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198942014 <br /> 25 <br /> T E C H N I ^ 0 N s . YE RS STRONG <br /> ENGINEERING SERVICES, INC. <br /> GEOTECHNICAL & ENVIRONMENTAL ENGINEERING CONSTRUCTION TESTING & INSPECTION <br /> November 6 , 2018 TES Project No. 180321 .002 <br /> Mr. Ryan Hunt <br /> Demolition <br /> 355 I l E I <br /> 35500 South Welty Road <br /> Vernalis, California 95385 <br /> RE: Former UST Soil Sampling NOV 0 2018 <br /> 729 North Central Avenue <br /> Tracy, California ENVIRONMENTAL HEALTH <br /> DEPARTMENT <br /> Mr. Hunt: <br /> In accordance with your request and authorization , Technicon Engineering Services, Inc. <br /> (Technicon) has conducted confirmation sampling at a former underground storage tank site at the <br /> above-referenced site. The following sections present a brief description of the site and project, our <br /> scope of services, and the findings of our investigation . <br /> On October 18, 2018, Technicon collected a total of five soil samples from the excavation bottom <br /> at the location of the former 100-gallon kerosene underground storage tank. The soil samples were <br /> all collected at seven feet below ground surface. The soil samples collected during this investigation <br /> were collected by use of a slide hammer into a clean stainless-steel tube. After sampling , the ends <br /> of the sample tube were covered with Teflon® film, capped with plastic end caps, labeled , placed <br /> into a plastic bag and sealed . The samples were then placed in an ice chest cooled with synthetic <br /> ice for delivery to the analytical laboratory for chemical analysis. <br /> The soil samples were chemically analyzed for the presence and concentration of total, STLC, and <br /> TCLP lead by EPA method 6020. Castle Analytical Laboratory in Atwater, California and <br /> McCampbell Analytical Laboratory in Pittsburg , California are state-certified laboratories and <br /> conducted the soil analyses. <br /> CORPORATE OFFICE — 4539 N. Brawley Avenue #108, Fresno, CA 93722 — P 559.276.9311 — F 559.276.9344 <br /> VISALIA OFFICE — 151 S. Dunworth Avenue, Visalia, CA 93292 — P 559.732.0200 — F 559.732.0830 <br /> MERCED OFFICE — 2345 Jetway Drive, Atwater, CA 95301 — P 209.384.9300 — F 209.384.0891 <br /> www.technicon.net <br />