APPENDIX I – HORIZONTAL AND VERTICAL GRADIENTS

Groundwater Gradient - Horizontal - QA / WSTF Overall Groundwater Gradient (MW2-16 > 13 > 2-1 > 2-12 > 2-10 > 2-9S > 2-5 > PZ2-1 > MW2-7) MW2-16 MW2-7 Horizontal GW Gradient Date GW Elev. GW Elev. Dist. (feet) (feet/foot) 11/08/07 2078.20 1819.79 8587 0.030

Groundwater Gradient - Horizontal - QA / WSTF Overall Groundwater Gradient (MW2-17S > 2-14 > 2-13 > 2-1 > 2-12 > 2-10 > 2-9S > 2-5 > PZ2-1 > MW2-7)

Date 11/08/07

- through Source Area MW2-17S MW2-7 Horizontal GW Elev. GW Elev. Dist. (feet) 2024.82 1819.79 7042

GW Gradient (feet/foot) 0.029

Date 11/08/07

Groundwater Gradient (MW2-16 -> MW2-13) MW2-16 MW2-13 Horizontal GW Gradient GW Elev. GW Elev. Dist. (feet) (feet/foot) 2078.20 1983.27 2800 0.034

Date 11/08/07

Groundwater Gradient (MW2-17S -> MW2-14) MW2-17S MW2-14 Horizontal GW Gradient GW Elev. GW Elev. Dist. (feet) (feet/foot) 2024.82 2008.37 481 0.034

Date 11/08/07

Groundwater Gradient (MW2-14 -> MW2-13) MW2-14 MW2-13 Horizontal GW Gradient GW Elev. GW Elev. Dist. (feet) (feet/foot) 2008.37 1983.27 777 0.032

Date 11/08/07

Groundwater Gradient (MW2-13 -> MW2-1) MW2-13 MW2-1 Horizontal GW Elev. GW Elev. Dist. (feet) 1983.27 1979.25 438

GW Gradient (feet/foot) 0.009

Date 11/08/07

Groundwater Gradient (MW2-1 -> MW2-12) MW2-1 MW2-12 Horizontal GW Elev. GW Elev. Dist. (feet) 1979.25 1966.36 625

GW Gradient (feet/foot) 0.021

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Groundwater Gradient (MW2-12 -> MW2-10) MW2-12 MW2-10 Horizontal Date GW Elev. GW Elev. Dist. (feet) 11/08/07 1966.36 1944.07 311

GW Gradient (feet/foot) 0.072

Groundwater Gradient (MW2-10 -> MW2-9S) MW2-10 MW2-9S Horizontal Date GW Elev. GW Elev. Dist. (feet) 11/08/07 1944.07 1901.43 1475

GW Gradient (feet/foot) 0.029

Groundwater Gradient (MW2-9S -> MW2-5) MW2-9S MW2-5 Horizontal Date GW Elev. GW Elev. Dist. (feet) 11/08/07 1901.43 1872.79 1094

GW Gradient (feet/foot) 0.026

Groundwater Gradient (MW2-9S -> MW2-6S) MW2-9S MW2-6S Horizontal Date GW Elev. GW Elev. Dist. (feet) 11/08/07 1901.43 1873.08 1,100

GW Gradient (feet/foot) 0.026

Groundwater Gradient (MW2-5 -> PZ2-1) MW2-5 PZ2-1 Horizontal Date GW Elev. GW Elev. Dist. (feet) 11/08/07 1872.79 1828.45 1571

GW Gradient (feet/foot) 0.028

Groundwater Gradient (PZ2-1 -> MW2-7) PZ2-1 MW2-7 Horizontal Date GW Elev. GW Elev. Dist. (feet) 11/08/07 1828.45 1819.79 299

GW Gradient (feet/foot) 0.029

Groundwater Gradient (PZ2-1 -> MW2-8) PZ2-1 MW2-8 Horizontal Date GW Elev. GW Elev. Dist. (feet) 11/08/07 1828.45 1818.58 284

GW Gradient (feet/foot) 0.035

Groundwater Gradient (MW2-11 -> MW2-10) MW2-11 MW2-10 Horizontal Date GW Elev. GW Elev. Dist. (feet) 11/08/07 1956.41 1944.07 526

GW Gradient (feet/foot) 0.023

QA / WSTF Groundwater Gradient (MW2-1 > MW2-7)

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Groundwater Gradient - Horizontal - STF Overall Groundwater Gradient (MW2-2 > 2-18 > 2-4D > 2-9D > 2-6D > 2-7D) MW-2-2 MW2-7D Horizontal Date GW Elev. GW Elev. Dist. (feet) 11/08/07 2068.55 1820.81 8551

