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