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JAMES GIOTTONINI <br /> PAGE 2 <br /> Smith Environmental will prepare the system design which will go out to <br /> bid within three weeks. The design, bidding, permitting and construction <br /> should be completed by December 1995. <br /> Argonne and Picardy <br /> Twinning grouted and sampled the recently installed monitoring well <br /> without notifying PHS/EHD. However, the soil and groundwater results <br /> showed nondetectable levels. The well must be sampled at least one <br /> more time (at least thirty days after the first sample event). If the <br /> second sample event yields nondetectable levels a closure report should <br /> be submitted to PHS/EHD and should include a workplan to destroy the <br /> monitoring well at the site. <br /> 1740 Houston Avenue <br /> Tank removal soil results confirm that the east end of the tank pit is <br /> clean at 11 feet. The grab sample from the middle of the excavation at <br /> 11 feet during the overexcavation activities on April 3, 1995 had a <br /> strong petroleum odor. A sidewall sample of unknown depth indicates <br /> that contamination is extending laterally beneath the building. <br /> An addendum to the existing workplan must be submitted to PHS/EHD <br /> within three to four weeks to describe the procedures to: <br /> 1) Backfill the east end of the tank pit in the presence of the <br /> PHS/EHD inspector. <br /> 2) Dewater and overexcavate the west end of the pit and the <br /> dispenser area. <br /> 3) Sample the west end sidewall to determine if an investigation <br /> beneath the building is warranted. <br /> 4) Submit a workplan for the investigation beneath the building if <br /> necessary. <br /> The workplan is to be implemented within two weeks of PHS/EHD <br /> approval. <br /> 2500 Navy Drive <br /> The angle borings under the maintenance building (131 and 132) showed <br /> residual contamination. All other soil boring and monitoring well sample <br /> results were non detect. Modeling of residual contamination will <br /> determine if further work or investigation/mitigation is required. <br /> 4010 East Main <br /> The soil borings recently installed at the site showed only a limited <br /> amount of soil contamination remaining between 10 and 15 feet. A <br />