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C A M B R I A same event, TAME was detected in wells MW-I and MW-4 at concentrations of 34 and 4 0 ppb, respectively TPHg, benzene, toluene, ethylbenzene, and xylenes (BTEX) were not detected, although some reporting hrruts were elevated Based on the analytical results from the CPT borings, SJCEHD requested submittal of a work plan for further assessment of the lateral and vertical extent of gasoline constituents in groundwater beneath the site and interim groundwater remediation Cambria subrrutted work plans on June 5, 2002 and June 21, 2002 and the results of this work are presented below RESPONSE TO SJCEHD LETTERS 8260 Peaks Report In correspondence dated July 22, 2002, SJCEHD requested that Shell "conduct a full 8260B scan and report all peaks for one quarter sampling event annually to monitor for degradation products of oxygenate compounds " Shell and Cambria are in the process of discussing this request with the RWQCB Once the matter is resolved, we will discuss this request further with SJCEHD • Deep Well Installation In their June 25,2002 letter, SJCEHD approved Cambria's June 5, 2002 Site Investigation Work Plan and requested the installation of one deep groundwater monitoring well Cambria responded in our July 24, 2002 Groundwater Monitoring Report — Second Quarter 2002, concurring that additional deep groundwater sampling is warranted At that time Cambria stated that we would like to further assess the lateral of extent of the groundwater plume prior to choosing a location for a deep groundwater monitoring well We also stated that we would propose a deep groundwater monitoring well in the site investigation report following the shallow well installations In correspondence dated October 28, 2002, SJCEHD approves Cambria's request However, the letter also requests that the deep well be installed no later than January 1, 2003, which does not allow enough time for a work plan to be submitted and approved, pnor to the well installation The work plan, proposing a deep monitoring well and discussing the proposed drilling schedule, is presented below Shell would like to install this well at the same time as the proposed offsite wells discussed below,and will make every effort to schedule the drilling as soon as possible • 0955 4