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Page 3 of 4 <br /> Begin forwarded message: <br /> From: AD <ad desx z.com> <br /> Date: September 7, 2014 5:49:36 PM PDT <br /> To: Greg <sld �, DESxyz com> <br /> Subject: Caltank Mtg Agenda <br /> Greg, <br /> Proposed Agenda is to summarize the key <br /> 1-2014 Re <br /> Joaquin County EHD (Vicki and Nuel) such for feedback and coonort with the San <br /> cun'ence on the <br /> investigation concept and moving forward to a cleanup strate . <br /> g3' <br /> 1) The Q 1-2014 Report updated the Site's groundwater enigma Fi <br /> combined groundwater data (Fig 4) with the adjacent site <br /> ells <br /> for a combined flow over a wider area with more w g ( g 3) by using the <br /> (Fig 5). <br /> 2) The updated Groundwater plan then enabled a reference basis <br /> Site to narrow the previously historical wide variation in the Site' <br /> typical seasonal hydraulic cycle and consistent With with the Adjacent <br /> more s groundwater to a <br /> groundwater flow. (Fig 5 to Fig 11). The most recent groundwater cent Site's <br /> 2014) shows an added dynamic due to the Adjacent Site's dewatering.an(Fig 5_ Q 1_ <br /> rmg. <br /> 3) Co-GW monitoring was recommended and accepted for the m <br /> benefit of both Site parties and our co ore accurate mutual <br /> mmon 4Q-2014 is the start of the co-monitoring a engency leadership. <br /> 4) The Q 1-2014 Report updated the Site's geologyFi <br /> the CPT data instead of the widely different manual geologic descriptions <br /> and by cross referencing the Site Geology with the (e Adjacent Site Cross sg 2, Fig by relying primarily on <br /> update eliminated detail confusion and stylized the e grossections.by others <br /> for targeting cleanup of sand-based contamination pathwa gologfor more useful planning <br /> s. This <br /> pathways. <br /> 5) Contamination smear zone tie with the underground litholo <br /> fluctuations was re-assesed using a lithology tied to residual saturations <br /> petroleum hydrocarbon type � and groundwater <br /> cross section in order to mode�approXimately waste on turations tied to <br /> lateral and vertical extent. The groundwater ) incremental depth <br /> primary product smear zone's <br /> better assess the down gradient contamination migration)flow ons d re superimposed to <br /> 15 to Fig 25. direction. Refer to Fig <br /> 6) Thus the combined product plume Fig 26 was a composite of <br /> waste oil product, submerged and unsubmerged was influenced b the <br /> groundwater flow direction, which had no well control t gasoline, diesel and <br /> the product, which is the significant control gap to complete Y site's NE <br /> o prove the lateral extent of <br /> move forward to cleanup. p to the investigation and to <br /> 7) The minimum of two proposed monitoring wells DW6 and DW7 were proposed <br /> for real time current migration of the product instead of relyingon <br /> out dated <br /> 9/11/2014 <br />