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a <br /> Lambert Barnum <br /> November 24, 1990 <br /> Page 4 <br /> SUMMARY AND RECOMMENDATIONS <br /> 3 <br /> As the analyses in Table 1 reveal, no significant levels of TPH and BTXE were found in s` <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 ata <br /> depth of i feet was in excess of 300 mg/kg, this value must be considered a maximum . <br /> level due to the complexities of the augering and sampling activities. Since the original <br /> level of oil and grease exceeded 19,000 mg/kg, Murray &Associates recommends that no E <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 r .2 available <br /> for inclusion in this report, they will be submitted to the San Joaquin County Department - I <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 MPJ-3 will verify complete source removal. <br /> LIMrf'ATIONS <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 project. If we may be of <br /> further service, please contact us at your earliest convenience. <br /> Sincerely, <br /> 3 <br /> Kent S. Murray, Ph.D. <br /> President. <br /> KSM:cal <br /> Enclosures <br />