Laserfiche WebLink
STE Project No. 4001-001 <br /> Page 9 <br /> 4.0 QUALITY ASSURANCE/QUALITY CONTROL <br /> Monitoring wells 6 through 13 were purged and sampled using a <br /> new, sanitary, disposable bailer at all sampling points. <br /> Extraction well EW-1 was purged with a 4" electric <br /> submersible pump and sampled using a new, sanitary, <br />' disposable bailer. <br /> The depth to water was measured prior to sampling each <br /> monitoring well . Each well was then purged of a minimum of <br /> three well volumes, or until the temperature, conductivity <br /> and PH parameters had stabilized (Appendix B) . The wells <br /> were then allowed to recover to within 90% of their original <br /> water levels prior to sampling. <br />' Purge water from the sampling activities is currently being <br /> stored on-site, in metal drums, for later treatment and/or <br /> disposal. <br /> The samples were carefully poured from the disposable bailer, <br /> into clean glass VOAIS provided by the laboratory. Care was <br /> taken to ensure that no air space existed in the vials , by <br /> inverting to check for bubbles. <br /> The samples were immediately placed on iced storage for <br /> delivery to Geokem Mobile Labs, 2000 Temperate Avenue, <br /> Modesto, California. The samples were under no circumstances <br /> opened by anyone other than qualified laboratory personnel. <br /> The samples were analyzed within the sample life-span limits <br /> as set forth by EPA guidelines for the specific tests to be <br /> run. <br />' The groundwater samples were analyzed by a California certified <br /> laboratory (Geokem Mobile Labs) for 601, 602, EDB, STLC-Pb, and <br /> TPH as gasoline. <br />' 5.0 REMARKS AND SIGNATURES <br /> This Groundwater Monitoring Report has been prepared using <br />' standard industry practices and was written in strict <br /> accordance with Regional Board guidelines . <br /> SUN TECH is not responsible for undisclosed site information or <br />' conditions, or the quality of work performed or manifested by <br /> other firms, that is included in or attached to this report. <br /> If you have any questions regarding the information provided, <br /> you may contact our Modesto office at ( 209 ) 576-7182. <br />