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0 0 <br /> 5. Soil Cuttings Characterization and Disposal <br /> All soil cuttings will be collected in a 20-yard roll-off bin lined with visqueen. Three <br /> grab samples of the soil cuttings will be collected from the roll-off bin in 250-milliliter <br /> glass jars and sent to a California certified analytical laboratory to be analyzed for Title <br /> 22 California Code of Regulations (CCR) metals using inductively coupled plasma— <br /> mass spectrometry. The analytical results will be provided to the receiving facility of the <br /> material for disposal. Disposal will be handled by IMP Environmental. <br /> 6. Well Development <br /> Well development will commence at least 12 hours after the placement of the annular seal at <br /> each well. Development may consist of a combination of well surging using a surge block, <br /> bailing and/or pumping with a small diameter submersible pump to remove mobile fines, <br /> silts and clays. The process of surging and then bailing or pumping to remove material may <br /> be repeated during development. One day(-8 to 10 hours)of development is scheduled for <br /> the wells. The volume of water removed from each well during development will be <br /> recorded. <br /> Water quality parameters such as pH, specific conductivity,temperature,and turbidity will <br /> be monitored during development. Development will continue until the water quality <br /> parameters have stabilized and turbidity readings have stabilized at or below 10 <br /> nephelometric turbidity units(NTU). With respect to groundwater chemistry, an adequate <br /> purge is achieved when the pH, specific conductivity and temperature of groundwater have <br /> stabilized and the turbidity has either stabilized at or below 10 NTU. Ten NTU is the <br /> maximum goal for most groundwater sampling objectives. This is twice the primary <br /> drinking water standard of 5 NTU(USEPA Field Sampling Guidance Document#1220 <br /> Groundwater Well Sampling USEPA Region 9 Laboratory Rev.#1, Sept. 2004). <br /> Purge water generated during the development phase will be temporarily stored in the <br /> roll-off bin on site. Water will be pumped out of the roll-off bin to a vacuum truck. The <br /> vacuum truck will discharge the water to the on-site treatment system. <br /> 7. Well Surveying <br /> Following well development, the horizontal location and the vertical elevation of the top <br /> of casing and land surface will be surveyed by Varney Land Surveys, a state certified <br /> surveyor. The vertical elevation will be measured to within 1/100 of a foot and will be <br /> referenced to the National Geodetic Vertical Datum of 1929 (NGVD29) and the North <br /> American Vertical Datum of 1988 (NAVD88). The locations of the wells will be <br /> surveyed to the California State Plane Coordinate System Zone 3 referenced to the North <br /> American Datum of 1983 (NAD83). The coordinates will be recorded in feet. <br /> Work Plan—Installation of Monitor Wells 9672 <br /> SPX Corporation 5 Dudek <br /> Stockton,California May 2016 <br />