GW Gradient (feet/foot) 0.029

Groundwater Gradient - Horizontal - STF Overall Groundwater Gradient (MW2-17D > 2-18 > 2-4D > 2-9D > 2-6D > 2-7D) - through Source Area

Date 11/08/07

Date 11/08/07

MW2-17D GW Elev. 2025.38

MW2-7D GW Elev. 1820.81

Horizontal Dist. (feet) 6981

Groundwater Gradient (MW2-2 -> MW2-18) MW-2-2 MW2-18 Horizontal GW Elev. GW Elev. Dist. (feet) 2068.55 1979.43 3224

GW Gradient (feet/foot) 0.029

GW Gradient (feet/foot) 0.028

Date 11/08/07

Groundwater Gradient (MW2-18 -> MW2-4S) MW2-18 MW2-4S Horizontal GW Gradient GW Elev. GW Elev. Dist. (feet) (feet/foot) 1979.43 1936.73 1078 0.040

Date 11/08/07

Groundwater Gradient (MW2-18 -> MW2-4D) MW2-18 MW2-4D Horizontal GW Gradient GW Elev. GW Elev. Dist. (feet) (feet/foot) 1979.43 1930.54 1078 0.045

Date 11/08/07

Groundwater Gradient (MW2-4D -> MW2-9D) MW2-4D MW2-9D Horizontal GW Gradient GW Elev. GW Elev. Dist. (feet) (feet/foot) 1930.54 1897.07 1307 0.026

Date 11/08/07

Groundwater Gradient (MW2-9D -> MW2-6D) MW2-9D MW2-6D Horizontal GW Gradient GW Elev. GW Elev. Dist. (feet) (feet/foot) 1897.07 1872.25 1113 0.022

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Date 11/08/07

Groundwater Gradient (MW2-17D -> MW2-18) MW2-17D MW2-18 Horizontal GW Gradient GW Elev. GW Elev. Dist. (feet) (feet/foot) 2025.38 1979.43 1654 0.028

Date 11/08/07

Groundwater Gradient (MW2-6D -> MW2-7D) MW2-6D MW2-7D Horizontal GW Gradient GW Elev. GW Elev. Dist. (feet) (feet/foot) 1872.25 1820.81 1830 0.028

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Groundwater Gradient - Vertical

Date 09/07/06 11/20/06 03/07/07 11/08/07

2-16 (shallow) GW Elev. 2079.47 2079.01 2078.54 2078.20

2-2 (deep) GW Elev. 2069.32 2069.10 2068.92 2068.55

Area J - Vertical Gradient (2-16 (STF) and 2-2 (STF)) Shallow Shallow Shallow Shallow Deep Vertical Gradient GW Gradient GSE Top SE Bot SE Wet SCE Wet SCE Dist. (SC, feet) Sign (feet/foot) 2135.19 2078.69 2068.69 2073.69 2024.73 48.96 0.207 2135.19 2078.69 2068.69 2073.69 2024.73 48.96 0.202 2135.19 2078.69 2068.69 2073.62 2024.73 48.88 0.197 2135.19 2078.69 2068.69 2073.45 2024.73 48.71 0.198 0.201

2-17S (shallow) Date GW Elev. 11/20/06 2025.06 03/07/07 2024.99 11/08/07 2024.82

Northwest Arm - Vertical Gradient (2-17S (STF) and 2-17D (STF)) 2-17D (deep) Shallow Shallow Shallow Shallow Deep Vertical Gradient GW Gradient GW Elev. GSE Top SE Bot SE Wet SCE Wet SCE Dist. (SC, feet) Sign (feet/foot) 2024.79 2092.10 2027.10 2017.10 2021.08 1995.60 25.48 0.011 2024.66 2092.10 2027.10 2017.10 2021.05 1995.60 25.45 0.013 2025.38 2092.10 2027.10 2017.10 2020.96 1995.60 25.36 + 0.022 0.015

Date 02/16/05 06/02/05 09/21/05 11/29/05 12/31/05 03/09/06 05/31/06 09/07/06 10/02/06 11/20/06 03/07/07 11/08/07

2-4S (shallow) GW Elev. 1937.99 1938.10 1937.86 1937.61 1937.68 1937.69 1937.72 1937.53 1937.44 1937.37 1937.23 1936.73

