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a <br /> LIQ .. f: • 'T <br /> r - - •A <br /> JI r+a <br /> The analytical results for lead ranged bum 2.8 mg/kg to 9.7 rng/kg. These concentration <br /> are believed to correspond to naturally occurring lead levels in the-mil. <br /> TFIiwas rot encountered in any of the grtundwater simples collected during this <br /> investigation.. ?Free product wa•5 not observed in any °af the three wells during the <br /> t� groundwater investigation. Bensene. and total xylenes wort' detected in the groundwater <br /> samples. The analytical results for the soil samples collected above the groundwater i <br /> interface were below the detection limit of the gnalyses for T;yH and BTEX, Elevated levels '-,' <br /> of fecal coliform were detected rrl monUrs.-mg Yells MW­2 and,AfW-3 at 2AP.N/100 ml and <br /> _ 6 MPN/100 ml, respectively. = <br /> r s <br /> 1.3 PUICOSh, iD <br /> 'N <br /> A ' 1 <br /> rn a The purpose of this report is to provide quarterly groundwater mo11it4ring d?F�for tI Ma or <br /> l <br /> Mart site as requested,bry SJCPKS in a letter dated November 12, 1991. This report was p <br /> . prepared following the report requirements as specified in the November 12, 1991 letter, and <br /> r �a Appendix A -Reports, Tri-Regional Board Staff November 1990 Draft Guidelines titled) <br /> r, <br /> "Recommendations for Preliminary Evaluat,on and Investigation o' rJnderground.Tank <br /> i' Sites." r ti <br /> t <br /> y, u. „ <br /> 1.4 SCOPE #lx /r <br /> The scope of WCC Is work during the quarter ending December 1991 included the colle.�Ggrir,- <br /> r f _ of quarterly groundwzter monitoring data. ter` r <br /> Oji y' _ -•' } �' <br /> To conduct this monitoring WCC completed the following tasks; 5� <br /> ; ✓�' r r� ..'M - �.' - 'p fit,..: <br /> a. <br /> L I measured the water level in each well <br /> purged&wells of approximately three vieII casing volumes,. <br /> -: 3. sampled the purged wells for TFII, BT-X, total lead and Fecal coliform <br /> 3 <br /> 4. submitted the samples collected on December 31, 1991 _ko Matrix: <br /> r� Environmentaliaboratories Inc. <br /> r (Matrix)in Rancho Cordova, California and <br /> Anlab in Sacramento, California.for analysis, andl `: <br /> S: evaluated and tabulated the data;• and prepared.contarriinant maps. r ` <br /> r. <br /> 9acoz3s©fhWORMnnr.QRrr oa.za� <br /> r L A Yd Y J I'`A Ir"Y` <br /> t r � <br />