Laserfiche WebLink
particles. The method is also effective in removing accumulated sediment from the bottom of a <br /> well before initiating surging or jetting activity. <br /> When using a foot valve pump in conjunction with surging or jetting, the sediment in the <br /> bottom of the well should be removed before initiating surging or jetting activities. Install the <br /> foot valve pump so that the lower end of the unit (the valve end) is at the bottom of the well. <br /> Commence pumping by rapidly raising and lowering the discharge line. As the line fills with <br /> water, its weight will increase. For shallow wells, this operation of the pump can be <br /> accomplished manually. For deep wells, the weight of the discharge line will require a <br /> mechanical means of raising and lowering the unit. Such mechanical devices typically consist of <br /> a specially made jack handle or a commercially made apparatus. <br /> Once the initial pumping effort begins to produce water, pumping should continue until the <br /> discharge water is clear. <br /> Surging or jetting is conducted, followed by another episode of foot valve pumping. This <br /> sequence of steps shall be repeated until the capacity of the well and the clarity of the water <br /> cease to increase. <br /> B.15.6.6. Precision and Bias <br /> This standard practice presents guidelines for maintaining high-quality monitoring well <br /> installations. Therefore, statements regarding precision and bias are not applicable, except in <br /> the context of such statements that might be included in Section B.7, "Standard Test Method <br /> for the Measurement of Water Levels in Groundwater Monitoring Wells." <br /> B.15.6.7. Quality Assurance <br /> To maintain QC standards, the Water Levels and Field Data Sheet must be completed for each <br /> well that undergoes inspection and maintenance. The checklist and data sheet must be signed <br /> by the service technician completing the forms. Any discrepancies should be corrected by the <br /> well-maintenance supervisor. The checklist and data sheet should be filed in the project files. <br /> Daub &Associates, Inc. Page B-41 Natural Soda LLC 2022 SAP <br />