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GROUNDWATER <br /> ❑❑ TECHNOLOGY, INC. 4057 Port Chicago Highway Concord CA 94520(415)671-2387 <br /> FAX (415)685-9148 <br /> PA WEE 1 A <br /> August 19, 1993 RECEIVEE) <br /> Project No 020702819gp A OA ,2 o f993 <br /> WN <br /> Mr Harlin Knoll FNVIRONMFH QNrA - -1 SERVICES <br /> San Joaquin County Public Health Services tAz Th DIVISION <br /> i 445 N San Joaquin Street <br /> Stockton, CA 95201 <br /> 1ti Subject Work Plan for Manna Pro Facility <br /> 4004 S EI Dorado, Stockton, California <br /> t <br /> Dear Mr Knoll <br /> On June 22, 1993, Groundwater Technology conducted prellminali;y step4roodown test$ on We Do <br /> MW-1, MW-2, and MW-6 to determine the appropriate pumping rate for 8 t?�tii-rate aqu#fer est The N <br /> results of the tests were inconclusive Well MW-1 pumped dry within. 10 man 'ss at 10 gpr , ani waiter <br /> levels would not stabilize at 1/2 gpm Water levels did not stabilize durtrumping C4,wQUAW-6$i <br /> r gpm The results of the step-drawdown test on well MW-2 showed,*at tlxt Utff pfn - r <br /> would be less than 3/4 gpm <br /> Due to the fact that initial aquifer tests were inconclusive, Groundwatet�-Teckno1 recq"- *Qdegj,..�3 <br /> the following work to complete the aquifer tests and determine,the feasibilo of <br /> cleanup techniques Accordingly, Groundwater Technology requests your rira 114 ancilr4ppi*00 of`#* <br /> following work steps including approval of the enclosed permit application for ars extraction well and 3 a r <br /> monitoring pants A check for$89 00 to cover permit fees to the San Joaquin County Public Health <br /> Services (PHS) is included as an attachment to this letter <br /> b <br /> Extraction.Well Installation One 4-inch diameter extract[oO#ve#Av!# bel FS ,��, <br /> r R <br /> auger drilling techniques Tlib-well W*1561acete as shovei^ ,a��tlt 1 13-hir#f z <br /> diameter pilot borehole will be drilled and contlnuously logS may bo <br /> collected from the borehole and submitted for laboratory anilys"s 6r}STE�, <br /> as-diesel The samples will be selected based on Iithology and fieldyeex ',- <br /> detector (PID) The borehole would be redrilled with 10 25-1r1b dlanfftr#4Wr& E *xmftdSon , <br /> Well construction details are illustrated in Figure 2, Attachme,01 #a <br /> Offices throughout the U 5 Canada and Overseas <br />