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} <br /> - <br /> y Chronology - 3128 W. Ben Holt Dr. if page 2 <br /> { <br /> 10/05/92 Southland Corporation added as additional RP (landowner). <br /> i° <br /> 07115193 Delta Environmental places eight soil borings (SB-1 thru SB-8) under EHD <br /> permit for lateral and vertical delineation as required by Ml. SB-5 hottest <br /> with only 0.1 ppm Benzene at 11' bgs. i# <br /> 06/01/94 Local Stockton newspaper, The Record, calls with questions raised by <br /> unhappy neighbors since site is said to be unkempt and not maintained. <br /> Doug VViIson, Supervisor UGT Unit 3, fields reporters questions. Public <br /> files suit against Exxon. <br /> a <br /> 04/21/95 Site starts groundwater pumping test in preparation for possible <br /> groundwater extraction to remove low levels of;Benzene (16 ppb) in MW-5 <br /> only. Approx. 1200 gallons of groundwater purged from MW-5 by <br /> ,r <br /> pumper/vacuum truck. <br /> 05/25/95 LOP prioritizes all LOP sites. This site is is "PSDW/ 3A2". <br /> 11/14/95 Delta conducts soil vapor extraction test (;SVE)funder approved plan by <br /> MI. li <br /> 01/17/96 After multiple groundwater extraction tests revealed that Benzene <br /> concentrations increased after each test, MI takes site to the Technical i <br /> Review Committee (TRC) for next steps needed. The TRC recommends ' <br /> groundwater be sampled for MTBE to verify content in preparation for "low <br /> risk" criteria just beginning to surface after Lawrence Livermore/State <br /> water Board Walt Petit memo. <br /> it <br /> IC � <br /> 01/26/96 Wells sampled for MTBE. Later reports shows'non detect at 5.0 ppb. <br /> 04/15/96 Wells sampled again for MTBE. Again, n.on detect. <br /> 05/09/96 MI leaves message on Exxon representative Marla Guensler's phone to <br /> notify that a Closure Report per Appendix B guideline may be submitted to <br /> EHD for evaluation and review. <br /> 09/19/96 Delta submits Site Closure Report. ,> <br /> 09/24/96 MI reviews and accepts Closure Report. iComm' ent letter generated. MI } <br /> prepares site chronology. <br /> .r <br />