Laserfiche WebLink
eofo icafTechn <br /> G g us Inc Page 2 <br /> Groundwater Monitoring Report <br /> Project No 7702 <br /> w January 30, 2001 <br /> December 29, 2000 averaged —32 69 feet below MSL (-57 feet bgs) This represents an <br /> increase of 0 93 feet since the August 2000 monitoring event <br /> A groundwater gradient was calculated for the December 2000 groundwater monitoring <br /> event and found to be flowing N47°E at 0 0003 ft/ft Groundwater elevation and gradient <br /> ' data is summarized in Table 1, Appendix A Gradient direction is shown on Figure 2 <br /> Gradient Map The historical gradients are illustrated in Figure 3 Groundwater Gradient <br /> Rose Diagram <br /> ' <br /> 12 Groundwater g <br /> SamP lin Procedure <br /> On December 29, 2000 Don Light of Del-Tech mobilized to the site to conduct groundwater <br /> monitoring of the seven monitoring wells <br /> Before sampling was attempted the wells were sounded for depth to water and then a clear <br /> disposable bailer was used to determine if floating product was present The wells were <br /> ' purged of at least three well volumes of stagnant water using a dedicated Waterra check-ball <br /> assembly and '/2 inch tubing Puiging continued until the temperature, conductivity, and pH <br /> of the groundwater stabilized (<10% variation between three readings) indicating that <br /> formation water representative of aquifer conditions was entering the wells These water <br /> quality parameters were measured at intervals of each well volurne purged <br /> Once purging was complete, a water sample was collected from the Waterra tube Care was <br /> taken to minimize sample agitation Once the sample container was filled and capped, the <br /> bottle was inverted, tapped, and checked for headspace bubbles The sample container was <br /> 1 identified and labeled with a unique designation, inserted into foam holders and placed in an <br /> ice (,hest cooled to 4°C for transport to the laboratory <br /> All non-disposable sampling equipment was decontaminated using a hot water washer and <br /> detergent before and between uses Disposable gloves were used by the technician to <br /> ' collect all samples and were changed with each sample collection <br /> A chain of custody document, listing all samples collected, accompanied the samples from <br /> field to laboratory, thereby providing a means to track their movement and insure their <br /> integrity <br /> ' All water purged froin each monitoring well and not used as a sample, was placed in a 55 <br /> gallon DOT approved container, properly labeled and stored on site until its proper <br /> disposition can be arranged <br /> Gioundwater monitoring field logs are included in Appendix C <br />