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Sent by: ODAA1SJUA EPU 209 468 9784; 11116!99 1 :15PM;jgL&&_#345;Page 13119 <br /> MTBF detections that out of 9 years of continuous monitoring,we're talking about in time and <br /> space sporadic hits that came and go,so you-can get a hit in the well,one of these Iow hits in the <br /> well this quarter,in a prior quarter you.might not of had any. in the following quarter you might <br /> not of had any. <br /> MS.FORESTER: And then I had another question. Um l.have well connected,I think at what I <br /> was trying to formulate as a question is,don't you believe that um the areas that might be near <br /> drinking water wells,don't you think that they're hydraulically connected under the ground so <br /> that the case where the woman from the Envirownental Health San Joaquin was trying,to say <br /> there aro drinking waters near them in your expertise are you trying to say there's no possibility <br /> that this would move into a drinking water well? <br /> DIL CULLEN: WW I'm trying to say is that in a in a lateral there's a 3 dimensional system,so <br /> things can move out sideways and then they have the possibility ctifmoving vertically under the <br /> right conditions. What I'm saying is that the process of natural microbial degradation of the <br /> benzene,the most mobile of these cornpounds,.that's why we are talk..ing mostly about it,cause it <br /> moves ahead of everything else mostly cause it's the most soluble. That the process of microbial <br /> degradation is faster than the rate of movement outwards,so that the effiect.of that is that the <br /> plume the edge of the plume stops so that'laterally it will not rove out. We are seeing the same <br /> kind of data in the vertical direction,tram wtic attenuation with distance and we as yoo can see <br /> on Exhibit C:and D we also have biogeochernical.data which if you are getting degradation by <br /> microbial mechanisms,what you'd expect to see is a reduction in nitrate as they use nitrate for as <br /> 12 <br />