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.� KLEINFELDER EXPECT MORE subcontractors. OMI/Thames Water Stockton will provide a maintenance person to advise Kleinfelder on locations of known utilities. • Adequate workspace and access will be provided. Kleinfelder will attempt to advance soil push probes and collect samples at the proposed locations. If the drilling equipment cannot be positioned or if refusal occurs, alternative drilling locations or sampling methods should be investigated. • Soil and water generated during the drilling and sampling will be the responsibility of the client. Soil cuttings and decontamination rinsewater will be labeled and left on site. • This proposal is based on the presumption that the client will clearly mark utilities and will provide any and all available survey maps or other data to determine the location of existing structures, underground utilities and services. OMI/Thames Stockton Water Stockton should be aware that penetrating the site's surface is inherently risky. It is impossible to determine with certainty the precise location of all structures, which may be buried in the ground. Kleinfelder's fee is not adequate to compensate for both the performance of the services and the assumption of risk of damage to such structures. Disruption of utilities or damage to underground structures will be the responsibility of OMI/Thames Stockton Water. Services rendered by Kleinfelder to repair them will be billed at cost. Underground Service Alert (USA) at 1-800-642-2444 provides a partial location service free of charge for major utility lines. It is important that OMI/Thames Stockton Water understand that subsurface utilities buried under private property will not be marked by the public utility companies contacted by USA. Two copies of the letter report will be supplied to the client, additional copies will be provided on a time and expense basis. LIMITATIONS Kleinfelder prepared this proposal in accordance with generally accepted standards of care which exist in San Joaquin County, California at this time. It should be recognized that definition and evaluation of geologic and environmental conditions are a difficult and inexact science. Judgments leading to conclusions and recommendations are generally made with incomplete knowledge of the subsurface conditions present. More extensive studies, including subsurface investigations, may be performed to reduce uncertainties. If the client wishes to reduce the uncertainties beyond the level associated with this proposal Kleinfelder can be notified for additional consultation. No warranty, expressed or implied, is made. Kleinfelder offers various levels of investigative and engineering services to suit the varying needs of different clients. Although risk can never be eliminated, more-detailed and extensive investigations yield more information, which may help understand and manage the level of risk. Since detailed investigation and analysis involves greater 02002PROP.ENV/ST07P083R Page 4 of 6 0 2007 Kleinfelder May 17,2007