Laserfiche WebLink
Table 1 Monitoring required by DMG a4ter plug closure <br />(once conditions behind plug stabilize and tracer is injected) <br />ID Measurement Analytical Description Frequency Period Comments <br /> suite z <br />Trench lnle; water sample standard water quality of influent to infiltration quarterly when trench is operating sample collec!ed from edit plug <br /> trench I drain pipe (formerly called <br /> ~ i 9360 Portaq <br />Trench Inlet ~ floe:~ rate I NA infil[ratien trench inlluent rate I monthly t•:hen trench is operating 11o:v measured by recording <br />Flow ! r time required to till calibrated <br /> bucket <br />SP-1 water level NA water level in trench standpipe near monthly t•+hen wench is operating <br /> head of trench <br /> <br />SP-2 <br />evater level <br />NA <br />waver Icvel in trench standpipe near <br />monthly <br />when trench is operating I <br />i <br /> end o1 trench <br />VP-1 evater Level NA water level in vadoso zone monthly when trench is operating monitoring tv il! continue (or 2 <br /> piezometer near SP-1 weeks aher trench operation is <br /> stopped <br />VP-2 v~ater Level NA evater level in vadoso zone monthly when trench is operating monitoring will continue for 2 <br /> piezometer near SP-2 tvccks aher trench operation is <br /> stopped <br />APP pressure NA evater pressure exerted on edit plug monthly 2 years more frequent monitoring it <br /> pressure exceeds 11 psi <br />Visual 1 I <br />visual NA inspection of trench far capacity monthly when trench is operating relief from monitoring may be <br /> ~ exceedance requested:vhen flov.' <br /> r consislentl below 10 apm <br />Visual 2 visual NA possible seepage around edit plug monthly t•+trile plug is accessible, i if seepage observed, (low to be <br /> u to 2 ears ) measured usin weir <br /> i ' <br />Visual 3 visual I NA possible development of seeps near monthly 2 years <br /> artal r <br />L'/GL L"deir (low rate NA f1o:v rata in lower LLSndy Gulch monthly, on-going since April 1998 ( data logger to be used during <br /> continuous l spring 1999 <br /> using data LID t•+as formerly called <br /> j longer ~ L^.rGtP/BI <br />i <br /> <br />