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Work Plan For Soil Boring and Monitoring Well Installation,City of Ripon/Madsen Sunrise Dairy,Ripon,California <br /> December 2,2010 <br /> A groundwater monitoring well will be installed at the location shown on Figure 2. The well <br /> boring is located downgradient of soil sample TW-13 based on groundwater contour maps <br /> generated for the nearby Nestle U.S.A. site assessment project. Several Nestle U.S.A. <br /> groundwater monitoring wells used in the groundwater contour maps are present in the vicinity of <br /> the subject site(Nestle U.S.A. data obtained from the SWRC13 GeoTracker website). <br /> The monitoring well will be constructed of 2-inch-diameter schedule 40 polyvinyl chloride(PVC) <br /> well casing and 0.02-inch machine-slotted well screen. The proposed total depth of the well <br /> boring will be 39 feet bgs with a screened interval extending from 24 to 39 feet bgs. It is <br /> anticipated that groundwater will be encountered at 29 feet bgs during drilling activities. <br /> Proposed well construction details are shown on Figure 3. <br /> Soil samples for description and chemical analysis will be obtained from the borings at a <br /> minimum of 5 foot intervals and will be collected with a split-spoon sampler fitted with clean <br /> brass sample rings. The soil samples will be handled in accordance with GR Field Methods and <br /> Procedures (Appendix A). <br /> Soil from each sampled interval will be screened in the field for the presence of volatile organic <br /> compounds using a photoionization detector (PID). These data will be collected for <br /> reconnaissance purposes only, and will not be used as verification of the presence or absence of <br /> petroleum hydrocarbons. <br /> Drill cuttings will be stockpiled at the site pending receipt of chemical analytical data. The drill <br /> cuttings will be stockpiled on and covered with plastic sheeting pending disposal. Four samples <br /> of the drill cuttings will be collected for disposal characterization. These samples will be <br /> submitted to the laboratory for compositing into one sample, and then analyzed as described in <br /> Task 5. <br /> Task 3. Wellhead Survey <br /> Following installation of the monitoring well, a California-licensed surveyor will measure the <br /> elevation of the well casing relative to mean sea level. The horizontal coordinates of the well <br /> (including latitude and longitude by GPS)will also be obtained at this time. <br /> Task 4. Well Development and Sampling <br /> GR will develop the newly installed monitoring well after it has been allowed to stand a <br /> minimum of 72 hours following installation. GR will return to the site a minimum of 48 hours <br /> after the well development, to collect a groundwater sample from the well to be analyzed as <br /> described in Task 5. Groundwater removed from the well during development and sampling will <br /> be stored on-site in DOT approved, 55-gallon drums pending proper disposal. <br /> 4 <br />