ARCHIVED REPORTS XR0007472 - Laserfiche WebLink

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Working To Restore Nature 1710 Main Street ala Escalon, CA 95320 MAR 4 1993 Phone (209) 838-3507 ENVIRONMENTAL HEALTH FAX (209) 838-3509 PERMIT/SERVICES March 3, 1993 Ms Mary Meays 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 Ms Meays This letter details RESNA Industries' First Quarter 1993 groundwater monitoring and sampling activities performed at the above referenced site (Figure 1) Groundwater monitoring and sampling was conducted on February 9, 1993 by RESNA personnel Water level measurements were collected from each monitoring and recovery well using a Solinst Water Level Meter (Model 101) Groundwater monitoring showed a rise in the groundwater table elevation since November 1992, averaging 1 42 feet (Attachment 1) Table 1 summarizes groundwater elevation information A groundwater gradient map was created using the February 1993 data Groundwater flow is to the east-northeast with a maximum gradient of 0 03 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 nondetectable concentrations of BTEX and TPHG will be disposed of at the site by dumping the water within the planters �' 1 OR 1993 FNL