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20 September 2019 AdvancedCzeo <br /> AGE Proposal No. 16-3734 Environmental <br /> Page 2 of 2 M..MM <br /> The 250-gallon used oil AST is single walled. A concrete pad with an internalized slope <br /> has been constructed around the waste oil ASTs. The 350-gallon new motor oil AST is <br /> single walled, located in the truck maintenance building on a concrete pad with an <br /> Internalized slope. The Facility is unattended for a maximum cf 24 hours (Sunday <br /> overnight). Any spill into the berm secondary containment area would be detected before <br /> it could escape. The surface of the concrete floor, the inside and outside of the walls, and <br /> the interface of the floor and walls, are visually inspected during the monthly Facility <br /> inspection to detect any crack, signs of heaving or settlement, or other structural damage <br /> that could affect the ability of the berm to contain oil. Any damage is promptly corrected <br /> to prevent migration of oil into the ground, or out of the berm. <br /> Additionally, the Facility uses 55-gallon drums of motor oil, hydraulic oil,waste oil orwaste <br /> filters which are stored over secondary containment spill pallets largeenough to contain <br /> 110% of the largest container. <br /> CONCLUSIONS <br /> AGE has determined that the current use of secondary containment of 55-gallon drums <br /> are sufficient and has been approved by the Professional Engineer(PE). This letter report <br /> will be included into the SPCCP binder and kept on site for the life of the plan- Due to the <br /> SPCCP being due for an update in December 2021, this amendment will be corrected <br /> within the new plan in 2021. <br /> If you have any questions or require any further information, please contact our office at <br /> (800) 511-9300. <br /> Sincerely, <br /> Advanced 'ronmental, Inc. <br /> REJne M. T th ROFESS/p <br /> Staff Geologist p <br /> �,4,pJP�I,VAND,q: Y <br /> 3 YZ <br /> C m <br /> 9!20/19 62560 a <br /> illiam VanDer all Date <br /> California Professional Engineer License No. C62560 �I CrwL. <br /> Expires 12/3112019 �OF CAL�F� <br />