Laserfiche WebLink
L <br /> Beacon Station No 641 July 27, 1998 <br /> Stockton. Califomia Groundwater r <br /> Results <br /> Water-level data collected on June 10, 1998 was used to construct the Groundwater Contour <br /> Map (Figure 2) The average depth-to-water for the monitoring wells was approximately 46 <br /> feet Water levels have increased approximately 3 feet since wells MW-1 through MW-5 <br /> were measured on March 31, 1998 The groundwater surface is relatively flat, but has a <br /> general trend toward the northwest at a magnitude of 0 0011, similar to the March 31, 1998 <br /> northwesterly gradient direction with a magnitude of 0 0013 <br /> Detectable concentrations of benzene were measured in water samples collected from <br /> monitonng wells MW-2, MW-4, and MW-5 at concentrations between 6 0 parts per billion <br /> (ppb) and 510 ppb, —A Benzene Concentration Map was constructed for the June 10, 1998 <br /> data (Figure 3) Dissolved benzene concentrations have decreased in all of the monitoring <br /> wells since the March 1998 sampling event <br /> Distribution <br /> A copy of this report should be forwarded to <br /> Mr Michael Infurria Jr <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> P O Box 388 <br /> Stockton, California 95201-0388 <br /> Mr Gordon Boggs <br /> Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, California 95827-3098 <br /> 641 gmr98 q2 <br /> Job No 164141 2 HORIZON ENVIRONMENTAL INC. <br />