Laserfiche WebLink
1NTERNATIONAL TECHNOLOGY CORPORATION <br /> 3. 1 DRILLING METHODOLOGY <br /> IT notified Underground Services Alert (USA) two working days before starting drilling <br /> activities This, in addition to studying utility maps and hand digging each hole to four feet, <br /> helped assure that drilling activities did not encounter any underground utilities IT also <br /> acquired City of Stockton encroachment permit No 61790 and San Joaquin County, <br /> Environmental Public Health, Services, Environmental Health Division No 91-3073 Prior <br /> to starting field work each day, the field geologist conducted a Tailgate Safety Meeting to <br /> rensure that site specific hazards were identified and also to conform to the IT site specific <br /> health and safety plan <br /> The borings were drilled b Spectrum Exploration, Inc C75 License No. 512268) All <br /> g y P� P { <br /> drilling was performed with a steam cleaned, 8 diameter inch hollow stem auger The two`11\V L <br /> borings were drilled on December 7 & 8, 1991 to a depth of approximately 60 feet below <br /> grade A two inch diameter well was installed in each boring Logs of the boreholes are <br /> contained in Appendix A <br /> 3.2 SOIL SAMPLING <br /> The first boring (MW-2) drilled, was continuously cored in order to obtain a complete and <br /> detailed geologic description All subsurface materials were described using the visual <br /> method of the Unified Soil Classification System (USCS) as described in United States <br /> Bureau of Reclamation document No 5005-86 Samples were collected utilizing a split <br /> spoon sampler advanced using a 140 lb hammer dropped from a height of 30 inches The <br /> sampler housed brass tubes for collection of undisturbed samples The sampler and brass <br /> tubes was decontaminated by scrubbing with a non-phosphate detergent, several water rinses, <br /> methanol rinse and a distilled water rinse Since areas of obvious contamination and <br /> significant lithologic changes were not observed, only samples from the interface between the <br /> runsaturated and saturated zones were collected for laboratory analysis <br /> Each soil sample retained for analysis was promptly sealed with aluminum foil and plastic <br /> end caps. The samples were then placed in a "zip-loc" bag and sealed with security tape. <br /> The samples were stored in an refrigerated ice chest until delivery to the laboratory <br /> 5 <br /> 1 <br />