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KLEINFELDER All information gathered during the study by Kleinfelder is considered confidential and will be released only upon written authorization from the client or as required by law. California law requires a person to inform the state if a situation is encountered that can be considered an immediate endangerment to the public's health or welfare and/or to the environment. ASSUMPTIONS AND CLIENT RESPONSIBILITIES This proposal and the attached cost estimate are based on the following assumptions and responsibilities: • The DeSiva Group will supply Kleinfelder with access to the site and written owner authorization for the proposed sampling, upon request. • Adequate workspace and access will be provided. Kleinfelder will attempt to advance soil borings and collect samples at the proposed locations. If the sampling equipment cannot be positioned, alternative locations or sampling methods should be investigated. • The borings are to be advanced with a Geoprobe 5410 sampling rig. If difficult conditions are encountered, alternative-sampling methods may be necessary. • Soil and water generated during the drilling and sampling will be the responsibility of the client. Due to the nature of the Geoprobe sampling method, minimal soil cuttings and equipment rinseate will be generated. Soil cutting and rinseate will not be contained and will be left on site next to each boring. • 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 tanks, existing structures, underground utilities and services. • The client 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 (such as septic system tanks, leach fields or irrigation lines) 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. • Underground Services Alert (USA) at 1-800-642-2444 provides a partial location service free of charge for major utility lines. It is important that The DeSilva Group understands that subsurface structures (such as the septic systems and leach fields) buried under private property will not be marked by the public utility companies contacted by USA. Kleinfelder can make contact with USA for a site visit, if requested. 02001PROP.ENV/ST04P222/DGD:ss Page 7 of 10 Copyright 2004,Kleinfelder,Inc. May 26,2004