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TENTATIVE SCHEDULE <br /> Following EHD approval of this Work Plan, it is anticipated that the vapor sampling will occur <br /> within two weeks thereafter. However, this is subject to potential weather delays as the vapor <br /> sampling should not occur within five days of a storm producing significant (approximately 0.5- <br /> inch or more) of rain. The field work is a two day process. j� The laboratory turnaround is two <br /> weeks. Unless there are multiple storms or unexpected findings that necessitate the`site-specific <br /> risk assessment, our report should be available by January 2007. i <br /> If you have any questions regarding this Work Plan, please callus at (209) 833-0758. <br /> Sincerely, <br /> Wright Environmental Services, Inc. <br /> John Lynch Eric R. Lautenbach, CE 42437 <br /> Principal Senior Environmental Engineer <br /> cc: Janis Brown, Cox& Cox <br /> Dennis Cox <br /> Gary Cox <br /> Earl Breitstein <br /> James Barton, Central Valley Regional Water Quality Control Board <br /> i• I <br /> i <br /> Attachments: Table A—Aggregate Summary of On-Site Soil Test Data (max. depth 12') <br /> Figure A— Site Plan Showing Sampling Points Listed in Table A <br /> Figure B—Proposed Soil Vapor Sampling Locations (open triangles) <br /> Appendix— Standard Procedures for Soil Vapor Sampling (Toxichem)i <br /> I <br /> 1 <br /> I <br /> Reference: <br /> San Francisco Bay Regional Water Quality Control Board (SFBRWQCB), 2005, Screening <br /> for Environmental Concernsat Sites with Contaminated Soil and Groundwater, February, <br /> 2005 (ESL Surfer revised October 2005). <br /> s <br /> R <br /> Page 4 of 4 <br /> ,I <br />