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Page 2 <br /> Item 7. The tank will be purged with dry ice, using a <br /> minimum of fifteen ( 15) pounds per 1 ,000 gallon tank <br /> capacity. Gasoline tanks within Stockton city <br /> limits shall be purged with 30# per 1 ,000 gallons of <br /> capacity. Minimum of twenty (20) pounds of dry ice <br /> will be used on tanks with less than 1 ,000 gallons <br /> capacity. Tanks will be identified with high <br /> visibility paint using S.J.L.H.D. tank tracking <br /> numbers. <br /> Item B. Sample(s) will be obtained below tank: invert as per <br /> the attached Sampling Protocol For Routine Tank: <br /> Removals. Grab method, using brass or stain-less <br /> steel tubes will be employed to collect and preserve <br /> samples taken from backhoe bucket 2" below soil <br /> surface. Samples will be obtained approximately 3' <br /> to 4 ' below tank , in native soil . Piping runs in <br /> excess of 20 ' shall be sampled at 2o ' intervals, as <br /> directed by S.J.L.H.D. <br /> NOTE****Copies of all waste manifests, tank: tracking records, <br /> and tank disposal certificates will be provided to <br /> San Joaquin County Environmental Health within thirty <br /> (30) lays of all tank: removals. <br /> r <br />