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Union Ice Company January 26, .19,93 <br /> 1320 Weber Street, Stockton, California <br /> Work Plan to Install Monitroring Wells Page 3 <br /> The on site geologist will log the soil borings and provide well logs with the report to <br /> the RWQCB. <br /> 5.0 SAMPLING <br /> All soil sampling equipment will be thoroughly steam cleaned before and between <br /> sampling to prevent cross contamination. Relatively undisturbed soil samples will be <br /> obtained every five feet (5') using a modified California split spoon sampling device <br /> with brass liners. The sampler will be driven by a 140 pound hammer repeatedly <br /> falling 30 inches. The blow counts necessary to drive the sampler will be recorded for <br /> each 6 inch interval to help evaluate the consistencies of the materials. These samples <br /> will be analyzed for Total chromium using the California (WET) testing method. on an <br /> atomic absorption machine. <br /> Water samples will be obtained after the wells are developed. Development will <br /> consist of pumping approximately 3 to 5 well volumes of water from each well, or until. <br /> the water is free of sediments, .and the pH, conductivity, and temperature have <br /> stabilized. Tlie samples will be tested for Electrical Condiuctivity and Total Chrondum, <br /> using a conductivity meter and an atomic absorption machine. <br /> Soils from the drilling will be contained in 55 gallon drums and labeled hazardous <br /> materials until the sample results are known. If the soils are found to contain <br /> chromium, the soils will be manifested and disposed of at a class I disposal. facility. <br /> Water from well development and sampling activities will also be contained and labeled <br /> as hazardous until the analytical results are known. If the results indicate chromium <br /> contamination WHF will recommend a complete plume definition, as well as a ground <br /> water -treatment plan. The plan will contain the necessary ingredients to clean the <br /> ground water as well as deal with the containerized water from sampling activities. <br /> 6.0 PERMITS <br /> WHF will obtain the well drilling permits required by San Joaquin County prior tc <br /> beginning the well drilling. As a courtesy, Y'HF will also provide a copy of this work <br /> plan to San Joaquin County's Environmental Health Departments Hazardous Waste <br />