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Wa I lace Kuhl CORPORATE OFFICE 3251 Beacon Boulevard,Suite 300 6 A S S O c I A T E S I N C West Sacramento,CA 95691 916.372.1434 phone 916.372.2565 fax REPORT OF FINDINGS ROCKLIN OFFICE 500 Menlo Drive,Suite 100 OF Rocklin,CA 95765 916.435.9722 phone SUBSURFACE SOIL SAMPLING AND ANALYSIS 916.435.9822 fax STOCKTON OFFICE 2216 STEWART STREET 3410 West Hammer Lane,Suite F Stockton,CA 95219 Stockton, California 209.234.7722 phone 209.234.7727 fax WKA No. 8214.01 INTRODUCTION This Subsurface Soil Sampling and Analysis Report presents a description of the work conducted at Sahargun Plumbing(herein referred to as the site) located at 2216 Stewart Street in Stockton, California(Figure 1). The purpose of our work was to obtain soil samples beneath the former 5,000-gallon underground storage tank(UST) and former associated fuel dispenser(Figure 2) for analysis of methyl tert butyl ether(MtBE) as required by San Joaquin County Environmental Health Department(SJCEHD). Site Description The site is located on the south side of Stewart Street (2216 Stewart Street), approximately 170 feet east of Sanguinetti Lane in Stockton, California. The site is an active commercial property consisting of an office building and two larger warehouse buildings. Physiographic and Hydrogeologic Setting The subject property is located in the San Joaquin Valley within the southern portion of the Great Valley geomorphic province of California. The shallow subsurface geology in the San Joaquin Valley is a heterogeneous mix of gravel, sand, silt and clay. The topographic surface gently slopes toward the northwest. The site is approximately 23 feet above mean sea level. The nearest surface water bodies are the Stockton Deep Water Channel located approximately 3 miles southwest north of the site. Quaternary fluvial sediments consisting of clay, silt and sand underlie the site. Sediments containing groundwater in