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t1l " rA <br />STATEMENTS <br />Purge Water Disposal <br />Non -hazardous groundwater produced during purging and sampling was accumulated at TRC's <br />groundwater monitoring facility at Concord, California, for transportation by Onyx <br />Transportation, Inc., to the ConocoPhillips Refinery at Rodeo, California. Disposal at the Rodeo <br />facility was authorized by ConocoPhillips in accordance with "ESD Standard Operating <br />Procedures — Water Quality and Compliance", as revised on February 7, 2003. Documentation of <br />compliance with ConocoPhillips requirements is provided by an ESD Form R-149, which is on <br />file at TRC's Concord Office. Purge water suspected of containing potentially hazardous material, <br />such as liquid -phase hydrocarbons, was accumulated separately in a drum for transportation and <br />disposal by Filter Recycling, Inc. <br />Limitations <br />The fluid level monitoring and groundwater sampling activities summarized in this report have <br />been performed under the responsible charge of a California Registered Geologist or Registered <br />Civil Engineer and have been conducted in accordance with current practice and the standard of <br />care exercised by geologists and engineers performing similar tasks in this area. No warranty, <br />express or implied, is made regarding the conclusions and professional opinions presented in this <br />report. The conclusions are based solely upon an analysis of the observed conditions. If actual <br />conditions differ from those described in this report, our office should be notified. <br />