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15 April 1996 f <br /> AGE-NC Project No 95-0121 <br /> Page 7,,of 9 <br /> t1 Prepare a Site Health and Safety Plan in accordance with the Occupational Safety and Health <br /> Guidance Manual for-Hazardous Waste Site Activities - Prepared by National Institute for <br />' Occupational Safety and Health, Occupational Safety and Health Administration, U S Coast <br /> Guard and U S Environmental Protection Agency, October 1985 <br /> 2 Notify the San Joaquin County Environmental Public Health Services - Environmental Health <br />' Division (PHS-EHD) 48 hours prior to commencement of any work, while securing proper <br /> city/county soil boring permits <br />' 3 Boring locations will be marked at least 48 hours in advance for an Underground Service <br /> Alert (USA) check of underground utilities or pipes <br />' 4 Advance six soil borings to a total depth of approximately 25 feet bsg utilizing a truck- <br /> mounted drill rig, and 8 25-inch diameter hollow stem augers Soil boring locations are <br /> depicted on Figure 4 <br />' 5 Stearn-clean hollow stens augers before advancing into boring <br /> 6 Complete each soil boring as a soil vapor extraction well The boring will be completed using <br /> 2-inch diameter slotted PVC screen from an approximate depth of 10 to 25 feet bsg Blank <br /> PVC screen will be used from surface grade to a depth of 10 feet bsg A filter pack will be <br /> installed utilizing a # 3 sand from depths of 8 to 25 feet bsg, while a bentonite plug will be <br /> I placed from depths of 5,to 8 feet bsg Each well will then be backfilled to the surface with <br /> Portland cement SVE well construction diagrams are depicted iii Figure 6 <br /> 7 Cuttings and rinseate generated during drilling activities will be containerized in properly <br /> labeled D O T model 17H 55-gallon drums, and stored on-site in an area inaccessible to the <br /> general public Disposal alternatives will be evaluated based on results of laboratory analyses <br /> 4 2 INSTALLATION OF 1N--SITU AIR SPARGING WELLS <br /> I <br /> For the installation of air sparging wells, the following procedures will be,performed <br /> I' - Prepare a Site Health and Safety Plan in accordance with the Occupational Safety and Health - <br /> Guidance Manual for Hazardous Waste Site Activities - Prepared by National Institute for <br /> Occupational Safety and Health, Occupational Safety and Health Administration, U S Coast <br /> r Guard and U S Environmental Protection Agency, October 1985 <br /> 2 Notify the San Joaquin County Environmental Public Health Services - Environmental Health <br /> ` Division (PHS-EHD) 48 hours prior to commencement of any work, while securing proper <br /> Icity/county soil boring or well permits <br /> 3 Air sparging well locations will be marked at least,48 hours in advance for an Underground <br /> Service Alert (USA) check of underground utilities or pipes <br /> ! <br /> ! 4 <br /> ti ` <br />