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• Groundwater Monitoring and Sampling October 25th <br /> • Groundwater monitoring (depth to groundwater only) November 25th <br /> • Groundwater monitoring (depth to groundwater only) December 23rd <br /> UTILITY SUR -EY/NOTIFICATIOlI <br /> S&B will notify Underground Services Alert (USA/Dig Alert) forty-eight (48) hours before the <br /> scheduled start of the field work. S&B will mark on the ground the location of the proposed <br /> boreholes and will proceed with the drilling only after the borehole location has been inspected <br /> and cleared by the utility representatives. <br /> TAILGATE HEAT.TH AND_SAFETY MEETIN-G <br /> Before the start of field operations, a Tailgate Health and Safety Meeting will be conducted each <br /> day by the Project Manager or Health and Safety Officer to discuss anticipated risks and health <br /> hazards and the proper precautions that need to be observed. <br /> SDIL_B9_RI1IGS <br /> Four geoprobe borings are proposed to be drilled to characterize the subsoil. The boreholes will <br /> be located at the basement of the subject property near the elevator. They will be cored to a <br /> depth of 15 feet below basement level or to groundwater which whichever is encountered first. <br /> The depth to groundwater at the site is reported to be approximately 24 feet below ground surface <br /> (bgs). In the basement, groundwater is reported to be at approximately 14 feet bgs. The location <br /> of the proposed boreholes is shown in the attached Borehole Location Map. <br /> Because of limited access, S&B will utilize a limited access Geoprobe rig. The boreholes will be <br /> cored with a rig equipped with a hydraulic-powered percussion drive sampler. Soil samples will <br /> be obtained with a probing tool lined with three (3) 1-inch diameter by 6-inch long brass tubes. <br /> The probing tool will be pushed or hammered hydraulically into the soil. The bottom brass tube <br /> will be retained for laboratory analysis. The open ends of the retained sample tube will be <br /> covered with Teflon material, capped with plastic end caps, labeled, double-bagged in sealable <br /> plastic bags, entered into a chain-of-custody form and placed on ice in a portable cooler for <br /> delivery to a California DHS-certified laboratory for analysis. <br /> Soil samples will be collected at every five-foot interval, starting at five (5) feet bgs. <br /> A portion of each recovered soil sample will be placed in a sealable plastic bag, disaggregated to <br /> release any volatile petroleum hydrocarbons, allowed to set for a few minutes, and then field <br /> screened using a Photo Ionization Detector (PID). Samples with high PID readings will be <br /> analyzed for petroleum hydrocarbons. In the absence of significant PID measurements, selected <br /> representative samples will be analyzed. Soil samples will be examined, described and logged <br /> American Savings Bank Project a 9620-040-1 <br /> October 9, 1994 2 Stockton,California <br />