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g&. <br /> 5 <br /> A bentonite seal consisting of 3/8 inch Voiclay bentonite pellets <br /> was poured into place above the sand pack. The bentonite seal was <br /> 2.8 feet thick. Two buckets of clean water were poured into the <br /> augers to hydra't'e the seal. The hole was then grouted to the <br /> surface using a five percent (by dry weight) bentonite/portland <br /> cement grout, placed into the augers. The grouting procedure was <br /> -' observed and approved by the San Joaquin County Public Health <br /> services, Environmental Health Division grout inspector. As-built <br /> well construction details are presented in Figure A-3. <br /> On March 28, 1990, WESTON supervised development of the monitoring <br /> " well. The development consisted of a combination of swabbing and <br /> bailing the well for a total of four and a half hours. Water <br /> samples were collected in a glass container at 15 minute and 30 <br /> minute intervals throughout the development in order to gauge the <br /> decrease in turbidity over time. A total of 330 gallons were <br /> c,•+ bailed. All water removed from the well was placed in 55 gallon <br /> s steel drums with lids. Fourteen drums (six water and eight soil) <br /> remain on-site pending analysis of water samples. <br /> is <br /> r�s <br /> w <br />