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■ Geotechnical <br /> m <br /> Ic <br /> cc <br /> ' November 5, 1991 <br /> San Joaquin County <br /> Public Health Services <br /> ' Environmental Health Division <br /> Attention: Mike Infurna <br /> 445 N San Joaquin Street <br /> Stockton, California 95201 <br /> ' WORKPLAN <br /> GROUNDWATER SAMPLING AND ANALYSIS <br /> STONEBRIDGE INDUSTRIAL PARK, LOT 8 <br /> 1050 Grantline Road <br /> Tracy, California <br /> ' Job No. 168-011 .01 <br /> INTRODUCTION <br /> We have been authorized by the property owner, Mark III Engineering Contractors, to <br /> ' perform groundwater sampling and chemical analysis at the subject site. The purpose <br /> of the work is to determine if extremely low level contaminants found in the <br /> groundwater southerly and westerly of the site by others are detectable beneath the <br /> margins of the subject site. This Workplan describes our proposed scope of work. <br /> ' Contaminants found nearest to the site by others include diesel at a concentration of <br /> 0.2 parts-per-million and 1,1-dichloroethane at 0.9 parts-per-billion; these were <br /> detected more than 200 feet westerly and 1000 feet southwesterly, respectively. <br /> The general site location is shown on the attached Plate 1, Vicinity Map. Our <br /> proposed sampling locations are shown on the attached Reimer & Associates Utility <br /> ' Plan presented as Exhibit 1 . A Letter of Acknowledgement signed by Mark III's <br /> Gregory Schubert is presented as Exhibit 2. Our Site Safety Plan is appended. <br /> ' 3176 INDUSTRIAL BLVD. • WEST SACRAMENTO,CA 95691 9 TELEPHONE 916/371-0434 • FAX 916/371-1809 <br />