---
type: "Bill"
title: "Revise petroleum storage tank cleanup definitions"
description: "Revise petroleum storage tank cleanup definitions"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2023"
identifier: "SB 334"
citation: "Montana SB 334 (2023)"
classification: ["bill"]
subjects: ["Environmental Protection", "Oil and Gas (see also: Mining and Minerals; Taxation--Oil and Gas)", "Revenue", "State"]
status: "enacted"
primary_sponsors: ["John Esp"]
version_count: 11
action_count: 54
vote_count: 10
first_action: "2022-12-09T16:07:05+00:00"
last_action: "2023-05-22T19:59:26+00:00"
source: "openstates"
source_identifier: "ocd-bill/50db080b-b443-4902-83b9-224e0af0628e"
source_url: "https://bills.legmt.gov/#/bill/20231/LC3568"
source_hash: "3cd864c161cc5833e54b21af929976861024d57e02350de04b07e9df19e4c7ad"
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-mt"]
---

# Montana SB 334 (2023) — Revise petroleum storage tank cleanup definitions

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **SB0334.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7446)
2. **SB0334.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7447)
3. **SB0334.002.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7442)
4. **SB0334.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7443)
5. **SB0334.002.002_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7444)
6. **SB0334.002.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7445)
7. **SB0334_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7398)
8. **SB0334_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7399)
9. **SB0334_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7400)
10. **SB0334_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7397)
11. **SB334.1.1-sponsor-drafts.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7441)

## Votes

- (S) Committee Executive Action--Bill Passed as Amended — **18–1** (pass) · upper
- (H) 2nd Reading Motion to Amend Carried — **98–2** (pass) · lower
- (H) Committee Executive Action--Bill Concurred — **15–0** (pass) · lower
- (S) 2nd Reading House Amendments Concurred — **50–0** (pass) · upper
- (S) 3rd Reading Passed as Amended by House — **49–0** (pass) · upper
- (S) 2nd Reading Passed — **48–2** (pass) · upper
- (S) 3rd Reading Passed — **50–0** (pass) · upper
- (H) 3rd Reading Concurred — **95–4** (pass) · lower
- (H) 2nd Reading Concurred as Amended — **97–3** (pass) · lower
- (S) Committee Executive Action--Bill Passed — **6–3** (pass) · upper

## Sponsors

- John Esp — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2023-05-22T19:59:26+00:00** Chapter Number Assigned `became-law`
- **2023-05-22T15:20:00+00:00** (S) Signed by Governor `executive-signature`
- **2023-05-12T15:30:00+00:00** (S) Transmitted to Governor `executive-receipt`
- **2023-05-11T22:00:00+00:00** (H) Signed by Speaker `passage`
- **2023-05-04T17:00:00+00:00** (S) Signed by President `passage`
- **2023-05-03T19:50:20+00:00** (C) Printed - Enrolled Version Available `enrolled`
- **2023-05-03T19:50:19+00:00** (S) Returned from Enrolling
- **2023-05-02T18:36:55+00:00** (S) Sent to Enrolling
- **2023-05-01T19:25:00+00:00** (S) 3rd Reading Passed as Amended by House `passage, passage, reading-3, reading-3`
- **2023-05-01T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2023-04-29T15:55:00+00:00** (S) 2nd Reading House Amendments Concurred `amendment-amendment, amendment-passage, reading-2, reading-2`
- **2023-04-29T15:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-04-27T12:57:31+00:00** (H) Returned to Senate with Amendments
- **2023-04-26T19:46:00+00:00** (H) 3rd Reading Concurred `passage, reading-3`
- **2023-04-26T19:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2023-04-21T21:37:11+00:00** (C) Printed - New Version Available
- **2023-04-21T19:40:01+00:00** (H) 2nd Reading Concurred as Amended `reading-2, reading-2`
- **2023-04-21T19:40:00+00:00** (H) 2nd Reading Motion to Amend Carried `reading-2`
- **2023-04-21T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2023-04-18T19:12:00+00:00** (H) Committee Report--Bill Concurred
- **2023-04-18T00:45:00+00:00** (H) Committee Executive Action--Bill Concurred
- **2023-04-12T21:00:00+00:00** (H) Hearing
- **2023-04-05T20:10:49+00:00** (H) First Reading `reading-1`
- **2023-04-05T19:22:19+00:00** (H) Referred to Committee `referral-committee`
- **2023-04-04T22:27:44+00:00** (S) Transmitted to House
- **2023-04-04T19:53:00+00:00** (S) 3rd Reading Passed `passage, reading-3`
- **2023-04-03T22:24:00+00:00** (S) 2nd Reading Passed `reading-2, reading-2`
- **2023-03-31T19:38:00+00:00** (S) Committee Report--Bill Passed as Amended `committee-passage`
- **2023-03-31T18:42:37+00:00** (C) Printed - New Version Available
- **2023-03-31T14:00:00+00:00** (S) Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2023-03-30T23:09:48+00:00** (C) Amendments Available
- **2023-03-27T16:00:00+00:00** (S) Hearing
- **2023-02-28T22:36:00+00:00** (S) Rereferred to Committee `referral-committee, referral-committee`
- **2023-02-28T20:21:00+00:00** (S) Committee Report--Bill Passed `committee-passage`
- **2023-02-27T22:00:00+00:00** (S) Committee Executive Action--Bill Passed `committee-passage`
- **2023-02-24T21:00:23+00:00** (S) Hearing
- **2023-02-18T20:09:07+00:00** (S) Hearing Canceled
- **2023-02-15T19:31:56+00:00** (S) Referred to Committee `referral-committee`
- **2023-02-14T20:36:00+00:00** (S) First Reading `reading-1`
- **2023-02-14T18:08:05+00:00** (C) Introduced Bill Text Available Electronically
- **2023-02-14T00:19:42+00:00** (S) Introduced
- **2023-02-14T00:14:41+00:00** (C) Draft Delivered to Requester
- **2023-02-10T22:42:41+00:00** (C) Draft Ready for Delivery
- **2023-02-10T15:10:52+00:00** (C) Executive Director Final Review
- **2023-02-10T15:10:47+00:00** (C) Draft Ready for Delivery
- **2023-02-10T14:20:38+00:00** (C) Draft in Assembly
- **2023-02-10T13:22:27+00:00** (C) Executive Director Review
- **2023-02-09T18:39:08+00:00** (C) Bill Draft Text Available Electronically
- **2023-02-09T18:39:07+00:00** (C) Draft in Final Drafter Review
- **2023-02-09T16:19:26+00:00** (C) Draft in Input/Proofing
- **2023-02-08T16:30:25+00:00** (C) Draft to Drafter - Edit Review
- **2023-02-03T21:26:40+00:00** (C) Draft in Edit
- **2023-02-03T18:46:36+00:00** (C) Draft in Legal Review
- **2022-12-09T16:07:05+00:00** (C) Draft Request Received `receipt`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/50db080b-b443-4902-83b9-224e0af0628e`. Confidence: reported (aggregated from official Montana legislature records).