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Secondary Containment Assessment Page A: <br />Overhead view: <br />r <br />Cross sectional (lateral) view: <br />N <br />Volume calculations: <br />Tank volume (single tank): 3000 gallons. <br />Containment volume: 9'-3" X 24' — 8" X 32" = 609.3 cu. ft. = 4557 gals. <br />Volume/inch = 4557/32 = 142.7 gal/in <br />Excess volume = 4557-3000 = 1557 gals. equivalent to 1557/142.7 = 10.9" <br />24 hr., 25 yr. storm = 2.4 to 2.6" for most of San Joaquin Valley. <br />Therefore, secondary containment volume is adequate. <br />Design of containment area: Secondary containment is provided by a reinforced, lined, <br />concrete enclosure surrounding the tank. The lining material was selected to resist the <br />action of sodium hydroxide in the event of a spill. The containment area was recently <br />repaired and re -lined, and does not have cracks or gaps to allow the escape of spilled <br />material. <br />Site Security: The entire site is fenced. The gate is locked when company personnel are <br />not present. <br />Secondary Containment findings: The secondary containment system is of sufficient <br />capacity and condition for the containment of releases from the 3000 gal caustic tank and <br />ancillary equipment. Initials:" --41114W <br />California Tank Lines, Inc. 3000 gallon Caustic Tank <br />I � <br />Volume calculations: <br />Tank volume (single tank): 3000 gallons. <br />Containment volume: 9'-3" X 24' — 8" X 32" = 609.3 cu. ft. = 4557 gals. <br />Volume/inch = 4557/32 = 142.7 gal/in <br />Excess volume = 4557-3000 = 1557 gals. equivalent to 1557/142.7 = 10.9" <br />24 hr., 25 yr. storm = 2.4 to 2.6" for most of San Joaquin Valley. <br />Therefore, secondary containment volume is adequate. <br />Design of containment area: Secondary containment is provided by a reinforced, lined, <br />concrete enclosure surrounding the tank. The lining material was selected to resist the <br />action of sodium hydroxide in the event of a spill. The containment area was recently <br />repaired and re -lined, and does not have cracks or gaps to allow the escape of spilled <br />material. <br />Site Security: The entire site is fenced. The gate is locked when company personnel are <br />not present. <br />Secondary Containment findings: The secondary containment system is of sufficient <br />capacity and condition for the containment of releases from the 3000 gal caustic tank and <br />ancillary equipment. Initials:" --41114W <br />California Tank Lines, Inc. 3000 gallon Caustic Tank <br />