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O.E.S. - Knox's Texaco <br />April 11, 1991 <br />Page -4- <br />TABLE 1 <br />LABORATORY ANALYSES <br />Soil Samples <br />ND - none detected at limit indicated <br />++ a unit conversion ug/kg:parts per billion <br />mg/kg:parts per million <br />4.0 CONCLUSIONS AND RECOMMENDATIONS <br />Laboratory analyses indicate that trace amounts of lead (0.2 <br />mg/1) have been detected in the samples collected at this site. <br />The concentrations detected are well below the associated soluble <br />threshold limit concentration (STLC) values (5.0 mg/1) contained <br />in Title 22 (Hazardous Waste Regulatory Criteria) of the <br />California Code of Regulations (22 CCR) Article 11. Condor <br />recommends that since (1) the concentrations of lead detected are <br />well below the STLC, and (2) the source of potential <br />contamination has been removed, no further action is warranted at <br />this site. <br />If you have any questions or need any additional <br />information, please call us at (209) 668-9234. <br />Resp ctfulllly submitted, <br />. vl' <br />ail L. Holmes <br />Staff Geologist <br />OES;RnoxTex.45D <br />c <br />1 <br />nald T.'Bis p <br />Registered Geologist <br />State of California <br />#4852 <br />1�� <br />CONDOR <br />B <br />T <br />E <br />X <br />TPH-G <br />LEAD <br />EDB <br />Detection <br />Limit <br />5.0 <br />ug/kg** <br />5.0 <br />ug/kg <br />5.0 <br />ug/kg <br />5.0 <br />ug/kg <br />1.0 <br />mg/kg <br />0.1 <br />mg/l <br />10 <br />ug/kg <br />#145D-TK1-N <br />"ND <br />ND <br />ND <br />ND <br />ND <br />0.2 <br />ND <br />#145D-TK1-S <br />ND <br />ND <br />ND <br />ND <br />ND <br />0.2 <br />ND <br />ND - none detected at limit indicated <br />++ a unit conversion ug/kg:parts per billion <br />mg/kg:parts per million <br />4.0 CONCLUSIONS AND RECOMMENDATIONS <br />Laboratory analyses indicate that trace amounts of lead (0.2 <br />mg/1) have been detected in the samples collected at this site. <br />The concentrations detected are well below the associated soluble <br />threshold limit concentration (STLC) values (5.0 mg/1) contained <br />in Title 22 (Hazardous Waste Regulatory Criteria) of the <br />California Code of Regulations (22 CCR) Article 11. Condor <br />recommends that since (1) the concentrations of lead detected are <br />well below the STLC, and (2) the source of potential <br />contamination has been removed, no further action is warranted at <br />this site. <br />If you have any questions or need any additional <br />information, please call us at (209) 668-9234. <br />Resp ctfulllly submitted, <br />. vl' <br />ail L. Holmes <br />Staff Geologist <br />OES;RnoxTex.45D <br />c <br />1 <br />nald T.'Bis p <br />Registered Geologist <br />State of California <br />#4852 <br />1�� <br />CONDOR <br />