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DDJC-Sharpe Groundwater Mon&g Well Installation Wok Plan Table 1-1. Estimated Well Specifications, MW526 Well Installation, DDJC-Sharpe Estimated Estimat d Estimated Casing Casing Well Slot Length of Well Depth Diameter Material Screen Material Size Well Scr sen MW526A 45 It bgs 2-inch SCH 40 PVC SCH 40 PVC 0.010 10 fee MW526B 75 ft bgs 2-inch SCH 40 PVC SCH 40 PVC 0.010 10 fee MW526C 140 ft bgs 4-inch SCH 80 PVC SCH 80 PVC 0.010 10 fee MW526D 230 It bgs 4-inch SCH 80 PVC SCH 80 PVC 0.010 10 fee " Well specifications are dependent upon the lithology encountered during drilling. ft bgs = below ground surface MW = monitoring well PVC = polyvinylchloride SCH = Schedule • Name of the project and site; • Name and signature of the field geologist preparing the log; and • Boring number; • Name and signature of Califorttia regi tered • Dates drilled; geologist who provided oversight. • Location of the boring; 2.2.2 During the construction of each mo itor- ing well, an as-built diagram of the well will be • Type of drill rig; recorded by the field geologist.Furthermore,a detailed log will be kept during the develo ment • Size and type of drilling method used; of each well. The type of information that shall be included in each of these logs is discussed in • Depth at which groundwater was first the DDJC-Sharpe/Tracy Comprehensive Field encountered; Work Plan Field Procedures(URS,2004a). • Depth to the static water level and changes 2.3 Drilling Requirements in static water level with hole depth; For the proposed A and B Zone monitoring • Total depth of the hole; wells,an 8-to 9-inch-diameter boring will be drilled initially with 4-1/4-inch internal diameter • Depth or location of any problems hollow-stem augers to obtain a continuous core encountered(i.e.,heaving sands); for lithologic logging.Both A and B Zone wells will be constructed within the same borehole • Lithologies of soil layers encountered; using 2-inch-diameter polyvinyl chloride VC) casing(multiple completion well).For the C and • Reference elevation for all depth D Zone monitoring wells,a 10-to 12-inch- measurements; diameter boring will initially be drilled usi rig a mud rotary drilling rig to obtain a continu us • Boring abandonment procedures(if core for lithologic logging. Mud rotary drilling applicable); is preferable over hollow-stem auger drilling at • Name of driller; KAWprocess\00363\sharpe\MW installatlonWINALNW526.doc 3 k ne 2004