Area L - Vertical Gradient (2-4S (STF) and 2-4D (STF)) 2-4D (deep) Shallow Shallow Shallow Shallow Deep Vertical Gradient GW Gradient GW Elev. GSE Top SE Bot SE Wet SCE Wet SCE Dist. (SC, feet) Sign (feet/foot) 1930.91 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.283 1931.33 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.271 1931.12 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.270 1930.67 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.278 1930.87 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.272 1931.08 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.264 1931.06 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.266 1931.09 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.258 1931.04 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.256 1931.11 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.250 1931.10 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.245 1930.54 1984.56 1924.56 1914.56 1919.56 1894.56 25.00 0.248 0.263

Date 11/20/06 03/07/07 11/08/07

2-1 (shallow) GW Elev. 1980.88 1980.30 1979.25

Area K - Vertical Gradient (2-1 (QA/WSTF) and 2-18 (STF)) 2-18 (deep) Shallow Shallow Shallow Shallow Deep Vertical Gradient GW Gradient GW Elev. GSE Top SE Bot SE Wet SCE Wet SCE Dist. (SC, feet) Sign (feet/foot) 1981.03 2032.90 1982.90 1962.90 1971.89 1936.92 34.97 + 0.004 1980.44 2032.90 1982.90 1962.90 1971.60 1936.92 34.68 + 0.004 1979.43 2032.90 1982.90 1962.90 1971.08 1936.92 34.16 + 0.005 0.005

Date 12/13/05 03/09/06 05/31/06 09/07/06 10/02/06 11/20/06 03/07/07 11/08/07

2-6S (shallow) GW Elev. 1875.08 1874.49 1874.21 1874.14 1874.18 1874.15 1873.80 1873.08

Downgradient - Vertical Gradient (2-6S (QA/WSTF) and 2-6D (STF)) 2-6D (deep) Shallow Shallow Shallow Shallow Deep Vertical Gradient GW Gradient GW Elev. GSE Top SE Bot SE Wet SCE Wet SCE Dist. (SC, feet) Sign (feet/foot) 1874.25 1904.99 1876.99 1866.99 1871.04 1850.49 20.54 0.040 1873.71 1904.99 1876.99 1866.99 1870.74 1850.49 20.25 0.039 1873.43 1904.99 1876.99 1866.99 1870.60 1850.49 20.11 0.039 1873.24 1904.99 1876.99 1866.99 1870.57 1850.49 20.08 0.045 1873.24 1904.99 1876.99 1866.99 1870.59 1850.49 20.10 0.047 1873.22 1904.99 1876.99 1866.99 1870.57 1850.49 20.08 0.046 1872.92 1904.99 1876.99 1866.99 1870.40 1850.49 19.91 0.044 1872.25 1904.99 1876.99 1866.99 1870.04 1850.49 19.54 0.042 0.043

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Date 09/07/06 11/20/06 03/07/07 11/08/07

2-9S (shallow) GW Elev. 1902.84 1902.51 1902.39 1901.43

Downgradient - Vertical Gradient (2-9S (QA/WSTF) and 2-9D (STF)) 2-9D (deep) Shallow Shallow Shallow Shallow Deep Vertical Gradient GW Gradient GW Elev. GSE Top SE Bot SE Wet SCE Wet SCE Dist. (SC, feet) Sign (feet/foot) 1898.83 1935.46 1906.46 1891.46 1897.15 1868.90 28.25 0.142 1898.05 1935.46 1906.46 1891.46 1896.99 1868.90 28.09 0.159 1897.87 1935.46 1906.46 1891.46 1896.93 1868.90 28.03 0.161 1897.07 1935.46 1906.46 1891.46 1896.45 1868.90 27.55 0.158 0.155

Date 11/19/08

2-7 (shallow) GW Elev. 1819.79

Downgradient - Vertical Gradient (2-7 (QA/WSTF) and 2-7D (wSTF)) 2-7D (deep) Shallow Shallow Shallow Shallow Deep Vertical Gradient GW Gradient GW Elev. GSE TOS BOS Wet SCE Wet SCE Dist. (SC, feet) Sign (feet/foot) 1820.81 1836.99 1825.49 1810.49 1815.14 1774.96 40.18 + 0.025 GW Elev. - groundwater elevation (feet msl) GSE - ground surface elevation (feet msl) BOS - bottom of screen elevation (feet msl) TOS - top of screen elevation (feet msl) SCE - screen center elevation (feet msl) SC - screen centers

Additional Monitoring Well Installation and Site Characterization Report Former Discharge Ponds and Southern Property Boundary Beaumont Site 2

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