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Union Ice Company <br /> P ,Y <br /> Quaneily Sampling Report, January, 1992 <br /> Page 4 <br /> west of the asphalt (see map, bio-remediation site, Union Street) The soils were <br /> I inoculated with bacteria, kept moist and periodically mixed, using a tractor Again, <br /> this work was performed by McCain Environmental Services <br /> The treatment goal was 100 ppm or lower, which was more than achieved Soil <br /> samples taken at the completion of the project were "none detected" for all consti- <br /> tuents <br /> 10 Pump testing of the aquifer occurred on March 2, 1991 Well #8 was pumped for a <br /> 12 hour period at 4 16 gpm, total water removed form the aquifer was 3,000 <br /> gallons All of the data from the pump tests has been reported in previous reports <br /> We have produced an additional graph for this report, at the County's request, <br /> showing the draw down effect on the surrounding wells (Appendix E) <br /> Confusion regarding ground water contamination persists Because no significant <br /> contamination has been found in any of the wells, we believe two things first, Sig <br /> nificant ground water contamination never occurred, second, we believe that the <br /> pumping of the 3,000 gallons of water during the pump test probably removed the <br /> contaminated water We feel this is a reasonable explanation based upon the <br /> analytical results observed over the last three (3) years <br /> Subsequent to this project, soils were re-excavated from the 1320 Weber Avenin site <br /> Approximately 800 yards of contaminated soil was excavated from the former fuel tank <br /> area Contamination was gasoline, where the average concentration was 69 pprn by <br /> weight Again, a permit was obtained from the APCD, the permit stipulated that no <br /> more than 486 cubic yards per day could be aerated The aeration took approximately <br /> 60 days to complete Aeration was again performed by McCain Environmental The <br /> area where aeration was performed is shown on the Soil Remediation Activities map <br /> (Weber Avenue Aeration) Following aeration, samples were taken with results <br /> showing "ND" Some mixing of the Union Street and Weber Avenue soils occurred <br /> after aeration activity Since all soils were tested as "ND", this was not considered to <br /> be a problem Results of these activities have been reported in previously submitted <br /> reports <br /> •' <br />