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Hazardous Materials

Underground Storage Tank Ordinance No. 4332
Attachment "A"

General Requirements for Underground Storage Construction Activity & Soil Investigation


One or more of the following options shall be utilized to control erosion and contaminant migration during underground tank closure activities (removal, installation, repair, and modification) and/or any soil investigation activities:

1. Excavated soils shall be placed on a paved area. Two rows of baled hay shall be positioned around the entire base of the spoils pile and be configured to provide filtration of any runoff escaping from the spoils pile.

2. Excavated soils shall be placed on a paved area and a non-woven filter fabric fence shall be placed around the base of the spoils pile. The fencing material shall be appropriately keyed in at the base such that any runoff from the spoils pile shall be adequately filtered.

3. Excavated soils shall be placed on a paved area and covered with visquine to prevent any precipitation from coming into contact with the spoils pile.

4. Excavated soil shall be placed on visquine with the edges of the visquine secured over the bales of hay to create a lined containment pool for temporary storage of the excavated soils.

5. The excavated soils shall be immediately loaded into a dump truck and transported to an approved disposal site or treatment facility.


1. All open excavations shall be adequately fenced.
2. All open excavations shall be shored or sloped to prevent the accidental collapse of the excavation, as applicable, in accordance with Subpart P of 29 CFR Part 1928.
3. There shall be no smoking or other sources of ignition on the job site.
4. A minimum of one 20BC rated fire extinguisher shall be provided on the job site.
5. All employees involved with underground storage tank/hazardous waste activity are subject to the health and safety training requirements specified in 29 CFR 1910.120.


1. All contractors removing or installing underground storage tanks shall have a Hazardous Materials certificate and one of the following California State Licenses:

  • General "A"
  • Limited Specialty C-61 / D 40
  • General Building "B" (Only if a structure is involved)

2. Technical reports/documents/plans which contain engineering, geology, and/or geophysical information must be prepared by or under the direction of individuals licensed by the State of California, pursuant to Sections 6735, 7835, and 7835.1 of the Business and Professions Code, as well as Section 19031 of Title 14 California Code of Regulations. One or more of the following California registrations are included:

  • Registered Geologist
  • Registered Geophysicist
  • Certified Engineering Geologist
  • Registered Civil Engineer
  • Registered Environmental Assessor


Permits for all types of underground storage tank construction (within the Lake Tahoe Basin only) shall not be issued during the period of time from October 16 through April 30 of any year, unless a site specific emergency condition is declared by the Tahoe Regional Planning Agency and the Lahontan Regional Water Quality Control Board.

(Revised 03-01-00)