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12 February 2018 AdvancedGeo AGE Project No. 11-1934 Environmental Page 2 of 5 life is estimated at 15 - 20 years [22CCR§ 66265.192(k)(11)]. Additional AST specifications are included as Table 2. 2.1.3. Aboveground Storage Tank (AST) Construction The AST specifications are shown on Figure 3 and is described with features, including: General shape is rectangular; • Orientation is length wise, north to south [22CCR§66265.192 (k)(1)]; • Industry standard for AST construction is A36 steel with the primary tank top, side wall, end wall and bottom measuring approximately 9/64-inch, 3/16-inch, 7/64-inch and 9/64-inch respectively. The secondary tank top, side wall, end wall and bottom measure approximately 7/64-inch in thickness [22CCR§66265.192(k)(2)(A)] as measure by measuring tape; • Though the original blue paint coat appears slightly faded, with minimal areas showing bear steel, the AST is within a precipitation free enclosure. The visible tank surface appeared in fair condition. Information on the original corrosion protection coatings were not available from the manufacturer [22CCR§66265.192(k)(5)]; and • Has not been attached to the ground. 2.1.4. AST Ancillary Equipment The AST ancillary equipment includes the audible and visual overflow mechanical reading gauge. 2.2. OVERFLOW PROTECTION The overflow protection system is comprised of the audible alarm and visual level gauge. The visual level gauge is a mechanical float indicating overflow when the AST is at 90% capacity. The AST is typically not filled past an 85% level. 2.2.1. Piping There are manually actuated pneumatic waste oil 1-inch diameter steel pipes [22CCR §66265.192(k)(2)(C&D)] used to transport fluid to the AST. The pipes are attached to the tank for ease of avoiding spills when the pneumatic system is running and are therefore not considered more than a transport mechanism from the collection point.