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Recording the occurrence of any site injury or illness. If unsafe conditions are encountered, if illness or injury occurs, or if the level of protection needs to be changed, the SSO or FSSO will consult in a timely manner with the Project Manager, Jim Curtis, or the Regional Safety Supervisor, Estelle Shiroma. 3.0 SITE DESCRIPTION AND HISTORY The Beckman Building at 212 W. Pine Street is located within the area downtown Lodi identified as the Lodi Groundwater Site. The soils within the Lodi Groundwater Site have been impacted by Volatile Organic Compounds (VOCs) such as tetrachloroethylene (PCE), trichloroethylene (TCE), and related compounds. The location of the Beckman Building is in close proximity to one of the source areas of PCE to the soils and groundwater within the Lodi Groundwater Site. Limited subsurface investigations have been conducted in the vicinity of the Beckman Building by various parties. The Department of Toxic and Substances Control (DTSC) detected the presence of PCE in soil gas on the property just south of the Beckman Building and in groundwater reconnaissance samples collected in the area. PCE has been detected in soil samples collected by the City of Lodi from the Beckman Building property. According to oral history of the area, previous occupants of the Beckman Building may have used PCE as part of their operations, and thereby may have contributed to the presence of PCE in soil and groundwater in this area. Typical concentrations of chemicals detected at or near the site in groundwater and soil are summarized in Tables 1 and 2, respectively. 3.1 Scope of Work A soil gas survey will be conducted at ten locations on the Beckman Building property. Eight of the sampling locations are outside the building and two of the sampling locations are inside the building. At each of the eight outside locations soil gas samples will be collected at two different depths, approximately 5 feet below ground surface (bgs) and 25 feet bgs. At the two locations inside the Beckman Building soil gas samples will be collected at approximately 5 feet bgs. All samples will be analyzed for VOCs using EPA Method 8010 by an onsite California certified mobile laboratory. The soil gas samples will be collected by advancing a hydraulically driven 1-inch diameter sampling rod at each location to the desired depth. When the sampling depth is reached, the rods are withdrawn approximately 6-inches to create a void at the tip of the rod. A small vacuum pump is attached to the top of the sampling rods and a known volume of soil gas is extracted into a vial. Once filled with soil gas, the vial is recorded onto a chain of custody record and delivered to an on site mobile laboratory for immediate analysis. At the completion of the sampling and analysis at each location, the small borehole will be filled with bentonite chips and hydrated with deionized water. For the sampling location outside the Beckman Building, the small diameter hole in the asphalt paving will be patched with asphalt cold patch at each location. Inside the Beckman Building, the small diameter hole will be filled and leveled with a quick set, non-ferrous, non-shrink concrete grout. 3!7!98 3:09 PM 3 952704.01 g:*bs1952704.011h&sp1a n.doc