Laserfiche WebLink
Ms. Nancy Bishop - 2 - 27 July 1998 <br /> Western Farm Service <br /> 5. In the May report, the log for extraction well EX-1 shows the top of the well screen, which is 49 <br /> feet below ground surface (bgs), is one to five feet below the bottom of the monitoring wells. <br /> Also, a five-foot thick clay, 45 to 50 feet bgs, separates the bottom of the monitoring wells from <br /> the top of the extraction well. Therefore, when water is pumped from the extraction well, water <br /> will be produced from sand units below the clay layer and, if the clay layer is leaky, water from <br /> the sand units above the clay layer. The August 1997 work plan included in the May 1998 <br /> report states monitoring wells were to be used as observation wells during the pumping test. <br /> Your analysis of the pumping test data should address these issues. <br /> As you requested in your 13 July 1998 letter, the deadline for the remedial alternatives report is <br /> hereby extended to 28 August 1998. Please address all the above comments in the remedial alternatives <br /> report. <br /> I will be transferring to another unit in the office on 3 August 1998. Ms. Wendy Wyels is returning to <br /> the Board on 17 August 1998 and will resume oversight of this project. If you have any questions, you <br /> may call me at(916) 255-3082. <br /> DAVID F. STAVAREK <br /> Engineering Geologist <br /> cc: Ms. Carol Oz, San Joaquin County Public Health Services, Environmental Health Division, <br /> Stockton <br /> Mr. Fred Strauss, Western Farm Service, Vernalis <br /> Mr. Frank Fossati, Shell Oil Products, Santa Ana <br /> Ms. Karen Streich, GeoSyntec, Walnut Creek <br /> DFS:kdd:u:\supt\students\18561 L.004 <br />