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Table 2 <br /> Groundwater Elevation and Product Thickness Data-First Quarter 2010 <br /> NuStar Terminals Stockton Facility <br /> Stockton,California <br /> Measurement Top of Casing Depth to Depth to Product Product Groundwater <br /> Zone Weill ID Date Elevation Groundwater ( )feet Thickness Elevation <br /> feet MSL' (feet) (feet) (feet MSL) <br /> A ST/MW-1 2/1/2010 3.67 5.75 -2.08 <br /> ST/WC-1A 2/1/2010 1.99 2.83 -0.84 <br /> PS/P-11 2/1/2010 1.03 2.25 -1.22 <br /> PS/P-12 2/1/2010 1.78 2.98 -1.20 <br /> PS/P-13 2/1/2010 1.64 2.93 -1.29 <br /> PS/P-21 2/1/2010 2.25 2.43 -0.18 <br /> PS/P-23 2/1/2010 1.94 3.36 -1.42 <br /> PS/MW-14 2/1/2010 1.33 3.08 -1.75 <br /> PS/MW-15 2/1/2010 1.75 3.82 -2.07 <br /> PS/MW-17 2/1/2010 2.22 4.76 -2.54 <br /> PS/MW-19 2/1/2010 3.58 7.94 -4.36 <br /> PS/WC-2S 2/1/2010 2.48 4.25 -1.77 <br /> PS/WC-3S 2/1/2010 1.58 5.59 -4.01 <br /> PS/WC-4S 2/112010 4.99 4.08 0.91 <br /> OW-7A 2/1/2010 1.86 6.08 -4.22 <br /> OW-8A 2/1/2010 2.08 5.76 -3.68 <br /> ACA-1A 2/1/2010 4.77 4.58 0.19 <br /> ACA-2A 2/1/2010 8.19 8.58 -0.39 <br /> ACA-3A/13 2/1/2010 3.53 3.13 0.40 <br /> ACA4A/13 2/1/2010 4.14 4.95 -0.81 <br /> B ST/WC-113 2/1/2010 1.80 3.54 -1.74 <br /> PS/WC-2M 2/1/2010 2.30 6.45 -4.15 <br /> PS/WC-3M 2/1/2010 1.74 5.35 -3.61 <br /> PS/WC-4M 2/1/2010 4.64 3.99 0.65 <br /> OW-76 2/1/2010 1.81 6.35 -4.54 <br /> OW-813 2/1/2010 2.06 5.64 -3.58 <br /> C ACA-113 2/1/2010 4.60 6.30 -1.70 <br /> ACA-213 2/1/2010 8.06 10.71 -2.65 <br /> ST/WC-1C 211/2010 1.44 3.35 -1.91 <br /> OW-7C 2/1/2010 1.83 6.92 -5.09 <br /> OW-8C 211/2010 2.02 6.69 -4.67 <br /> ACA-3C 2/1/2010 3.60 3.68 -0.08 <br /> ACA-4C 211/2010 3.92 6.23 -2.31 <br /> ACA-5C 211/2010 4.02 6.24 -2.22 <br /> D OW-6D 211/2010 1.86 6.53 -4.67 <br /> OW-7D 2/1/2010 1.85 7.10 -5.25 <br /> Notes: <br /> 1. feet MSL=Feet relative to mean sea level. <br /> 2. --=No product or not applicable. <br /> 3. NS=Well has not been surveyed to benchmark of historical leasehold wells. <br /> 4. The top of casing elevation for OW-61)is from a previous surveying event and is not compatible with current data. <br /> 5. Elevation was corrected in wells with the presence of measurable separate-phase hydrocarbons <br /> using the following equation and assuming a specific gravity for gasoline product of 0.8 gram per <br /> cubic centimeter(Merck 1989): <br /> hW= P9 h9 <br /> l <br /> water-level elevation=top of casing elevation+[hw-dW] <br /> where: <br /> hW=groundwater level elevation l=density of water <br /> dW=depth to groundwater measuring point h9=product thickness <br /> l=density of separate-phase hydrocarbons <br /> Reference: Merck Index 1989,An Encyclopedia of Chemicals,Drugs and Biologicals, <br /> Merck and Company,Rahway,New Jersey. <br /> Groundwater Monitoring Report-First Quarter 2010 <br /> 1014-09 <br /> Page 1 of 1 <br />