|
ueew„ '-"a r ,... _..; ,'- 3..
<br /> -r s ,.n _ ``�- �' .:�-�Y' .n- 5 .. .ro�S, .,' .�.• .. `3' -"was' - '?- .•'.t'�. _. - =a1m�- � .1.+-.-,. �`:? '�,,;.. :� -
<br /> .r.^•
<br /> "`�F� ..W; �..:M-• >eT Y ,+�.�'r"�.
<br /> • .'` ..;cTr�=?Y '' il. 'i : •b .r-. ,�,..' ..�:f2 r '° �';s -y,�.:^+ .,sc c amu' :' y w- a¢�*•r� xc frti .'
<br /> .� .-. .:`; ;, S' vW�i�,4155
<br /> --.21"N.'. ® � ;.`� ~ '�4'S 4, -_4k�n�.'tiPa.mi',•`.' 1r 9 ',: x� R,. ,:�"'-',�L�wr - a�.r-,- ���".w gd,w sl'`,y.+,..Zt-�vnfrne�
<br /> � a�.' �� �h,.,�' ,:��. �•l.,•�V.t°.£.`L�'S '2.�:-`'x, ..,� Yy '�. i ��• w:�m,� .x .� .rte»ani. •
<br /> w
<br /> i
<br /> 3330 Da-Dr-,,t!
<br /> ADelta anct;o Corczov;i.CA 9,567.0
<br /> Environmental I- 91F,G38 3 d5
<br /> Consa ltants,Inc. -i. 5'.?I�1 J-`i FAX 016 638 8385
<br /> March 6, 1992
<br /> Ms. Linda Turkatte
<br /> Department of Environmental Health
<br /> San Joaquin County Public Haalth Services
<br /> P.O. Box 2009
<br /> Stockton, California 95201
<br /> Subject: Quarterly Ground Water Monitoring Report,
<br /> First Quarter 1992
<br /> 620 West Charter Way, Stockton, California
<br /> She:l WIC No. 204-7524-4305
<br /> Delta Projm No. 40-88-586
<br /> Dear Ms.Turkatte:
<br /> Delta Environmental Consultants, Inc. (Delta)has been authorized by Shell Oil Company(Shell)to
<br /> E conduct an investigation of soil and ground water conditions at a Shell service station located at
<br /> 620 West Charter Way, Stockton, California (Figures 1 and 2). The investigation is intended to
<br /> characterize the distribution of petroleum constituents in soil and ground water beneath and adjacent
<br /> tt; the site. This report summarizes quarterly ground water sampling activities performer on
<br /> January 28, 1992.
<br /> Quarterly ground water monitoring included measuring water levels in the 10 existing monitoring
<br /> wells, checking for the presence of free-phase hydrocarbons or hydrocarbon sheen, and collecting
<br /> ground water samples for chemical analysis. All field activities were performed in accordance with
<br /> the procedures described in Enclosure A.
<br /> Wnler-evel Dypth Flow Direction, and Hydraulic Gradient
<br /> Ground water level measurements recorded on January 28, 1992,are compiled;n Table 1,along with
<br /> previous ground water level measurements. On January 28, 1992, depth to ground water in the
<br /> monitoring wells ranged from 31.72 (MW-6) to 38.20 (MW-10) feet below the top of casings.
<br /> Historic ground water elevations in monitoring weirs MW-1, MW-5, MW-6, MW-8,and MW-9r are
<br /> graphically illustrated in Figure 3. The ground water level measurements recorded on
<br /> January 28, 1992, indicates the direction of ground water flow is toward the north with an easterly
<br /> component. The horizontal gradient is approximately 0.02-feel per foot. A water table contour map
<br /> was prepared, using the lantivy 1992 data(Figure 4).
<br /> Delta Delivers 5olaons
<br />
|