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0 <br />Oil Spill Prevention Control Et Countermeasure (SPCC) <br />SLIDE 18 <br />SECONDARY CONTAINMENT - <br />Double Walled Tanks <br />Review the SPCC Plan to <br />determine if there are any <br />double -walled tanks at your <br />facility. Be prepared to point <br />out the location of double -walled <br />tanks on the site map during the <br />training session. <br />Include in the notes box below <br />any site specific BMPs that are <br />not already included in the <br />"What to Say and Do" section. <br />Notes: <br />LEADER GUIDE <br />A double walled tank is essentially a tank within a <br />tank. The space between the tanks is called the <br />interstitial space and is routinely inspected to <br />make sure the inner tank has not leaked. They <br />are increasingly becoming the preferred method <br />of providing secondary containment for tanks. <br />Reference the site map and point out to the <br />participants where double walled tanks are <br />used at the facility. <br />All of our double -walled tanks <br />Exteriors should be free of rust <br />The opening to access the interstitial space <br />should be closed <br />The Interstitial Space opening should be <br />marked with "Do Not Fill" to prevent accidental <br />filling <br />Talk about the site specific double walled <br />tanks BMPS included in the notes box below. <br />OCT 07 2015 <br />E"VIRONMErW <br />ht ALTH DERIPTnns <br />SPCC -version 1.2 P age 116 <br />