Petaluma Municipal Code Ch. 39 Processing and Extraction Facilities

The extraction equipment and extraction processes utilizing hydrocarbon solvents

shall be located in a room or area dedicated to extraction. For other than CO2 and non-hazardous

extraction process, the extraction equipment and process shall be separated from other occupancies

and uses with Zre barriers where required by CBC Table 508.4.

Section 3903.5 is amended to read:

Extraction and post oil processing operations using

[ammable liquids or combustible liquids heated above their [ashpoint, including dispensing of

[ammable liquids between containers, shall be performed in one of the following locations:

1. An exhausted chemical fume hood installed in accordance with the California Building Code and

California Mechanical Code.

2. A room or approved exhausted enclosure with an approved exhaust system installed in accordance

with the California Mechanical Code.

Note: Electrical equipment used within the chemical fume hood shall be rated for use in [ammable

atmospheres. Heating of [ammable or combustible liquids over an open [ame is prohibited.

Exception 1: The use of a heating element not rated for [ammable atmospheres, where documentation

from the manufacturer or approved testing laboratory indicates the element is rated for heating of

[ammable liquids.

Exception 2: Unheated processes at atmospheric pressure using less than 16 oz. (473 ml) of [ammable

liquids shall not be required to comply with 3903.5(1) or 3903.5(2).

Section 3903.5.1 is added to read as follows:

3903.5.1 Electrical components. All electrical components within the chemical fume hood, room, or

exhausted enclosure shall be approved permanent wiring, interlocked such that the exhaust system shall

be in operation for lighting and components to be used.

Section 3903.5.2 is added to read as follows:

3903.5.2 Refrigerators, Freezers, and Cooling Equipment. Refrigerators, freezers, and other cooling

equipment used to store or cool [ammable liquids shall be listed for the storage of [ammable/

combustible liquids or shall be listed for Class I, Division 1 locations, as described in the California

Electrical Code.

Section 3903.6 is amended to read as follows:

atmosphere except where released in accordance with Section 7.3 of NFPA 58. LPG liquid piping systems

shall be in compliance with CFC Chapter 61.

Section 3903.6.1 is added to read as follows:

3903.6.1 Exhaust. An approved exhaust system shall be provided for LPG extractions.

Section 3903.6.1.1 is added to read as follows:

3903.6.1.1 Installation. The exhaust systems shall be installed and maintained in accordance with the

California Mechanical Code.

Section 3903.6.1.2 is added to read as follows:

3903.6.1.2 Processes. All LPG extraction operations, including processes for o]-gassing spent plant

material and oil retrieval, shall be conducted within a chemical fume hood, enclosure, or room provided

with an approved exhaust system in compliance with the California Mechanical Code.

Section 3903.6.2.1 is added to read as follows:

3903.6.2.1 Electrical bonding and grounding. All conductive equipment and conductive objects within

the exhaust room shall be bonded and grounded in accordance with California Electrical Code.

Section 3903.6.2.2 is added to read as follows:

3903.6.2.2 ClassiKed areas. The area within a hood or enclosure used for LPG extractions shall be

classiZed as a Class 1, Division 1 hazardous location in accordance with California Electrical Code. Areas

adjacent to Class 1, Division 1 locations shall be classiZed in accordance with California Electrical Code.

Section 3903.6.2.3 is added to read as follows:

3903.6.2.3 Interlocks. All electrical components within the extraction room shall be interlocked with the

hazardous exhaust system such that room lighting and other extraction room electrical equipment will

only operate when the exhaust system is in operation.

Section 3903.6.2.4 is added to read as follows:

3903.6.2.4 Emergency Power. An automatic emergency power system shall be provided for the

following items, when installed:

1. Extraction room lighting

2. Extraction room ventilation system

3. Solvent gas detection system

Exception: Except where required by other Sections of this Code, extraction room ventilation systems in

existing facilities are not required to have a secondary power source, such as emergency or standby

power until such time that the medium of extraction or solvent is changed.

Section 3903.6.2.5 is added to read as follows:

3903.6.2.5 Gas detection systems. Gas detection systems shall be provided with constant non-

interlocked power.

Section 3903.7 is amended to read as follows:

For extraction rooms using hazardous materials, each room shall be provided

with at least one exit access door complying with the following:

1. The door shall swing in the direction of egress travel.

2. The door shall be provided with a self-closing or automatic closing device.

3. Where provided with a latch, the door shall be equipped with panic or Zre exit hardware.

4. The exit access travel distance cannot be increased as allowed in CFC Section 1017.2.2 for extraction/

cultivation facilities.

Section 3903.8 is added to read as follows:

Carbon Dioxide extraction shall comply with sections 3903.8.1,

3903.8.2, and 3903.8.3

Section 3903.8.1 is added to read as follows:

3903.8.1 Storage and handling. All CO2 compressed gas cylinders shall be secured in an approved

method to prevent falling.

Section 3903.8.2 is added to read as follows:

3903.8.2 CO2 gas detection. An approved, listed CO2 detection system complying with CFC Section

5307.4 shall be installed in the CO2 extraction room. Auto-calibrating and self-zeroing devices or

detectors shall be prohibited.

Section 3903.8.3 is added to read as follows:

3903.8.3 CO2 discharge. The extraction equipment pressure relief devices and blow-o] valves shall be

piped to the exterior of the building.

Section 3903.9 is added to read as follows:

3903.9. Signage. The NFPA 704 hazard rating diamond sign, minimum 10” in size, and no smoking signs

shall be posted on the exterior of the extraction room door.

Section 3903.9.1 is added to read as follows:

3903.9.1 Safety data sheets. All applicable safety data sheets (SDS) shall be posted in the approved

location.

Section 3903.9.2 is added to read as follows:

3903.9.2 Warning signage. Applicable hazard warning signage shall be posted throughout the facility as

applicable for emergency equipment.

Section 3904.2.2.3 is amended to read as follows:

3904.2.2.3 Site inspection. Prior to the operation of the extraction equipment, the engineer of record or

approved professional, as approved in Section 3904.2, shall inspect the site of the extraction process

once equipment has been installed for compliance with the technical report and the building analysis.

The engineer of record or approved professional shall provide a report of Zndings and observations to

the Zre code o\cial prior to the approval of the extraction process. The Zeld inspection report authored

by the engineer of record shall include the serial number of the equipment installed and conZrmation

that it is the same model and type of equipment identiZed in the technical report.

Section 3904.5 is added to read as follows:

Where the medium of extraction or solvent is changed from the

material indicated in the technical report or as required by the manufacturer, the technical report shall

be revised at the cost of the facility owner and submitted for review and approval by the Zre code o\cial

prior to the use of the equipment with the new medium or solvent.