Environmental statement - Flyndre and Cawdor - Maersk Oil

More documents

Recommendations

Info

3 ‐ 18 D/4114/2011 [This Page Intentionally Left Blank] Flyndre and Cawdor Environmental Statement Section 3 Environmental Baseline
Flyndre and Cawdor Environmental Statement Section 3 Environmental Baseline TOTAL ORGANIC MATTER Total Organic Matter (TOM) along the pipeline route ranged from 0.1% at section 2 (near Clyde) to 1.2% at section 1 (near Flyndre and Cawdor drill location), with no apparent correlations with particle size or water depth, and was within the mean organic content of 1.6% reported by UKOOA (2001) from surveys in the central North Sea between 1975 and 1995. TOTAL ORGANIC CARBON Total Organic Carbon (TOC) along the pipeline route varied from 0.1% to 0.6%. The mean TOC 0.4% is slightly higher than that recorded in the previous surveys in the region (Gardline 2006, and 2009); while generally comparable with the wider area. 3.3.3. SEDIMENT CONTAMINANTS Similar to water quality, OSPAR developed and adopted EACs as a method of assessing the degree of contamination in sediments. EAC values for selected metals and PAHs in sediment below which no harm to the environment is expected are given in Table 3‐7. PAHs Compound Concentration (mg/kg dw) Mercury 0.05‐0.5* Zinc 50‐500* Nickel 5‐50* Copper 5‐50* Cadmium 0.1‐1* Benzo[a]pyrene 0.1‐1* Fluoranthene 0.5‐5* Benzo[a]fluoranthene nd Indeno[1,2,3cd]pyrene nd PCB 0.001‐0.01* * = These values are provisional nd = no data available or insufficient data available Table 3‐7 Ecotoxicological Assessment Criteria (EACs) for selected trace metals and PAHs in sediment (OSPAR Commission, 2000). A summary of the contaminant levels typically found in surface sediments of the North Sea is given in Table 3‐8. Across the North Sea the quantity of total hydrocarbons in sediments tends to show an increase from the SNS to the NNS with background hydrocarbon concentrations being generally higher in fine sediments (muds and silts) than in coarser sediments (sand and gravels) due to their greater surface area and adsorptive capacity. Nevertheless, it is noteworthy that drilling activity and hence the input of oil derived contaminants has been considerably more intensive in the northern and central sectors compared to the SNS and consequently this would add to the higher levels recorded further north. D/4114/2011 3 ‐ 19
Page 1 and 2:
Environmental Statement Flyndre and
Page 3 and 4:
Flyndre and Cawdor Environmental St
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16: Figure 1‐2 Flyndre and Cawdor Dev
Page 17 and 18: Flyndre and Cawdor Environmental St
Page 19 and 20: 1.5. ENVIRONMENTAL MANAGEMENT Flynd
Page 65: Flyndre and Cawdor Environmental St
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Inspections Reviews Investigation
Page 135 and 136:
Ensure the installation meets
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Flyndre and Cawdor Development Envi
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
show all

Environmental statement - Flyndre and Cawdor - Maersk Oil

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?