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' 13 to well NP-1, this well was not logged or sampled Drilling for MW-10 proceeded from ground surface to a depth of approximately 61 feet bgs using 8-inch, outside diameter, hollow- stem augers Groundwater monitoring well MW-10 was constructed using 2-inch diameter, ' schedule 40 PVC casing The slotted (0 01 inch slot size) section extended from approximately 60 to 50 feet bgs The sand filter pack, consisting of clean #2112 sand, was placed adjacent to the slotted section and extended approximately two feet above it ' Approximately 3 5 feet of bentonite chips was placed above the sand filter pack and hydrated ' The remaining annular seal was filled with a cement/bentonite grout A flush-mounted, traffic- rated well protection(Christy)box was installed at the surface with a watertight, locking cap to preclude tampering An experienced field geologist working under the supervision of a California Registered Geologist maintained the detailed log of activities and collected field data The on- site geologist produced a detailed geologic log of the boring, conducted field analyses of soul samples, and properly packaged and labeled samples for possible laboratory analysis All drilling and sampling equipment was thoroughly cleaned pnor to and following use ' at each drilling location and sample interval The cleaning procedures consisted of steam cleaning or triple-rinse clearing methods The tnple-nnse clearing method employed consisted ' of washing the equipment in potable water with a cleansing solution, rinsing in potable water, ' then rinsing with distilled water All drill cuttings and decontamination water were placed in DOT-approved 55-gallons drums which were labeled and left on-site pending final disposition ' 4.3 LABORATORYANALYSES ' Soil and water samples selected for analysis were provided under proper chan-of- � ' custody protocol to either the on-site, state-certified mobile laboratory(Baseline Laboratories- Certification#2284)provided by BC Laboratories, Inc (BC) located in Bakersfield, California ' or directly to BC(Certification#1186)