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CGRS <br /> SOLUTIONS DELIrF.Q <br /> APR 0 3 M. 11 <br /> lutcA <br /> March 27, 2020 LNV1 'a0NlV1 JN I Al.. HEAI- I V ENHANCED LEAK DETECTION <br /> 7-Eleven #38877 <br /> 1515 E. Main St. <br /> Stockton, CA <br /> Subject: Work Plan for IOTA v0050 and iotaVisionTM Pre and Final ELD Testing Services <br /> To Whom It May Concern: '.. <br /> CGRS is pleased to present you with this work plan for pre and final enhanced leak detection ( ELD) testing services for your <br /> project at the above referenced location . CGRS will utilize the iota VanorTite V005 and iotaVision'" LOOS ( LG 113) to <br /> perform the final ELD post installation test as required by the State of California. These test methods have been evaluated <br /> by the California State Water Resource Control Board and determined to meet the performance requirements for post <br /> installation ELD testing (see LG 162-3 attached). <br /> O Pre Testing will be performed on the primary containment portion of the fueling system with the IOTA test method <br /> while the tank top and product, vent and vapor piping is exposed, prior to backfilling. Any problems encountered '.. <br /> during the pre-testing will be addressed by the installation contractor and retested by CGRS the testing crew. '.. <br /> O Final ELD testing will be performed on all primary fuel containment system components once the fueling system <br /> has been completed (everything below grade surface) backfilled, concrete poured, and the system is essentially <br /> ready to receive fuel . This will provide the installation contractor, general contractor, design engineer, site owner <br /> and operator with third party certification that the system is "vapor tight" before it ever receives fuel . '.. <br /> O Final testing with iotaVision"" will be performed on all brine filled underground storage tanks and their <br /> compartments thus ensuring that brine is not observed in the primary containment. <br /> CGRS holds a current California Contractors License with a Hazardous Materials endorsement. All final ELD testing will be <br /> performed by a certified IOTA technician holding a current California Tank Tester license. <br /> If you have any questions regarding any aspect of this work plan, please don't hesitate to contact me at 1-800-288-2657. <br /> Sincerely, <br /> Chris Murphy <br /> Director of CA Operations <br /> CGRS, Inc. <br /> e <br />