Laserfiche WebLink
APPENDIX A <br /> • Page 2 <br /> thick bentonite seal was placed in the well annulus above the filter pack A grout seal consisting <br /> of a Portland Cement and bentonite slurry was tremied into the well annulus above the bentonite <br /> seal Each well was completed with a locking well cap and a flush-mounted, traffic-rated well <br /> Icover As-built well diagrams are presented on Plates 3 through 5 <br /> IMonitoring Well lkyeippmsnt, Purging and lin <br /> EAfter well construction was completed, the water level in each well was measured with an <br /> electronic well sounder and the wells were checked for free product using a clear bailer The <br /> wells were subsequently developed Using a vented surge block Approximately three well <br /> volumes of water were then removed by hand bailing until temperature, pH and conductivity <br /> readings stabilized and/or the water cleared of sediment After a minimum of 24 hours from the <br /> time of development, the water level in each well was measured, and the water checked for <br /> visual signs of free product using a clear bailer Approximately three to five additional well <br /> volumes of water were purged using a clean bailer until temperature, pH, and conductivity <br /> readings stabilized and/or the water cleared of sediment The water samples were then collected <br /> using new polyethylene disposable bailers Water from the bailers was decanted into appropriate <br /> sample containers provided by the laboratory <br /> The samples were immediate/ laced in an ice-chest with ice aloe with <br /> Y P g a travel a el blank, and <br /> submitted under chain-of-custody to a California-certified laboratory for analysis of Total <br /> Petroleum Hydrocarbons (TPH) using EPA method 8015, and Benzene, Toluene, Ethylbenzene <br /> and Total Xylenes (BTEX) using EPA method 602 The travel blank provided by the laboratory <br /> also was analyzed for TPH and BTEX <br /> Equipment was cleaned prior to development and purging of each well with a solution of <br /> trisodium phosphate and distilled water to minimize the potential for cross contamination. All <br /> i water removed during development and purging operations was stored in sealed, labeled 55- <br /> gallon drums <br /> INK <br /> Recy&dPaW WALLACE-KUHL <br /> &ASSOCIATES INC <br />