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• • Page 5 of 8 From: umezaki, clave [mailto:dumezaki@EKICONSULT.COM] Sent: Thursday, September 15, 2005 11:13 AM To: Mike Infurna [EH] Cc: jlfio@hydrofocus.com; tarantino, steve; ggibson@ci.lathrop.ca.us Subject: RE: Well Maps [Item 3 of 3] Mike, We can talk further about this next week. I'm guessing that this might be too much information for your purposes, i.e., you may or may not care what Regional Board permit each well is connected to - maybe all you care about is who the responsible party is for each well, how and when it was constructed, how and when it's going to be destroyed, etc. But again,we can discuss next week. --Dave Umezaki, EKI From: Gregory Gibson [mailto:ggibson@ci.lathrop.ca.us] Sent: Thursday, September 15, 2005 11:03 AM To: umezaki, dave; Mike Infurna [EH] Cc: jlfio@hydrofocus.com; tarantino, steve; Cary Keaten; jzilles@kleinfelder.com Subject: RE: Well Maps [Item 3 of 3] Dave & Mike: My understanding is that any of the wells on the former'Reiter'property (which I think was formerly owned by Laro Iron& Coal and has been bought by PUH and transferred to the City) or elsewhere that are part of the monitoring well network for the Waste Discharge Requirements for the WRP-1 plant are ultimately under the responsibility of the City. The Pond'D' wells located on the former Nurisso'property were also referred to as 'Reiter'property wells in the RWQCB permit, and this is a potential source of confusion. It is probably best to refer to the Reiter wells as the 'Pond F wells and the Nurisso wells as the 'Pond D' wells. However, these ponds will be renamed in the new ROWD that is being submitted the RWQCB on behalf of the City for the 5 year plan. When we get the new permit we should switch to the new nomenclature for these wells. However, in the short term I think it would probably help Mike to put all the wells under the current wastewater permit's monitoring well under one file for the City of Lathrop WRP-1 Stage I expansion, and similarly organize the Stage I1 expansion wells under a separate file. Perhaps Dave could help Mike sort out which wells belong to each permit. The California Natural Products or other'private'monitoring wells that are not part of the network as described in the City's approved Monitoring Well Installation Workplan are under the responsibility of that owner/entity. Gregory W. Gibson, PE Associate Engineer City of Lathrop - Public Works Department 9/21/2005