Underground Storage Tanks (UST) Guidelines

Installation, Modification, and/or Repair

The plan review of new installations, upgrades, modifications, or repairs shall include, but is not limited to the following items:

STATE AND LOCAL AGENCY REQUIREMENTS

  1. All requirements specified in Title 23, Division 3, Chapter 16 of the California Code of Regulations and Chapter 6.7 of the California Health & Safety Code must be met. Please reference specific local requirements listed in El Dorado County Code, Chapter 8.40 and Attachments A - D.
  2. Submit a complete application to install, upgrade, modify or repair a UST system along with the applicable fee. See the El Dorado County Fee Schedule for details. A valid permit must be obtained from this agency, prior to commencing any site work.
  3. Demonstrate approval has been obtained from the following agencies, as applicable:
    • Local Building Department
    • Local Fire Department or District
    • El Dorado County Air Pollution Control District
    • Tahoe Regional Planning Agency
    • Regional Water Quality Control District (Central Valley or Lahontan)

GENERAL PLAN INFORMATION

  1. Submit two complete sets of plans with all required information.
  2. Provide a plot plan showing proposed location of UST system equipment.
  3. Indicate the location of all underground utilities or that the site shall have all utility locations identified, prior to any work on site.
  4. Indicate all UST system equipment shall be installed and tested per manufacturer specifications.

TANK INFORMATION

  1. Provide name of the tank manufacturer and a cut sheet with all tank specifications listed.
  2. Indicate the capacity of the tank(s).
  3. Indicate that a Bill of Lading shall be provided on the date of tank delivery and installation.
  4. Indicate what tests (as applicable) shall be completed prior to placing the UST system into operation. (Holiday or Pneumatic or Vacuum)
  5. Indicate the location of required strike plates or protective devices to be installed under all accessible primary containment openings.
  6. Indicate the name(s) of the manufacturer(s) for the overfill protection devices to be installed, include the level at which the fill valve and the ball float valve shall be set for activation upon overfill (90-95%).
  7. Indicate the type of backfill material to be used.
  8. Describe the corrosion protection method, as applicable, for the UST system.

PIPING INFORMATION

  1. Provide the name of the piping manufacturer and the model number; include a cut sheet with all the specifications listed.
  2. Indicate the type of piping system - remote fill, gravity, pressure or suction.
  3. Provide the name of the manufacturer for the overspill container and the model number; include cut sheet with all the specifications listed.
  4. Provide the name of the dispenser pan manufacturer and the model number; include a cut sheet with all the specifications listed.
  5. Provide the name of the manufacturer and model number for the sumps to be attached to the tank collars; include a cut sheet with all the specifications listed.
  6. Provide a detailed diagram of all piping - product line(s), vent line(s), turbine/fill/ATG sump(s) and dispenser pan(s).

LEAK DETECTION/CONTINUOUS MONITORING SYSTEM

  1.  Provide the name of the manufacturer and the model number for the continuous monitoring system; include a cut sheet with all specifications listed.  
  2.  Provide the model number of each sensor to be used with the monitoring console.  
  3. List all the functions the continuous monitoring system shall be programmed to perform:
    • Monitoring of the annular space.
    • Monitoring of the turbine/fill/ATG sump(s).
    • Monitoring of the fuel level - Automatic Tank Gauge (ATG)
    • Electronic Overfill Alarm (with exterior audible/visual alarm for delivery driver).
    • Monitoring of the dispenser containment pan(s) - electronic or mechanical.  
  4. Specify which sump sensors shall be programmed for positive shut down of the turbine upon detection of liquid (i.e. turbine, fill, ATG sump(s) and/or annular space      sensors).
  5. Indicate the type of automatic line leak detector (electronic or mechanical) to be installed in-line for the pressurized piping system(s); include the manufacturer and model number.  

ADDITIONAL INFORMATION

Indicate that the following requirements are understood and shall be met, prior to the operation of the UST system(s):

  1. All site inspections shall be scheduled a minimum of three working days in advance of requested date.
  2.  UST systems shall be inspected by the El Dorado County Environmental Management Department as follows:
    • Tank Install
    • Primary Piping - Pneumatic Test for 30 Minutes
    • Secondary Piping - Pneumatic Test for 30 Minutes & Hydrostatic Tightness Test for Sumps & Dispenser Pans
    • Approval to Backfill & Concrete
    • UST System Test - Tank, Piping, Continuous Monitoring System, and Leak Detector
    • Final Inspection
  3. All required documentation shall be submitted at the final inspection to receive approval to operate the UST system(s):
    • State Form A, B, and C
    • Unauthorized Release Response Plan
    • Monitoring & UST System Plot Plan
    • Certificate of Financial Responsibility
    • Payment of all applicable UST annual operating fees within 30 days of the final inspection.

