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CGRS <br /> SOLUTIONS DELIVERED <br /> May 09 , 2022 iota <br /> ENHANCED LEAK DETECTION <br /> Grappa Market Shell <br /> 710 N . Jacktone Rd , <br /> Ripon , CA 95366 <br /> Subject : Work Plan for IOTA v0050 and iotaVision'" 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 VaporTite V005 and iotaVision'"' L005 ( 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 iotaVisionTm 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 /> www,cgrs .com 1301 Academy Ct. <br /> : 00 80524 <br />