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t <br /> a: <br /> c� <br /> Golden Grain Company <br /> January 11 , 1989 <br /> 202/799-5045.01 <br /> 18 ,- � ahead of the <br /> at 5--foot <br /> ,ampler would be clr-�`�e5 would be 5c-eened in the field using a <br /> intervals. The same ed, labe.jed, <br /> toionixation detector; , <br /> then they would be cape <br /> phaendix VIII for more <br /> and Placed on ice. See SOPS 14 and 15 in APP <br /> soil sampling Procedures. <br /> detail regarding <br /> LABORATORy ANALYSES OF SOILS <br /> Each selected sample would be analyzed at GTEL for <br /> petroleum hydrocarbons (TPH) as gasoline, <br /> concentrations of fatal P and xylene (BTEX) using EPA <br /> and benzene, toluene, ethylber.zene, for <br /> The samples would also be analyzed <br /> Methods 5030/801518020. endix VII and for Ethylene <br /> organic lead as described in ApP and <br /> Dibromide (EDB) using Epp. Method 504 or Gas Chromatography <br /> Electron Capture Detector (GC/ECD) . <br /> 140NITORING WELL CONSTRUCTION . <br /> inch PVC, 0.020-such <br /> The wells would be constructed monitoring wells would <br /> I slotted screen and blank casing. 12, <br /> with screened <br /> be installed at Proposed locations 10 and laced in <br /> 30 feet {Figure 6) . Sand would be P <br /> casing from 10 to g to a depth of B feet. A <br /> the annular space around the casin <br /> bentonite seal followed by <br /> cement grout to the sure-ace would seal <br /> A traffic-rated street box would be installed to <br /> the well. lacking caps. <br /> grade, and the wells fitted with , <br /> 1I, 13, 14, and 15, nests of twc <br /> At proposed locations 9, <br /> wells each could be installed with differ�e <br /> . The deeper well would be nedcfromeaintervals <br /> hebottom Jof <br /> (Figure 7) laced in the <br /> the clay confining layer to 50 feet, Sand would be then a <br /> annular opening uF to � <br /> the bottom of the clay layer, <br /> 16 <br />