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/6- <br /> <br />Location of We11s <br />There were 16 injection wells which received liquid industrial <br />wastes. These extend approximately 295 meters (699 feet) below <br />ground surface into the Detroit River Gtoup limestone formation <br />under pressures of H to 459 psi. In addition, Dow Chemical <br />operated two storage caverns at a depth of 533 meters (1999 <br />feet) under gravity feed into the Salina (salt) formation. A <br />map of the well locations is attached. <br />Substances and Quantities Disposed <br />See attached table. <br />Previous Upwelling <br />There is historical docuirentation to suggest that pressurizes <br />waste has ;migrated from the Detroit River Group formation <br />resulting in the flowing o° industrial wastes from abandorc~ <br />wells in both Lambton County and Port Huron Michigan areas. In <br />1967, several abandoned wells in Port Huron, Michigan began to <br />flow, yielding water containing phenols and 'Hydrogen sulphide. <br />In 1972, an abandoned 44m (149 ft.) well behind the Capitol <br />Theatre in Sarnia began to flow. The greenish liquid contiined <br />high levels of phenol, chloride, hydrogen sulphide and organic <br />carbon. In the same year, 2 water wells on the Imperial Oil <br />Ltd. property began to discharge similar-type liquids. De=? <br />well disposal of such waste was subsequently discontinued, <br />however, deep well disposal of brine wastes continues. <br />