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I Y `• <br /> l f <br /> 275 E. Grantiine Rd. Tracy page 2 <br /> Chronology <br /> I <br /> 01/27/93 MM generates comment letter to Joseph Mell and requires workplan, to <br /> f delineate soil and groundwater plumes. MM requires workplan by March <br /> 15, 1993. ' <br /> 1 <br /> 02/05/93 MM onsite to witness monitoring well sampling. 1 <br /> 05/17/93 MM sent another comment letter to advise that the initial deadline for i <br /> workplan was not complied with and the SWRCB file review soon could <br /> indicate that the site may be in jeopardy for non-compliance. MM <br /> modifies new due date for workplan submittal and groundwater monitoring <br /> to June 16, 1993. <br /> 05/25/93 Uriah Environmental, John E. Rapp, REHS submits data in table form of ! <br /> 215193 groundwater sampling event. MW-2 only well to report hits of TPH- <br /> G = 190 ppb, T = 0.9, E = 1.1, X = 2.8, and TOG = 1.0 ppb. <br /> 06/24/93 MM generates comment letter in response to workplan submitted 6116. <br /> MM requires an addendum before approval. <br /> 08/05/93 MM reviews addendum for workplan for more soil borings in area behind <br /> the station. <br /> I <br /> 09/02/93 MM issues han&auger permit #93-1799 for approved workplan. j <br /> 09/30/93 Hand augers, "SBR-1 through SBR-10" done on site today. <br /> 11/12/93 PHS-EHD receives notice of SWRCB reimbursement (LOC) claim <br /> #003376 for$40,000. <br /> 12/21/93 MM generates another comment letter after review of the soil and <br /> groundwater extent report for hand augers done 9130. MM will require off- <br /> site investigation since soil levels at perimeters indicate low level soil <br /> contamination. Another over-excavation discussed and sets deadline of <br /> February 15, 1994 for another workplan submittal. <br /> I <br /> 1 <br /> i <br /> 02117194 MM approves workplan to over-excavate, trench, areas in north-northwest <br /> corner and side of site <br /> 02122/94 MM onsite and witnesses and directs soil sampling at trenching- <br /> over/excavation., Two separate trenches dug to max of 8' bgs. Five soil <br /> I <br />