Laserfiche WebLink
I <br /> Mr. 11,C. Will-or Y <br /> February 23. 1998 f <br /> Page 6 <br /> I <br /> 'fable 1. Approximate Difference Between Sialic :ruttndewaler Levels <br /> in Municipal Well 12 and Monitoring ell W4 ;; t <br /> J , <br /> } Approximate depth froT i grade to <br /> static grottndwate feet <br /> 1, <br /> Approximate ; <br /> Date measured Municipal Well 12 Mon itoring Well W-4 Difference . <br /> September 30, 1987 58.2 55.6 2.6 3 <br /> 3.1 <br /> ,w October 6, 1987 58.8 55.7 � <br /> October 13, 1987 58.7 55.8 2.9 , <br /> October 20, 1987 54.0 55.7 -1.7 . <br /> October 27, 1987 56.7 55.6 1.1 <br /> November 2, 1987 57.2 55.7 , 1`5 <br /> 54.7 55.2 -0.5 <br /> November 25, 1987 Y i <br /> December l 1, 1987 54.9 54.8 0.1 <br /> December 30, 1987 54.2 54.4 -0.3 { <br /> February 2, 198F 53.0 53.1 -O.l <br /> 5 <br /> 1 Static groundwater in Well 12 is about 3 feet deeper tha I static groundwater In Well W-4 <br /> in the late summer and early fall- In winter static rater in the wo wells is at §. <br /> about the same depth. Nearby municipal and agricul pumping may lower the water <br /> ". level elevation in the deeper aquifer, from which Wel4ifer. <br /> draws. However, this pumping <br /> may not affect the upperrrtost shallow aqlwhich the monitoring wells, <br /> particularly Well WA, draw. This is based on a llmited tgstount of data, but may suggest <br /> some separation between the deep and the shallow aquifers uridnlying Well 12. <br /> Soil and Groundwaler(duality <br /> Selected subsurface soil samples from tike two botehol drilled inANgovember 1987 were <br /> hod <br /> analyzed for fuel characteri0 ion by U.S. Environmental 11 A 8 �Met the <br /> 8015, Modified: and bentenr, toluene, and xylene (B by Method <br /> California Department of Health Services (DHS) certified Eureka laboratories in Sacramento- <br /> Total fuel hydrocarbons and BTX were not identiffix in four soil samples analyzed. <br /> Laboratory reports arc shown in Exhibit C. <br /> Groundwater samples from monitoring Wella W-1 t gh W-8 were collected by BC <br /> pergannel on Novemboer 13. 1987. Groundwater tatmpl wen analyzed for BTX (EPA <br /> Method 602) and-- fuel characterization (1dpA Method 8015, Modified). Results are <br /> summarized in Tahle 2 tend laboratory reports ane shown In Exhibit D. Beazenc c6ncentrs- <br /> - tiaras. in samples ftrnn Wells W-1, W-2, W-3, Wim. send -S exp DHS action levels for f <br /> drinking water. Toluene and xylene concenttntiosta ant DHS action levels for drinking <br /> water in Wells W-1. W-2. wed W-3. No action levels l ve been establisited for total fuel <br /> hydrocarbons.. <br /> BROWN AND CALDWELL <br /> , _-••• ., �Iflfl r'i1A.11•IIM1 f�'15111f!1'/.1•i.A1:Y .. <br /> it <br />