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<br />LG 162-2
<br />If the results of post -installation testing indicate that the UST system is leaking
<br />liquid or vapor, the owner or operator must take appropriate actions to correct the
<br />leakage, and retest the system using the same approved test method until the
<br />system is no longer leaking liquid or vapor.
<br />7. What requirements apply to a UST installation if installation started prior to
<br />July 1, 2003, but is not completed until after July 1, 2003?
<br />If the tank and associated piping are not placed in the ground prior to July 1,
<br />2003, the UST is subject to the new installation and monitoring requirements of
<br />H&S Code, Section 25290.2. [H&S Code, §25290.2.] As always, the local
<br />agency must have approved the installation plan prior to placement of the tank
<br />and associated piping in the ground.
<br />Please note the following for a UST placed in the ground prior to July 1, 2003,
<br />following approval of the installation plan by the local agency. Such a UST is not
<br />subject to the new installation and monitoring requirements of H&S Code,
<br />Section 25290.2. However, the owner/operator of that UST system is required to
<br />perform a one-time ELD test on or before January 1, 2005, if the UST system is
<br />located within 1,000 feet of a public drinking water well. [H&S Code,
<br />§25290.2(i)(3); H&S Code, §25292.5(x) and (b).]
<br />8. Does a repair or modification to a UST, NOT installed in accordance with
<br />H&S Code, Section 25290.2, subject the UST to the requirements of this
<br />section?
<br />No, not unless the tank is replaced. USTs only become subject to H&S Code,
<br />Section 25290.2 when the tank is replaced. Therefore, for USTs installed prior to
<br />July 1, 2003, replacement of spill containment, sumps, product piping, vapor
<br />recovery piping, or vent piping would not subject the component or the UST
<br />system to the new installation and monitoring requirements of H&S Code,
<br />Section 25290.2.
<br />9. What components of USTs installed on or after July 1, 2003 and prior to
<br />July 1, 2004 are required to be monitored in accordance with H&S Code,
<br />Section 25290.2(d)?
<br />As for all USTs installed since January 1, 1984, USTs installed on or after July 1,
<br />2003 and prior to July 1, 2004 must also be equipped with a continuous
<br />monitoring system "capable of detecting the entry of the hazardous substance
<br />stored in the primary containment into the secondary containment." [H&S Code,
<br />§25290.2(4); CCR, §2630(d).] All sumps, UDCs, and the interstitial spaces of
<br />tanks and piping (including product, vent, vapor recovery, and fill pipe) must have
<br />sensors that are capable of detecting liquid releases from the primary
<br />containment. Components subject to the monitoring requirement of Section
<br />25290.2(4) include, but are not limited to, riser piping and access points on top of
<br />the tank, which provide access to the primary containment of the tank and may
<br />be in contact with vapors of the stored product.
<br />California Environmental Protection Agency
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