationary source, as defined, engaging in activities with certain substances present in more than a threshold quantity to prepare and submit a risk management plan, if the unified program agency makes a determination that there is a significant likelihood of a regulated substances accident risk." jurisdiction: "us/states/ca" legislature: "California Legislature" session: "20172018" identifier: "AB 55" citation: "California AB 55 (20172018)" classification: ["bill"] subjects: ["Hazardous materials management: stationary sources."] status: "enacted" primary_sponsors: ["Thurmond"] version_count: 7 action_count: 25 vote_count: 5 first_action: "2016-12-05" last_action: "2017-10-09" source: "openstates" source_identifier: "ocd-bill/85b269d7-a76b-4e51-b8ef-bdb9ac2710b9" source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180AB55" source_hash: "fe5968370fde3e1e3d895fef0be043be0502777f63afd8f52f3bbb2efc8ff9bd" vintage: "2026-07-01" source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump" retrieved_at: "2026-07-06" confidence: "reported" tags: ["legislation", "bill", "us-ca"] --- # California AB 55 (20172018) — Hazardous materials management: stationary sources. Existing law requires the Secretary for Environmental Protection to implement a unified hazardous waste and hazardous materials management regulatory program. Existing law requires every county to apply to the secretary to be certified to implement the unified program and allows a city or local agency to implement the unified program as a unified program agency. Existing law requires a stationary source, as defined, engaging in activities with certain substances present in more than a threshold quantity to prepare and submit a risk management plan, if the unified program agency makes a determination that there is a significant likelihood of a regulated substances accident risk. ## Version chain The bill's text revisions, in order — the diff chain from filing to enrollment. 1. **12/05/16 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB55&version=20170AB5599INT) 2. **03/14/17 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB55&version=20170AB5598AMD) 3. **06/20/17 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB55&version=20170AB5597AMD) 4. **08/24/17 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB55&version=20170AB5596AMD) 5. **10/09/17 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB55&version=20170AB5594CHP) 6. **AB55** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180AB55) 7. **09/07/17 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB55&version=20170AB5595ENR) ## Votes - Do pass. — **11–4** (pass) · lower - AB 55 THURMOND Assembly Third Reading — **53–19** (pass) · lower - AB 55 THURMOND Concurrence in Senate Amendments — **53–22** (pass) · lower - Do pass, but first be re-referred to the Committee on [Appropriations] — **3–1** (pass) · upper - 3rd Reading AB55 Thurmond By Bradford — **26–12** (pass) · upper ## Sponsors - Thurmond — primary (person) ## Timeline The legislative action history — every referral, reading, and vote. - **2016-12-05** Read first time. To print. `reading-1` - **2016-12-06** From printer. May be heard in committee January 5. - **2017-01-19** Referred to Com. on L. & E. `referral-committee` - **2017-03-14** From committee chair, with author's amendments: Amend, and re-refer to Com. on L. & E. Read second time and amended. `amendment-introduction, amendment-passage, reading-2, reading-1` - **2017-03-15** Re-referred to Com. on L. & E. `referral-committee` - **2017-03-20** In committee: Hearing postponed by committee. - **2017-04-20** From committee: Do pass and re-refer to Com. on APPR. (Ayes 5. Noes 1.) (April 19). Re-referred to Com. on APPR. `committee-passage-favorable, committee-passage, referral-committee` - **2017-05-03** From committee: Do pass. (Ayes 11. Noes 4.) (May 3). `committee-passage-favorable, committee-passage` - **2017-05-04** Read second time. Ordered to third reading. `reading-2, reading-1` - **2017-05-11** Read third time. Passed. Ordered to the Senate. (Ayes 53. Noes 19. Page 1473.) `reading-3, passage, reading-1` - **2017-05-11** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1` - **2017-05-24** Referred to Com. on L. & I.R. `referral-committee` - **2017-06-05** In committee: Hearing postponed by committee. - **2017-06-20** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on L. & I.R. `amendment-passage, referral-committee, reading-2, reading-1, amendment-introduction` - **2017-06-28** From committee: Do pass and re-refer to Com. on APPR. (Ayes 3. Noes 1.) (June 28). Re-referred to Com. on APPR. `committee-passage-favorable, committee-passage, referral-committee` - **2017-07-10** From committee: Be ordered to second reading pursuant to Senate Rule 28.8. `committee-passage, reading-2` - **2017-07-11** Read second time. Ordered to third reading. `reading-2, reading-1` - **2017-08-24** Read third time and amended. Ordered to second reading. `amendment-passage, reading-3, reading-1` - **2017-08-28** Read second time. Ordered to third reading. `reading-2, reading-1` - **2017-08-31** Read third time. Passed. Ordered to the Assembly. (Ayes 26. Noes 12. Page 2346.). `reading-3, passage, reading-1` - **2017-08-31** In Assembly. Concurrence in Senate amendments pending. May be considered on or after September 2 pursuant to Assembly Rule 77. - **2017-09-05** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 53. Noes 22. Page 2911.). `committee-passage-favorable, amendment-passage` - **2017-09-12** Enrolled and presented to the Governor at 2:30 p.m. - **2017-10-09** Approved by the Governor. `executive-signature` - **2017-10-09** Chaptered by Secretary of State - Chapter 608, Statutes of 2017. ## Source OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/85b269d7-a76b-4e51-b8ef-bdb9ac2710b9`. Confidence: reported (aggregated from official California legislature records).