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CAB R I A <br /> • <br /> o Cambria also proposes collecting soil samples in the southern corner of the site, in the <br /> vicinity of SB-9, where 1,2-DCA has not been detected These soil samples will also be <br /> analyzed for total lead to establish "background" lead concentrations which will be <br /> compared with lead concentrations found near boring near SB-4 <br /> • Cambria also proposes performing a record search of the surrounding area to identify any <br /> possible offsite sources of 1,2-DCA <br /> o Cambria proposes to modify the analytical program for quarterly groundwater sampling <br /> events to include 1,2-DCA analyses on groundwater samples collected from all wells at this <br /> site These data will aid in understanding the distribution of 1,2-DCA at the site and to allow <br /> evaluation of concentration trends <br /> WORK PLAN <br /> We propose to drill two soil borings and collect soil samples for total lead analysis The borings <br /> (SB-19 and SB-20) will be drilled at the locations shown on Figure 2 Boring SB-19 will be <br /> . drilled near SB-4 to evaluate total lead levels in soil near the suspected source area Boring SB- <br /> 20 will be drilled in the southern corner of the site to evaluate background total lead levels in the <br /> soil <br /> Work Tasks <br /> Well Permit Cambria has an active drilling permit with SJCEHD and is planning to perforin the <br /> drilling activities under this active permit <br /> Site Safety Plan. A Site Safety Plan will be prepared for field work <br /> Utility Clearance- The proposed drilling location will be marked and cleared through <br /> Underground Service Alert prior to drilling <br /> Site Investigation: Borings SB-19 and SB-20 will be drilled at the locations shown on Figure 2 <br /> The soil borings will be drilled with cone penetration testing (CPT) equipment Soil samples <br /> will be collected from these borings at depths of approximately 50, 60, 70, 80, and 95 feet below <br /> grade A Cambria geologist will supervise the drilling activities Soils encountered in the <br /> borings will be described using CPT logging equipment The scope of work described in this <br /> • work plan will be performed under the supervision of a registered geologist <br /> 0797 4 <br />