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•~ CG R5 SOLUTIONS DELIVERED iota ENHANCED LEAK DETECTION May 1, 2019 Site Location 76 141 E. Harney. Lodi, CA 95240 Subject: Work Plan for IOTA VaporTite Pre and Final ELD Testing Services To Whom It May Concern: CGRS is pleased to present you with this work plan for pre and final enhanced leak detection (ELD)testing services for your project at the above referenced location. CGRS will utilize the iota VaporTite V005 (LG 113) to perform the final ELD post installation test as required by the State of California. This test method has been evaluated by the California State Water Resource Control Board and determined to meet the performance requirements for post installation ELD testing(see LG 162-3 attached). O Pre Testing will be performed on the primary containment portion of the fueling system with the IOTA test method while the tank top and product, vent and vapor piping is exposed, prior to backfilling. Any problems encountered during the pre-testing will be addressed bythe installation contractor and retested by CGRS the testing crew. O Final ELD testing will be performed on all primary fuel containment system components once the fueling system has been completed (everything below grade surface)backfilled, concrete poured, and the system is essentially ready to receive fuel.This will provide the installation contractor,general contractor, design engineer, site owner and operator with third party certification that the system is "vapor tight" before it ever receives fuel. CGRS holds a current California Contractors License with a Hazardous Materials endorsement. All final ELD testing will be performed by a certified IOTA technician holding a current California Tank Tester license. If you have any questions regarding any aspect of this work plan, please don't hesitate to contact me at 1-800288- 2657. Sincerely,