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p.L <br /> Apr 08 05 10:08a Is • <br /> Control Board <br /> California - <br /> ' ornia Regional Water Quality a f. <br /> Central Valley Region Arnold <br /> Robert Schneider,Chair Schwarzenegg" <br /> Governor <br /> Alan C.Lloyd,Ph.D. Sacramento Main Office <br /> ,agency secretary 11020 Sun Center Drive(1200,Rancho Cordova,California 95670-6114 <br /> Phone(9 16)464-3291.FAX(9 16)464.4645 <br /> http',Uwww.w aterboards.ca.govt centralval ley <br /> 7 April 2005 <br /> Mr.Richard Aschieris <br /> port of Stockton <br /> P.O.Box 2089 <br /> Stockton,CA 95201 <br /> CONDITIONAL APPRO <br /> OVAL OF THE GROUNDWATER MONITORCO YTYW ORKP"VI <br /> WEST COMPLEX PROJECT,PORT OF STOCKTON,SAN JOAQ r the addendum, <br /> round-water monitoring wells around the <br /> have reviewed your Groundwater Monitoring Program <br /> of gJork Plan(Vv orkplan) an <br /> We ha prepared once to <br /> site. The workplan was re ared in resp <br /> dated 5 April 2005- which describes a propose network Rs Order No. R5-2004-0137,Provision <br /> Roberts Island I DredgeMaterial ste Discharge Requirements (WD } <br /> requirements set fort <br /> No. G.6 and Attachment E. proceed is given <br /> Based upon our review of the workplan and the addendum,conditional approval to <br /> Bas p <br /> provided the workplan is modified to address the items listed below: will also be installed <br /> The workplan states,in part that, "At the proposed locations, monitor wel s <br /> above the sandy aquifer." The goal of the <br /> 1. <br /> in the peat layer, which is anticipated toe uppermost groundwater. Therefore,the monitoring <br /> monitoring well network is to monitor the d to sample <br /> mple the uppermost groundwater,which may or <br /> wells must be designed and constructe <br /> may not be within the peat layer. <br /> The screen length for the monitoring wells is not specified in the lWorkplan. The screen length <br /> 2' site-specific conditions will al <br /> must be as short as the site-sp <br /> Monitoring to determine potential impacts to the groundwatergradient from flood Staff believes that the shallow <br /> ion of <br /> 3_ Mona g <br /> agricultural fields should need co-ordinate with field irrigation. <br /> groundwater gradient may shift in response to irrigatione-V trans toff is interested in determining <br /> the groundwater gradient at the D1�ID site and not tracking <br /> The alt <br /> ernate background monitoring well,MNY-8b, shown on Figure 5 is questionable given the osed <br /> reported groundwater gradients near the DMD site,o There endave thatban alternate to at oeen time periods n f needed, be <br /> the prop <br /> location is down gradient of the DMD site. e rec <br /> proposed MW-8a <br /> selected as close as possible to the <br /> California Environmental Protection Agency <br /> Recycled Paper <br />