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I <br /> Mike Infurna [EH] <br /> From: Mike Infurna [EH] <br /> Sent: Wednesday, November 16, 2011 8:05 AM <br /> To: Nuel Henderson [EH] <br /> Subject: FW: Olivarez - <br /> Fyi. <br /> From: Michael Vlach [mailto:michaelviach@comcast.net] <br /> Sent: Wednesday, November 16, 20117:55 AM <br /> To: Mike Infurna [EH] <br /> Subject: RE: Olivarez <br /> Mike- Thanks for the reply. <br /> The data illustrates that natural attenuation is happening in the groundwater. The requirement is that it be <br /> cleaned up before someone tries to use it for beneficial uses. I am under the impression that the State has <br /> recognized that there is an infinite amount of time for mother nature to finish the clean up, because the City of <br /> Stockton development laws and the permanent record created by GeoTracker will prevent anyone from using <br /> this water as a beneficial use. Thus allowing closure for almost any declining concentration or small leading <br /> edge concentration, were existing wells are not threatened. <br /> 1).At the meeting on 8/4/11 Nuel wasn't concerned with the offsite concentrations, as if to concur with the <br /> above. The leading edge (oxygen front) illustrated by MW-10&11 the 1,2-DCA is holding below 20ug/L. <br /> 2).The EW-1 spike is expected after pump shut down. For approximately 9 months the pump maintained a <br /> dynamic steady state cone of depression. The upstream water has become cleaned up. Since half the water <br /> comes from downstream and half from upstream we are seeing a 50%dilution during the dynamic steady state <br /> sampling. The data shows that the concentration has been cut in half from 200,000ug/L TPHg to 100,000ug/L <br /> TPHg with a declining trend. <br /> 3).The fund will only reimburse for actions approved by the EHD. The fund considers all of my actions elective <br /> and non-reimbursable no matter what the result. I will need approval of the bio-reactor in order to augment the <br /> GAC filters. <br /> Thanks for your considerations. Let me know what Nuel is thinking. <br /> -Mike Vlach <br /> From: Mike Infurna [EH] [mailto:MInfurna@sjeehd.com] <br /> Sent: Tuesday, November 15, 20114:30 PM <br /> To: michaelviach@comcast.net <br /> Subject: FW: Olivarez <br /> Dike, <br /> I brought the quarterly report with me to a site and I got a chance to read it. <br /> I do not support a closure for this site at this time for the following reasons: <br /> 1- upward tread in DCA in MW-1g and MW-11 (offsite down-gradient Wells) <br /> 11271X}12 <br />