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,. <br /> Lambert Barnum <br /> November 24, 1990 <br /> Page 4 <br /> SUMMARY AND RECOMMENDATIONS <br /> As the analyses in Table 1 reveal, no significant levels of TPH and BTXE were found in <br /> any of the verification samples collected from the side walls of the auger borings. <br /> Although the average concentration of oil and grease remaining in the soil column at a <br /> depth of 7 feet was in excess of 300 mg/kg, this value must be considered a maximum ; <br /> level due to the complexities of the angering and sampling activities. Since the original <br /> J. level of oil and grease exceeded 19,000 mg/kg, Murray& Asseciates recommends that no <br /> further soil remediation be completed at the subject property. Although the analytical <br /> results of the water samples collected from the three monitoring wells were not available <br /> for inclusion in this report, they will be submitted to the San Joaquin County Department <br /> of Health as soon as they are received. A decline with time in the level of purgeable <br /> halocarbons found in MW-1 and MW-3 will verify complete source removal. <br /> LIMITATIONS <br /> This report was prepared in general accordance with the accepted standard of practice <br /> which exists in Northern California at the time the investigation was performed. No other <br /> ' warranty, either expressed or implied, is made. <br /> We appreciate the opportunity of working with you on this projeci. If we may be of <br /> further service, please contact us at your earliest convenience. <br /> Since ly, <br /> EKED Q <br /> :ert S. Murray. Ph.D. Gf <br /> President. : e K��RNY CP <br /> ' Pb.® <br /> KSM:cal 32fi4 <br /> • <br /> Enclosures F' <;'••. •'����` <br />