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As discussed, Chevron ill work with Tylor to ensure that detonationcord is strung from <br /> the bottom of the hole up to within a clay lens/bentonite seal to ensure that there is no <br /> pathway for the downward migration of contaminants. To ensure that we are properly <br /> evaluating a safe distance away from our UST's when utilizing blast perforation, Chevron <br /> respectfully requests permission to abandon all %" or greater casing diameter wells <br /> utilizing the blast perforation process. <br /> Attached you will find a copy of Table 1 —Soil Boring and Well Construction Details that <br /> outlines which wells we would like to detonate. <br /> Thank you, <br /> Brian A. Waite, P.G. <br /> Project Manager <br /> Chevron Environmental Management Company <br /> Marketing Business Unit <br /> 6101 Bollinger Canyon Road <br /> San Ramon, CA 94583 <br /> Tel 925-790-6486 <br /> bwaite@chevron.com <br /> <Table I - Soil Boring and Well Construction Details 306415.pdf5 <br /> 3 <br />