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SOW for UST Lin ing CGRS SOLUTIONS DELIVERED April 4, 2025 Amba Rai Thornton Valero 860E Thorton Rd. Stoukton. CA 95209 Amba Rai Email: arnbsra76 vahoa,com Call: 408-593-31 9a Re: SOW for UST Lining Scope of Work Prior to the start of the proiecII the USTs shall be emigty of fuel. or as low as passible fleas then 1-inch from the bottom I. The tank shall be made available prior to the start of the project CGRS shall provide all equipment, materials. and labor to the following cUtlines the scope of work.- 1. Prepare health and safety and work plans, procure materials, schedule tasks, and mob to site_ 2. The Client shalt Dump out and remove all but 14nch of fuel at the tanks bottom, CGRS estimates no more than 100-gallons of product in the UST prior to our arriving on site. This fuel shall be drummed up by CORS for the client to dispose of. The tank shall be available when C GR S arrives onsite, 3. GGRS will excavate a$" X 6' hole and excavate down to the tank top. 4. CGRS will de-gas the LEST with a forced air venturi dispersing vapors. Once the LEL {lower explosive limit) is down to zero (0)CG IRS shall prepare the confined space permit and enler each lank for cleanow. CGRS will use a 4-gas air rrronitor to observe the tanks' conditiall5 every time a confined space certifred employee is going to enter the tank and every E0 minutes as well_ CGRS crew members retain oerfifications in 40 Harwoper, Confined Space, Ultrasonic Testing, and I C. A three to four-man crew on- site at all tines because we are trained a+id have the proper equip mant to complete a safe retrieval of a crew member if the confined space entrant was to sustain an injury or become unconscious_ Any rernining petroleum waste shall be drummed for disposal by owner_ 6. Tanks small be inspected by a certified level 2 A M P P coatings inspector and certified AP1-663 inspector. The tanks conditions report indicating fit for service shall be prepared for the tank. E_ The tank will be sandblasted to a near-white metal profile(NACE 21SSPC 5P-10)_ All sandblast media will be removed from the tank 7. The tank will be limed using Enviroline 125u high-build epoxy. Once dry (1 -24 hours)the newly installed liner will be inspected for holidays and dry-flm thickness. 8. CGRS shall close up the tank using a 24' cover lid, back fill and pour new concrete. C GRS WiII perform a vacuum test of the annular space Holding -1 Q.0inHg for one hour. GG RS will coordinate all inspections with CUPA and notify the owner when the tank carp be put back into service. All worst performed will compty with Title 23 sectlon 266.E&AP11631 "Interior lining and Periodic Inspection of Underground Storage Tanks", 8,00