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I KLEINFELDER eneo,a.oei•.nienrsowra:. from each of the probes advanced within the former containment area (< 5 feet bgs) and at 5 to 10 foot intervals to the proposed maximum depth of approximately 25 feet bgs. Samples from peripheral probes will be collected at slightly deeper depths initially and then at 5 to 10 foot intervals. Sampling depths may vary depending upon field observations indicating evidence of sulfuric acid impacted soils. However, it is estimated three soil samples from each boring will be sufficient for the purposes of the assessment. After collection, the soil samples will be labeled, logged on a chain-of-custody form, and immediately stored in an iced cooler. The samples will be transported under chain-of- custody control to Kleinfelder's office and then transported by courier in a chilled container to a State Certified Laboratory to perform the requested analyses. Kleinfelder proposes submittal of 24 soil samples during the pushprobe investigation for the following analyses: • pH by EPA Method 9040/9045 • Sulfate by EPA Method 300.0 • Sulfur by EPA/Standard Methods The samples will be submitted on a standard 10 to 15 business day turn around time. Task 3 — Reporting Upon completion of the field activities and receipt of the analytical results, a draft report of findings will be prepared for client and agency review. The report will include: • A description of the field activities, observations, and protocols; • Tabulated results of soil samples with copies of certified analytical results; • A graphical representation of sample locations; • Description and documentation of QA/QC procedures employed for field and laboratory work; and • Kleinfelder's conclusions and recommendations based on the data obtained during sampling activities. As set forth above, 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. Therefore, the client shall be 97064.T1/ST08P785 August 29,2008 ©2008 Kleinfelder Page 3 of 5