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. ff�AN� <br /> Working To Restore Nature <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Phone (209) 838-3507 APR 16 <br /> FAX (209) 838-3509 ENVIRONMENTAL HEALTH April 15, 1993 <br /> PERM IVSERVIGro <br /> Mr Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 2009 <br /> Stockton, California 95201 <br /> RE First Quarter 1993 Groundwater Monitoring Report, King Island Resort, 11530 <br /> W Eight Mile Road, Stockton, CA Site Code 1557 <br /> Dear Mr Infurna <br /> Enclosed are the First Quarter 1993 groundw r monitoring results for the above referenced site <br /> (Figure 1) Groundwater monitonng an mpling was conducted by RESNA Industries, Inc <br /> (RESNA) personnel on March 4, 1993 Water level measurements were collected from each <br /> monitoring well pnor to purging and sampling (Attachment 1) Water levels have nsen an <br /> average of 1 81 feet since the last monitoring event in December 1992 (Table 1) A <br /> groundwater gradient map wr, "away <br /> created using the data collected on March 4, 1993 Figure 2) <br /> orthea <br /> Groundwater flows nfrom the slough, with a gradient of 0 06Xeet/feet or <br /> approximately 360 feet/mile <br /> Subsequent to monitorog, each well (MW 1 - MWS) was purged byeextracting a minimum of <br /> 3 well casing volume While purging, the groundwater parameters✓(temperature, conductivity, <br /> and pH) were monitored and allowed to stabilize efore water samples were collected The <br /> samples were transported to and analyzed by state-certified RESNA Environmental Laborat nes <br /> in Fremont, California All purged groundwater was contained in DOT approved 55 allon <br /> drums and remains on site pending appropnate disposal <br /> Samples werealyzed for benzene, toluene, ethylbenzene, and total xylenes (BTEX) using EPA <br /> Method 8020, total petroleum hydrocarbons as gasoline (TPIb) and total petroleum <br /> hydrocarbons as diesel (TPHD) using modified EPA Method 801:5/ Monitoring Wells MW 1l <br /> MW2, and MW3 did not contain detectable concentrations of the petroleum hydrocarbon <br /> cons ituents Monitoring wells MW4 and MW5 contained Iow to moderate levels of BTEX and <br /> IQR-1993 rNL <br /> 1i1Y <br /> A# <br />