ARCHIVED REPORTS_FIELD NOTES AND PERMITS THROUGH 4_4_1997

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08/14/97 13:27 $312 977 2581 ZHG$ CHICAGO la 004 ZEVNIK NORTON GUIBORD & MCGOVERN Donald T. Bradshaw, R.G. Levine•Frirke•Recon Inc. August 14, 1997 Page 3 layer is identified..." [emphasis added]. LPL believes that the boring should be continued until the specified conditions are met. This will allow the more permeable layers beneath Lincoln Center to he more accurately defined. In paragraph three, LFR states that groundwater samples will only be collected from the"lowest saturated permeable interval"from the CPT-38, CPT-40, CPT-41, and CPT-46 through CPT-49 locations. Crroundwater samples should also be collected from shallower zones in order to more fully evaluate the distribution of contaminants in the saturated zone which resulted from releases in the source area. LFR stated in paragraph four of its August 12, 1997 correspondence that"tests [pore pressure dissipation]will be run until excessive pore pressures appear to have dissipated and quasi- static pressure conditions have been reached, or a maximum of 30 minutes have passed [emphasis added]." T,PT,believes that these iests'should be run' unfilia minimum of 30 minutes have passed, if quasi-static pressure conditions are not reached prior to that time. In paragraph five,LFR states that it will attempt to collect a groundwater sample from the"less permeable sediments located between approximately 40 and 55 feet bgs"at CPT locations 39 and 42 through 45. LFR also states that groundwater samples will be collected from permeable intervals identified in these boringsy LFR does not provide any criteria for selecting a specific depth interval for sampling. Since this information is critical to the success of the proposed CPTIPIPP investigation,it should be recorded and discussed. The grant of accessicontaiaed herein is conditioned upon the understanding that the work to be conducted will proceed with all deliberate haste, while simultaneously observing the requirement contained in the Permanent Injunction and the First Final Consent Decree that the Settling Dry Cleaning Defendants,('SDCDS"),must,,,toithe maximum extent practicable, not interfere with the operation of Lincoln Center or with the operation of the business of any tenant of Lincoln Center. In conclusion, LPD,; is granting ;the, SDCDs access for these activities as an accommodation to the, Special Mastcr, in spite of rhe fact that the Special Master has not determined that the SDCDs aretin,£u)l,;co�lpliance,with the,insurance requirements of the Permanent Injunction and the First Final Consent Decree. .In the event that the Special Master determines that additional or modified insurance is required to satisfy the provisions of the applicable Orders, this grant of access, wi Il,,be conditioned upon the SDCDs' making every effort to have that insurance in place prior;to completing,the pending„work. n i AUG 14 197 11:29 312 977 2561 PRGE.04