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� _ I <br /> t �VU/ <br /> Q� <br /> November 11, 1987 <br /> 1$!A <br /> KA <br /> GAS <br /> Ms. Lori Cotulla and Mr. Dan Moe 000 14 <br /> San Joaquin County Health District � "" <br /> 1601 E. Hazelton Avenue <br /> Stockton, Ca 95201 <br /> RE' GROUNDS4ATER ASSESSMENT OF PROPERTY LOCATED AT 724 E. GRANT LINE <br /> h ROAD, TRACY, CA <br /> f� <br /> t Dear Ms. COtulla and Mr. Moe: <br />'. It is my understanding that your agency may be requiring Reynolds & <br /> Brown to install several groundwater monitoring wells at the property <br /> in order to define the extent of benzene contamination in the aquifer. <br /> The request made by Mr. Moe isrbased on the results of a report by <br /> Applied Geosystems indicating the presence of benzene in standing <br /> groundwater upon removal of an underground tank at the subject <br /> property. Following your suggestion, we followed the advice of our <br /> consultants, Atka Terra Technologies, Inc. They suggested resampling <br /> the existinq monitoring well because the groundwater sample collected <br /> by Applied Geosystems was not taken according to protocol established <br /> by the Department of Health Services or the Regional Water Quality <br /> Control Board for collecting of groundwater. The results of resampling <br /> the existing monitorinc well indicated that benzene was not detectable. <br /> > am of the opinion thatappropriate <br /> measures i <br /> i f contami nat i or ;-°x i 5~s, which thefol owingf findings re stateen tothderw se: l <br /> h <br /> 3 . Sc>i 1 samP 1 es analyzed by Applied Geosystems indicated no <br /> c�nt,3mi nrrt i�1�. <br /> 2. The rir .�, ,r�rii Jnr installed and sampled by Kennedy, Jenks <br /> ['hi I rn'i, tl,tlli. ?;. ,,: levels J <br /> of Ix'nzr�ne. (Perx.-Jrt datt�: <br /> San' o v, <br /> , <br /> t <br /> Kr n [ • �' •;.aks X 0A ltnn Wind no detectable levels of tx-nzene in <br /> 43 I,xof tr)luenc in soil . { <br /> 1 • ,l,}1e ro`=a.mpl Ino of tllei' OxisvInq call for Amimene xyene ' <br /> t:nluen(, 'w r1cn1,1 ':' '1'rfllrtr�lrx;iC' ;, indicatetd no detectable levels <br /> of t.hes<- ccull>'xl,uis. <br /> i <br /> 5. The smiv l i nq of the groundwater by Applied Geosystems was E <br /> inappropriate and n r <br /> at according to acceptable protocol. <br /> r.r,lrl l>,. •n. (1n,r , <br /> 415 03 12A <br />� tiuirIitilt .i , <br /> Irlrt,hn n• <br />