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0 0 ' <br />iT!NO AND RESPONSE PLA..._ _.Y. <br />ARM E MEANYFACILI <br />U 1212 <br />ARCO Facility Address <br />Manual tank gauging will be performed In accordance with the details of Section 2645, Articiz. <br />4, Title 23, CCR (copy attached and hereby incorporated). <br />OPERATOR ■••■ <br />IES <br />At a minimum, the OPERATOR will conduct gauging weekly according to the following <br />A Tank liquid level measurements shall be taken at the beginning and ending of a gauging <br />period which shall be at least 36 continuous hours during which no liquid is added to or <br />removed from the tank. Record measurements on gauging log (Exhibit A attached.) <br />B. The underground storage tank shall be secured to prevent inputs or withdrawals during <br />the gauging period. No inputs shall occur within the 12 -hour period preceding the <br />gauging period. <br />a The liquid level measurements shall be based on an average of two consecutive stick <br />readings at both the beginning and ending of the period. <br />D. Measure the level of the product over the full range of the tank!s height to the nearest <br />one-eighth <br />variationE. If the between beginning c r • ending exceeds the weekly or <br />monthly standards (Exhibit B); a second 36 hour test shall be commenced <br />immediatelyand all measurements c • calculations checked for possible errors. <br />