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Gil 110 'ur <br />iNC. <br />John W. Johnson <br />Co -President <br />Architect <br />Brian F. Zita <br />Co -President <br />Architect <br />John B. Hicks <br />rce President <br />Cecil R. Spencer <br />Vice President <br />Regional Managers <br />Jesse E. Macias <br />Roy W. Pedro <br />Alan K. Shintabukuro <br />John W. Strobel <br />Blythe R. Wilson <br />Offlces <br />BELLEVUE, WA <br />LA HABRA, CA <br />MARTINEZ, CA <br />PETALUMA, CA <br />SACRAMENTO, CA <br />SCOTTSDALE, AZ <br />VANCOUVER, WA <br />www.rhldesign.cotn <br />ARCHITECTURE EN O IN E E R I N 0 <br />I137 N. McDowell Blvd.. Petaluma, CA 94954 <br />March 14, 2003 <br />John Rowe <br />Diversified Products Mfg. LLC <br />5523 Bagget-Marysvilie Road <br />Oroville, CA 95965 <br />ENVIRONMENTAL SERVICES <br />Telephone: 1707) 765-1660 Facsimile: (707) 765-9908 <br />RE: THIRD PARTY APPROVAL <br />CCR Title 23 Division 3, Chapter 16 Section 2631(d) <br />ISOLATION PRODUCTS <br />Riser Isolation Kits RIK <br />Sump Adapter Kits SAK <br />Flex Jackets FJ & FJZ Series <br />Sensor Mounting Kits SMK <br />Soils Barrier SB -11 <br />Zip Tite DGK <br />I have reviewed the following materials on these products: <br />1. Material specifications, test reports and data sheets. <br />2. Manufacture's Installation Instructions. <br />3. Manufacture's Application Bulletins <br />4. Representative samples of items. <br />5. Manufacture's Master Catalog <br />In my opinion the design of these products as shown in the manufacture's materials are based on <br />sound engineering principles and the materials are compatible with all motor fuels and additives <br />currently being used. <br />RHL�DESIGN <br />GROUP, <br />INC. S <br />NaR <br />JamHy i <br />Senior Civil Engineer <br />Diversified Products Manufacturing Inc. Approvals for Tech Manual Rev 2 Page 4 of 13 <br />