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TRC Customer Focused Solutions 5052 Commercial Circle Concord, CA 94520-1248 I I Statement of Authorized I Transportation and Disposal This is to certify that non-hazardous groundwater produced during purging and sampling of monitoring wells at ConocoPhillips site number [[ 5 was accumulated at TRC's groundwater monitoring facility at Concord, California, for transportation by Onyx Transportation, Inc. to the ConocoPhillips Refinery at Rodeo California for disposal_ TRC records indicate that approximately ? gallons of purge water from the ite were transferred to the purge water holding tank on ! ?�( 3 The contents of the holding tank were transported to the U 't 160 Water Treatment Facility at the Rodeo Refinery on Disposal at the facility was authorized by ConocoPhillips in accordance with "ESD Standard Operating Procedures - Water Quality and Compliance , as revised on yr r. February 7, 2003- The procedure requires that TRC dispose only of monitoring well purge water from sites for which TRC services are under contract by ConocoPhillips. The non-hazardous nature of the purge water is confirmed quarterly by analysis by an independent certified laboratory of a random sample from the TRC holding facility . The sample is analyzed for all analytes and parameters that might affect the ConocoPhillips NPDES permit for ultimate disposal of the water_ Documentation of compliance with..ConocoPhillips requirements is provided by an ESD Form R-149, which is on file with ConocoPhillips. If any purge water collected at the site is suspected of containing potentially hazardous material such as liquid-phase hydrocarbons, that water was.accumulated separately in a- drum for transpportation and disposal by Filter Recycling, Inc. } E mess o this statement k 4QM Jensen ate " rogram Manager