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S ECOR <br /> Ms. Victoria McCartney <br /> January 19, 2005 <br /> Page 2 <br /> ASSESSMENT ACTIVITIES <br /> Proposed assessment activities are presented in the following paragraphs. <br /> SITE HEALTH AND SAFETY PLAN <br /> As required by the Occupational Health and Safety Administration (OSHA) Standard <br /> "Hazardous Waste Operations and Emergency Response" Guidelines (29 Code of Federal <br /> Regulations Section 1910.120), and by California Occupational Health and Safety !� <br /> Administration (Cal-OSHA) "Hazardous Waste Operations and Emergency Response" <br /> Guidelines (California Code of Regulations Title 8, Section 5192), SECOR will prepare or <br /> modify the existing site-specific health and safety plan (SHSP) prior to the commencement <br /> of fieldwork. Field staff and contractors will review the SHSP before beginning field <br /> operations at the site. <br /> PERMITTING <br /> Applicable permits will be obtained from the City of Ripon and the County, as necessary, <br /> prior to commencing field operations. <br /> UNDERGROUND UTILITY LOCATING <br /> Underground Service Alert (USA) will be notified a minimum of 48 hours prior to <br /> commencing field activities to identify any public utility alignments that may be in conflict <br /> with the proposed borings. In conjunction with the USA, a private utility locating company <br /> will be utilized for clearing proposed boring locations for underground utilities. <br /> GEOPROBE BORINGS <br /> Six Geoprobe borings will be advanced in the locations depicted on Figure 2. Based on <br /> fourth quarter 2004 (4Q04) groundwater monitoring data, groundwater is anticipated at a <br /> depth ranging from 30 to 34 feet below ground surface (bgs). The borings will be advanced <br /> to an approximate depth of 35 feet below ground surface or when groundwater is first <br /> encountered. <br /> Soil samples will be collected continuously and an attending SECOR geologist will log <br /> samples in accordance with ASTM D-2488 — Standard Practice for Description and <br /> Identification of Soils (Visual-Manual Procedure). Groundwater samples will be collected <br /> from each boring using a hydropunch and a stainless steel or Teflon bailer. ' <br /> Soil and Groundwater Analysis <br /> Selected soil samples will be submitted under chain-of-custody documentation to a <br /> California State certified laboratory and analyzed for total petroleum hydrocarbons as <br /> gasoline (TPHg) and methanol by EPA Method 8015, benzene, toluene, ethylbenzene, and <br /> I:\Chevron\91452\REPORTS\2005\Geoprobe_work plan.doc <br />