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letter is sent to Elf requesting this extension thirty d rior to the end of the <br />calendar year. A one time, one year extension may be granted by EHD upon receipt of <br />this letter. <br />Note: The contractor's EHD approved plans of the UST installation shall be retained at the job <br />site and must be shown to the EHD inspector upon request. In addition, the applicable <br />fire department shall approve the UST installation prior to commencement of work. <br />All appointments for inspections must be made at least 48 hours in advance. Below are <br />the minimum required inspections: <br />a. Before installation, the tank shall be tested for tightness at the installation site in <br />accordance with the manufacturer's written guidelines. If there are no guidelines, the <br />primary and secondary containment shall be tested for tightness with air pressure <br />between 3 and 5 pounds per square inch. In lieu of a pressure test, a vacuum <br />expressed in inches of mercury in the interstitial space of the secondary containment, is <br />acceptable. The pressure (or vacuum in the interstitial space) shall be maintained for a <br />minimum of 30 minutes. <br />b. All new primary piping and secondary containment systems shall be tested for tightness <br />after installation in accordance with manufacturer's guidelines. Primary pressurized <br />piping shall be hydrostatically tested at 150 percent of design operating pressure or <br />pneumatically at 110 percent of design operating pressure. If the calculated test <br />pressure for pressurized piping is less than 40 psi, 40 psi shall be used as the test <br />pressure. The pressure shall be maintained for a minimum of 30 minutes and all joints <br />shall be soap tested. If there are no manufacturer's guidelines, secondary containment <br />systems shall be tested using an applicable method specified in an industry code or <br />engineering standard. <br />C. All lines other than pressure piping shall be pressure tested at not less than 3 p.s.i. and <br />not more than 5 p.s.i. for a minimum of 30 minutes and soap tested while under <br />pressure. <br />d. Containment sumps shall pass a 24 hour hydrostatic leak test. <br />e. The spill container shall be shown to be capable of draining liquid back into the fuel <br />tanks. <br />f. The monitoring system shall pass a functional test. The functional test shall consist of <br />the activation of the alarm via all monitoring probes/sensors. <br />g. Final inspection and approval to operate will be granted after the above requirements <br />are satisfied and a hard copy of the tank integrity test [as required by Section 2635 (a) <br />(5)] is submitted to the inspector at the site. <br />If you need further assistance, or wish to schedule an appointment to discuss the plan <br />review or field inspection, please contact our Underground Storage Tank Staff at (209) <br />468-3427. <br />EH23 008 (REVISED 3/18/02) <br />3 <br />