Temporary Closure/Removal/Closure in Place

This guide offers a general overview of applicable requirements. Please refer to El Dorado County Ordinance 4332 and Attachment A-D available at Solid Waste Home Page for further instructions. Additional requirements for UST closure include applicable sections of Title 23, Division 3, Chapter 16 of the California Code of Regulations and Chapter 6.7 of the California Health & Safety Code.

A valid permit must be issued by this agency, prior to commencing closure activities. You must schedule an appointment with the Hazardous Materials Division (HMD) a minimum of three days prior to the commencement of temporary closure, removal or abandonment activities.

TEMPORARY CLOSURE

Temporary closure may be permitted for a period of up to one year. By the end of that period, the UST system must either be placed back into operation or removed. To apply for a temporary closure permit:

  1. Submit a complete UST closure application, work plan and applicable fee(s).
  2. Submit complete State Forms A and B.
  3. Submit documentation indicating the contents of the UST system has been disposed of at an approved location.
  4. Submit documentation indicating the UST system has been triple rinsed (inerted) and the rinseate has been disposed of at an approved location.
  5. Properly vent and secure a locking cap on the tank access.

Temporary closure measures must be maintained and inspected by the designated operator every three months. Written documentation of these inspections must be maintained.

CLOSURE BY REMOVAL

  1. Submit a complete UST closure application, work plan and applicable fee(s).
  2. Submit complete State Forms A and B.
  3. The work plan must include the following:
    • Site plot plan with location of UST system(s) and all utilities.
    • Indicate if tank will be triple rinsed or transported as hazardous waste. If tank will be triple rinsed, indicate rinseate destination.
    • Destination of the tank & piping
    • Statement indicating that a certificate of tank destruction will be provided to HMD.
    • Sampling plan with number and location of soil and/or ground water samples collected upon removal of UST system (tank, piping, and stockpiles areas). Indicate the method to be used to obtain the samples.
    • Soil and groundwater sample analytical methods.
    • Name of State of California certified laboratory to be used .
    • Description of how all excavated soil shall stockpiled pending receipt of analytical data.
    • Name and location of contaminated soils disposal site.
  4. Demonstrate that approval has been obtained from the following agencies, as applicable:
    • Local Fire Department or District
    • Tahoe Regional Planning Agency (Tahoe Basin Only)
    • Lahontan Regional Water Quality Control Board (Tahoe Basin Only)
  5. Copies of analytical results must be submitted to EMD within five days of receipt.
  6. Documentation of proper disposal of all contaminated soil, rinseate, discarded product and tank certificate of destruction shall be provided to EMD within five days of receipt.
  7. If tank is to be reused, provide documentation of:
    • name of new owner and new operator of underground tank,
    • location of intended use, and
    • nature of intended use.

CLOSURE IN PLACE

Removal is the preferred closure method. Closure in place will only be permitted in rare circumstances related to significant potential impact on adjacent structures and documented absence of soil and/or groundwater contamination. If an owner or operator knowingly installs a tank in close proximity to a structure or knowingly installs a structure in closure proximity to a tank, closure in place will not be permitted.

  1. Submit documentation from a registered structural engineer that states the integrity of the structure above or adjacent to the tank shall be compromised by removal of the UST system and a description of required mitigation measures should the request for closure in place be denied.
  2. Submit complete State Forms A and B.
  3. Submit a work plan for subsurface soil and water investigation to demonstrate an unauthorized release has not occurred. The work plan shall include, but not be limited to the following:
    • Site plot plan including location of UST system(s) and all utilities.
    • Sampling plan including number and location of soil and ground water samples to be collected from beneath or adjacent to the UST system. Indicate method to be used to obtain samples.
    • Analytical methods for and ground water samples.
    • Name and location of State of California certified laboratory to be used.
    • Contents disposal destination.
    • Triple rinse method and rinseate disposal destination.
  4. Schedule an appointment with this office a minimum of three days in advance to witness the sampling activities.
  5. Contents disposal documentation, rinseate disposal documentation and analytical results must be submitted to EMD within five days of receipt. 

 

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