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KLEINFELDER <br /> 7 ASSUMPTIONS AND LIMITATIONS <br /> 7.1 ASSUMPTIONS <br /> This workplan is based on the following assumptions: <br /> • California Nuggets, Inc. will supply Kleinfelder with written authorization to <br /> obtain access to the site to install and sample the wells. <br /> • Adequate work space and access will be provided. <br /> • The monitoring wells will be located based on the current sprayfield and retention <br /> ponds as described to Kleinfelder for the preparation of this workplan. If the site <br /> plan changes after well installation the effected monitoring well locations may <br /> need to be abandoned and relocated. <br /> • Kleinfelder has not reviewed any RWQCB documentation related to the subject <br /> site and therefore, this workplan was developed based on usual request from the <br /> RWQCB fora baseline assessment at similar sites. Therefore, Kleinfelder is not <br /> responsible for potential omissions related to specific requests for a baseline <br /> assessment workplan that the RWQCB may have documented for the subject site. <br /> • Drilling/sampling derived wastes will be generated during the proposed <br /> investigation. Excess drilling returns will not be contained and left on site. Water <br /> generated during well development/purging/sampling and water derived from <br /> equipment decontamination will not be contained and will be dispersed to the land <br /> surface. <br /> • California Nuggets, Inc. should be aware that penetrating the site's surface is <br /> inherently risky. It is impossible to determine with certainty the precise location <br /> of all structures (such as septic system tanks or leach fields) which may be buried <br /> in the ground. Kleinfelder's fee is not adequate to compensate for both the <br /> performance of the services and the assumption of risk of damage to such <br /> structures. If the active septic system or utilities on site are damaged by our field <br /> activities, repairs will be necessary in order to provide continued service. Repairs <br /> are not included in Kleinfelder's fees. <br /> • Underground Services Alert (USA) at 1-800-642-2444 provides a partial location <br /> service free of charge for major utility lines. It is important that the client <br /> understand that subsurface structures (such as the septic systems, irrigation lines, <br /> leach fields, et cetera) buried under private property will not be marked by the <br /> 50890.E01/ST05R358/JDZ:ly Page 10 of 12 <br /> ®2005,Kleinfelder,Inc. April 29,2005 <br />