ARCHIVED REPORTS XR0007474 - Laserfiche WebLink

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' - - RKAWMAR Working To Restore Nature 1710 Main Street NOV 3November 25, 1992 Escalon, CA 95320 Phone (209) 838-3507 ENVIRONMENTAL HFAI Tv1 FAX (209) 838-3509 PERMIT/SERVICES Steven Schneider San Joaquin County Public Health Services Environmental Health Division P O Box 2009 Stockton, CA 95201 RE C M Weber Enterprises, Inc property, 141 North El Dorado Street, Stockton, California Dear Mr Schneider This letter details RESNA Industries' Fourth Quarter 1992 groundwater monitoring and sampling . activities performed at the above referenced site (Figure 1) Groundwater monitoring and sampling were conducted on November 4, 1992 by RESNA personnel Water level measurements were collected from each monitoring or recovery well using a Solinst Water Level Meter (Model 101) Groundwater monitoring showed a drop in the groundwater table elevation since August 1992, averaging 1 15 feet (Attachment 1) Table 1 summarizes groundwater elevation information A groundwater gradient map was created using the November 1992 data Groundwater flow is to the northeast with a maximum gradient of 0 017 ft/ft (Figure 2) Prior to sampling, a minimum of three casing volumes of water were purged from each well Groundwater samples were collected from each well after stabilization of pH, electrical conductivity (EC) and temperature The samples were collected using dedicated, disposable bailers The samples were sent to state-certified RESNA Environmental Laboratories in Fremont, California All samples were analyzed for benzene, toluene, ethylbenzene, total xylenes (BTEX) using EPA Method 8020/602 and total petroleum hydrocarbons as gasoline (TPHG) using modified EPA Method 8015 All purged water was contained in DOT approved drums and left on site pending laboratory analyses Water containing nondetec.table concentrations of BTEX and TPHG will be disposed of at the site by dumping the water within the planters • QR112592 FNL