Río San Miguel - San Matías Pipeline Environmental and Social Performance Review. In May 2003, environmental and social program specialists from Shell and Prisma Energy conducted an evaluation of GasOriente’s environmental activities along the right-of-way. The study included an overflight of the right-of-way, as well as visits to the indigenous organization CIRPAS and nearby communities such as Candelaria, San Juan, Ipias, Taperas, the Municipalities of San José, and San Matías. This inspection was followed by another field inspection made by technical consultant Dames Moore on May-June 2003.