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• CL/N CLT 1ON s <br /> The water table elevations on this site continue to fluctuate Concentrations of TPHg have continued <br /> fluctuating in the shallow wells with the rise and fall of the groundwater elevation(See contour map of <br /> Max TPHg levels attached) The groundwater gradient was to the northeast for this event, a change <br /> from the previous event The last event had a hydraulic gradient to the west, which was a complete <br /> nl +l.n hen+.+ +rn.+f�n Tl, ..+l.nf7 rn+�f.fls+. n1 Clf+w di wnn4•on l+may" <br /> o cl.�&d tl�# <br /> i ve.-Sa va uiti[auawric+iaaua r u. vr�+u�ausu a ciivati, cauu�uE3iva: uvv� iii vcivia Lc III ay an.vvawauu�as u c <br /> when the groundwater elevation raises, the gradient changes from westerly to easterly <br /> RECOMMENDATIONS <br /> The work plan under construction should address many concerns <br /> �about the scope of the investigation of <br /> both 1 `1_T7C A marl i{ [a �itlivr L'f►vn.Aias te✓ Recs'i'.ltC fivii± uiie CPT i:'vili iudiw~f[na�ed i�'[it tlie1,�_DC A <br /> yµa ,[.i ys�[a 4LL4 ie[a.r Jr7 <br /> contamination has reached the middle of the building and is moving to the west (see contour map of <br /> Max Levels of 1,2-DCA attached) It is recommended that the site continue to be monitored on a <br /> quarterly basis The installation of proposed MW#1D and MW#10S&MW#10D should begin as soon <br /> as possible <br /> r:ORn Uq PROGRESS <br /> Quarterly monitoring of the existing monitoring wells continues Preapproval of the work plan for <br /> installation of five CPT's and three monitoring wells has been approved by the UST Fund,and the CPT's <br /> have been installed The installation of the three monitoring wells is in the planning stage <br /> Reimbursement for soil removal was requested for preapproval,but has not been approved by the UST <br /> Fund <br /> Please contact Ervin Rifenburg of this office if you have any questions on these reports <br /> T' - r_ a a >_ <br /> .muspec.tiully submitted, <br /> It Ne 14r <br /> Footh ne �Uy� r: h <br /> 197 ' <br /> e <br /> t.l Viil ItllGl U 81 rr, GC <br /> Attachments Water Analysis Report,Del-Tech Report, Site Map, Water Sample Analysis Recap <br /> Concentration Contours of 1,2-DCA& TPHg <br /> vG shelduci Hec'K licui,COLUle,111,11410I01 T nuc&%.,u chic L'Upy <br /> Kama Hamgfeld 2291 W March Lane Suite B 100 Stockton CA 95207 one copy <br /> . James Barton,RWQCB California Regional Water Quality Control Board <br /> 3443 Routier Road Suite A Sacramento, CA 95827-3003 one copy <br />