OBEN GAS DEVELOPMENT PROJECT

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Chapter Three Description of Environment Table 3.1: Wind Speed and Direction within Oben Field Location Wind speed (m/s) Wind direction Weather Condition AQ1 (at shell living quarter) W D W D W D 2.10 1.5 SW NE SWW SMB AQ2 (Aidenyoba) 1.58 1.2 SW NE SWW SMB AQ3 (Flowstation) 2.10 1.2 SW NE SWW SMB AQ4 (Igueleba) 1.25 0.9 SW NE SWW SMB AQ5 (Obazogbenugu) 2.10 1.5 SW NE SWW SMB Key to Weather Condition SMB = Sunny with moderate breeze; SWW = Sunny and Windy Weather D = Dry season W = Wet season 3.2.2 Air Quality and Noise The results of in-situ air quality studies in the Oben Field area are presented in Table 3.2. Noise levels ranged from 54.2-80.8dB(A), which is lower than DPR/FMEnv limits of 90.0dB(A). Gaseous pollutants, NOx, SOx suspended particulate matter (SPM) and all other air quality indicators are all below DPR/FMEnv limits. There was no significant seasonal variation in the air quality and noise levels at 95% confidence levels Table 3.2 Air Quality and Noise results for Oben Sampling Stations C0 µg/m 3 NH3 µg/m 3 VOC µg/m 3 3-2 Parameters SPM µg/m 3 NOx µg/m 3 SOx µg/m 3 NOISE LEVEL dB(A) W D W D W D W D W D W D W D AQ 1 0.10 0.32 9.2 8.11
Chapter Three Description of Environment 3.2.3 Soil Studies The texture of the soils in Oben Field ranges from sand to loamy sand. The dominant texture is sandy soil with a mean percentage sand of 83.2% during the dry season and 80.1% during the rainy season (Table 3.3a and 3.3b). The percent silt and clay are low. Clay particles ranged from 3.60% to 15.2% in the dry season and 3.94% to 14.11% in the rainy season with a mean of 7.4% and 7.2% respectively. The environmental implication of this composition is that the porosity is high and water infiltration into the subsoil will be fast. The soil pH is strongly to moderately acidic. The values ranged from 4.30 – 5.35 in the dry season and 4.9 to 6.4 in the rainy season with a mean of 4.78 and 4.94 respectively (Table 3.3a and 3.3b). The organic matter values are high. The values ranged from 2.27 to 4.03% with an average of 2.67% in the dry season and 2.98 to 5.98% with an average of 3.68% in the rainy season (Table 3.3a and 3.3b). The high values could be attributed to the old fallows and forest that abound in the area. The Oben Field is part of the Urhonigbe forest reserve. The total nitrogen values ranged from 0.40 to 0.95% with an average of 0.61% in the dry season while in the rainy season it ranged from 0.43 to 1.71% with an average of 0.95%. These values are high (Table 3.3a and 3.3b) due to organic matter decay. The available phosphorus is moderately high (Table 3.3a and 3.3b). The values ranged from 11.45 – 80.0 mg/Kg with an average of 40 mg/Kg in the dry season and 21.23 to 90.5mg/Kg with an average of 50.5mg/Kg in the rainy season. This is an indication of high soil fertility despite the acidic nature of these soils. Table 3.3a: Physicochemical Characteristics of Soil in the Oben Field Area (Dry Season) S/N PARAMETERS SS1 SS2 SS3 SS4 SS5 SS6 SS7 SS8 RANGE 1 Particle Size Analysis % Sand 78.64 82.32 84.2 85.4 87.9 87.4 82.4 84.4 78.62 – 93.50 % Silt 2.88 3.40 0.50 0.64 2.48 2.42 2.32 0.84 0.50 – 3.40 % Clay 3.88 3.60 14.2 15.2 15.0 14.3 14.3 13.2 3.60 – 15.2 2 pH 4.33 4.81 4.89 5.30 5.31 5.30 5.29 5.31 4.30 – 5.35 3 Electrical Conductivity (u s /cm) 123.0 127.4 128.4 128.1 125.6 128.1 123.5 127.9 120 – 129.60 4 Organic matter (%) 2.27 3.11 3.45 2.68 3.78 3.86 4.01 4.03 2.27 – 4.03 5 Total Nitrogen (%) 0.45 0.67 0.78 0.54 0.74 0.72 0.75 0.95 0.40 – 0.95 6 Available Phosphorus (mg/Kg) 11.45 30.4 28.3 31.2 80.0 44.8 43.8 31.2 11.45 – 80.0 7 Exchangeable Cations (cmol/kg) Ca 0.12 0.20 0.26 0.24 0.18 0.21 0.24 0.28 0.12 – 0.28 Mg 0.40 0.72 0.64 0.88 0.70 0.82 0.83 0.81 0.40 – 0.88 Na 0.44 0.50 0.53 0.49 0.49 0.52 0.50 0.44 0.44 – 0.53 K 0.15 0.16 0.17 0.10 0.20 0.18 0.16 0.12 0.10 – 0.20 8 Cation Exchange Capacity 1.05 1.67 1.87 1.24 1.42 1.29 1.24 1.26 1.05 – 1.87 3-3
Page 1 and 2: The Shell Petroleum Development Com
Page 3 and 4: Table of Contents and Executive Sum
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Page 41 and 42: Chapter Two Project Justification D
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Chapter Three Description of Enviro
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Chapter Five Mitigation Measures Ta
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Chapter Five Mitigation Measures Mi
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Chapter Six Environmental Managemen
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Chapter Seven Consultation CHAPTER
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Chapter Seven Consultation Plate 5:
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Chapter Eight Conclusion and Refere
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Environmental Impact Assessment of
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Environmental Impact Assessment of
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1 Mobilization Air quality Light/So
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Appendixes APPENDIX 2 METHODOLOGIES
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Appendixes SOIL NORTHINGS EASTINGS
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Appendixes diseases of crops. Disea
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Appendixes The elevation of each bo
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Appendixes held with the Chairman o
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- General sanitary conditions in th
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3.4.6 Health and Well being a) Adul
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Appendixes - Possible impact of the
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2.8.4 Tertiary 2.8.5 No formal educ
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Appendixes 4.11.6 N61,000 - N70,000
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Appendixes 5.6.4 Noise nuisance fro
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OBEN GAS DEVELOPMENT PROJECT

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