Laserfiche WebLink
f <br /> • • .% LEINFELDER ` <br /> June 21,1988 <br /> File- 24-2093-00 <br /> Mr.John Johnson <br /> The Customer Company <br /> P O. Box 886 <br /> Benicia, California 94510 <br /> SUBJECT: Ground Water Sampling <br /> Food & Liquor Store#76 <br /> Manteca, California <br /> Dear Mr Johnson <br /> Enclosed are the analytical results of the ground water samples collected on May 27, 1988, <br /> at Food & Liquor Store #76, 890 North Main Street, Manteca, California (Plate 1) The <br /> samples were collected from monitoring wells MW-1, MW-2 and MW-3 and analyzed for <br /> • total petroleum hydrocarbons (TPH) extractable by GC-FID, and benzene, toluene, ethN 1 <br /> benzene and xylene (BTEX) by EPA Method 602 Table I lists the sample numbers, <br /> sample locations, and analytical results Analytical results of these samples indicate <br /> petroleum hydrocarbons are not present in the ground water. <br /> Ground water samples were collected with a teflon bailer after five well volumes were <br /> purged from each well (refer to Table II for a list of the monitoring well purge date) <br /> Water sampling equipment was cleaned prior to each sampling event with a trisodium <br /> phosphate wash, steam clean rinse and distilled water rinse. Ground water samples <br /> collected from each well were stored in an iced cooler and submitted under chain-of- <br /> custody to Chemwest Analytical Laboratories in Sacramento Laboratory data sheets and <br /> logs of the monitoring wells (Plates 3 through 5) are included for your review <br /> The depth to ground water was measured in all three wells on May 27, 1988, prior to <br /> purging the wells All measurements were made from the top of the PVC casing using a <br /> Slope Indicator Company conductivity-based water level indicator All well casings were <br /> surveyed by a licensed surveyor to the nearest hundredth of a foot on March 3, 1987 <br /> Evaluation of ground water depth measurements obtained on May 27, 1988 indicate the <br /> hydraulic gradient is 0:05 percent with a flow direction to the southwest (Plate 6). The <br /> hydraulic gradient and flow direction is similar to the direction and gradient calculated <br /> from previous ground water depth measurements. <br /> Discussion <br /> Table III lists the sample numbers, sample location, date and a summary of the analytical <br /> results of the three rounds of ground water sample collected at the Food & Liquor Store <br /> #76. <br /> KLEINFELDER 9795 Business Park Drive, Suite C Sacramento, CA 95827 (916) 366-1701 <br />