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' cicotog(ca1 T-C441CS Inc Page G Groundwater Monitoring Report Project No 724 2 August 11,2003 In their correspondence dated April 24, 2002, the San Joaquin County Environmental Health Department (SJC/EHD) directed the submittal of a work plan for additional lateral plume definition GTI prepared this work plan on June 27, 2002 On September 3, 2002, Mi Nuel Henderson of SJC/EHD issued a letter requesting modifications to the work plan ' On September 25, 2002, GTI submitted a letter modifying the June 27, 2002 work plan The modifications have been approved by SJC/EHD and the work has received cost pre- approval from the USTCFP The work will be scheduled pending receipt of encroachment pen-nits from the City of Stockton The goal of the revised plan is to target certain sand horizons for disciete screen monitoring and detennine if preferred paths of migration may have allowed elevated concentrations to be missed by the current well spacing 4.0 LIMITATIONS ' This report was prepared in accordance with the generally accepted standard of care and practice in effect at the time Services were rendered It should be recognized that definition and evaluation of environmental conditions is an inexact science and that the state or practice of environmental geology/hydiology is changing and evolving and that standards existing at the present time may change as knowledge increases and the state of the practice continues to improve Further, that differing subsurface soil characteristics can be experienced within a small distance and therefore cannot be known in an absolute sense All conclusions and recommendations are based on the available data and inforination. The tasks proposed and completed during this project were reviewed and approved by the ' local regulatory agency for compliance with the law No warranty, expressed or implied, is made