A Supplemental Report Regarding the Environmental Contamination From TexPet’s E&P Activities
November 7, 2014
Once pits are covered with soil, contamination continues to spread by: seeping into surrounding and underlying soils;59 leaking through siphons, or being exposed through slope failure or unwitting site disturbance.60 The release of contamination into underlying soils was observed by TexPet’s contractors — they documented contamination in soils underlying the pits.61 TexPet’s contractors also observed that “in certain instances, roots of some secondary growth located along the perimeter provided avenues for the degraded hydrocarbons to migrate.”62 The RAP did not, however, address impacts from TexPet’s waste disposal activities outside pits and only addressed a number of specifically‐identified spill areas. For instance, the RAP did not require any groundwater or surface water testing in nearby streams. Moreover, the RAP did not require any evaluation or cleanup of wetland sediments surrounding a majority of sites. In addition to wellsite wastes discharged to pits, discharge of oily produced water from production stations to surface water bodies and wetlands resulted in the release of petroleum hydrocarbons from TexPet’s operations into the environment.63 During its period of operations, TexPet discharged 377 million barrels64 or 59 billion liters65 of produced water into the environment, primarily to surface waters of the Oriente. Historical sampling and analysis of produced water revealed TPH concentrations ranging up to 139.3 mg/L66. Based on the concentration and total volume released, TexPet’s discharge of produced water equates to release of up to 1.2 million kg of petroleum67 into the surface waters of the Oriente.
Woodward‐Clyde, 2000, § 3.2, p. 3‐4 and Figure 3‐1.
Features observed during LBG’s 2013 and 2014 site visits.
Woodward‐Clyde, 2000, Figure 3‐1, (Typical Pit Cross Section).
Woodward‐Clyde, 2000, Section 3.3.1, pg. 3‐5.
HBT Agra, 1993, § 184.108.40.206, p. 6‐20 (“Crude oil is present in the produced water discharged to these pits…Produced water is being discharged to the environment in all cases. Contamination of soil and water below the discharge pipe was noted in all cases.”).
HBT Agra, 1993, Table A‐1.
Using conversion of 1 bbl of oil = 42 gallons = 159 liters; 59 billion liters is enough water to fill more than 20,000 Olympic swimming pools.
Texaco Memo from U.V. Henderson, Subject: Ecuador NRDC Allegations Water Samples (CA1108477 through CA1108485), HBT Agra, 1993, Table 7‐2 and Fugro‐McClelland, 1992, Tables B‐1 through B‐19.
See Annex 1, Appendix E ‐ TexPet Produced Water Calculations.