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Geological Technics Inc. Page 3 <br /> Work Plan <br /> Project Name: Olsen (Vernalis) <br /> Project No. 248.2 <br /> January 3, 1995 <br /> eV lamp to detect compounds with ionization potential below 10.2 eV <br /> (hydrocarbon range). <br /> The soil borings will be closed as follows: after the last soil sample has been <br /> collected the augers will be lifted 3 feet and 50 pounds of bentonite will be <br /> poured through the hollow stem of the augers and hydrated with clean tap <br /> water. A tremie pipe of sufficient length to reach the total depth of the boring <br /> will be installed through the center of the hollow stem augers and then the <br /> augers will be withdrawn from the hole. The borehole annulus will be closed <br /> by pumping a neat cement grout (<4% bentonite/cement) through the tremie <br /> tube up to grade. <br /> 2.2 Soil Sampling and Analyses <br /> All soil samples will be screened using field methods by observing <br /> discoloration and organic vapor meter reading. <br /> Up to Two soil samples from each boring will be submitted to Sherwood <br /> Laboratories (State Certified Laboratory #1400) for benzene, toluene, <br /> ethylbenzene and xylene (BTEX by method EPA 8020), and total extractable <br /> petroleum hydrocarbons (TEPH by method EPA 3540/8015m). The detection <br /> limits for the BTEX analysis is 3.0 µg/kg and 0.5 mg/kg for TEPH. A Chain of <br /> Custody will be completed for all samples collected and tracked to ensure <br /> sample integrity. <br /> 3.0 REPORTING <br /> The information gathered during this phase of work will be presented in a <br /> report which will include a summary of the geology and results of sample <br /> analyses. The project will be supervised and the report will be signed by a <br /> registered professional geologist responsible for the work. A copy of the <br /> report will be forwarded Mr. Harlin Knoll of the SJC-PHS-EHD. <br />