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Table 1 <br /> Proposed LIF/CPT Boring Locations <br /> Union Pacific Railroad Company <br /> Former Maintenance Facility <br /> Tracy, California <br /> Phase II Field Investigation Work Plan <br /> Proposed LIF Depth Rationale Location <br /> Location ft bas) <br /> LIF-30 30 Assess LPH that could be associated with suspected piping. Depending on the results from In the vicinity of suspected <br /> this boring,additional stepout borings will be advanced. underground piping <br /> Delineate area northwest of LIF-16,which showed low fluorescence and north of LIF-05, <br /> LIF-31 30 which showed very high fluorescence.Also assess presence of LPH near TW-04. South of main tracks <br /> Depending on the results from this boring,additional stepout borings will be advanced. <br /> LIF-32 30 Delineate area between LIF-09 and LIF-13,which both showed low fluorescence. West of Engine House <br /> Depending on the results from this boring,additional stepout borings will be advanced. <br /> Assesses potential impacts from former TPCA excavation. Depending on the results from <br /> LIF-33 30 this boring, additional stepout borings will be advanced.The specific location of this boring Within the TPCA Pond <br /> will depend on accessibility because of site conditions(e.g.,ground surface conditions). <br /> Assesses potential impacts from former TPCA excavation. Depending on the results from <br /> LIF-34 30 this boring,additional stepout borings will be advanced. The specific location of this boring Within the TPCA Pond <br /> will depend on accessibility because of site conditions(e.g., ground surface conditions). <br /> Notes and Abbreviations: <br /> 1. Low fluorescence (less than 20%) <br /> 2. Medium fluorescence (20 to 100%) <br /> 3. High fluorescence(100 to 150%) <br /> 4.Very high fluorescence (greater than 150%) <br /> bgs-below ground surface <br /> LIF-laser induced fluorescence <br /> CPT-cone penetrometer testing <br /> LPH-Liquid Phase Hydrocarbon <br /> Tables 1-3(12-30-08).xls ARCADIS Page 2 of 2 <br />