Laserfiche WebLink
GeologicafTe wws Inc Page 2 <br /> Groundwater Monitoring Report <br /> L Project No 770 2 <br /> September 18,2000 <br /> A groundwater gradient was calculated for the August 2000 groundwater monitoring event <br /> and found to be flowing S I YE at 0 0002 ft/ft Groundwater elevation and gradient data is <br /> summarized in Table 1, Appendix A Gradient direction is shown on Figure 2 Gradient <br /> Map <br /> 1.2 Groundwater Sampling Procedure <br /> On August 28, 2000 Don Light of Del-Tech mobilized to the site to conduct groundwater <br /> ' monitoring of the four existing monitoring wells and three new wells on site <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 % inch tubing Purging 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 volume 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 /> identified and labeled with a unique designation, inserted into foam holders and placed in an <br /> ' ice chest 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 collect <br /> 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 from 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 />' Groundwater monitoring field logs are included in Appendix C <br />� 'i i <br />