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<br />to put in a 60 foot well, with perforated piping 20 feet down and do a 24 hour pump test at 300 <br />~ gallons per minute. The can start testing now and not wait until demolition is complete. The <br />targeted site will the Chevron comer. It was suggested that since the migration of groundwater <br />flow is heading northwest towards the Willamette River, it would be best to go as far north as <br />possible for pump test. Another method we can employ will be the slit-trench approach for <br />obtaining samples of soil and groundwater on the northem section. You slit-trench as deep as <br />you can until you run into water. Then you move and complete another slit-trench and test the <br />water at each slit-trench. We know there are hot spots on the southeast corner of the Chevron <br />site, but don't know the source. The water pumped out during the 24 hour test will be put into <br />tanks and then tested and discharged appropriately. <br />Our worst case scenario based on any de-watering problems could affect design. If the data <br />develops that would prevent us from completing a two story parking structure, and we <br />have to go to one level, what is the mazimum stall count? The structure h~s been shifted <br />and moved since original design and architect has never done a full single level parking scheme <br />in 30' structural grid. We can get 278 spaces with efficiency rating of 362 on e~sting 30' grid. <br />A correction to the efficiency rating we gave ea.rlier on the 377 + 48-50 extr~ space design <br />would be 359.8 not 362. Our compact ratio still good. Discussions were held regazding <br />minimum standards on striping of stalls in the Salem area: 9 x 19 standa.rd size and compact is 8 <br />x 15 or 8.5 if near wa1L <br />~ County has concems now that we don't know where to take it from here. It see~s this lack of <br />information on environmental issues comes far too late. Can anyone here tell ~s we aren't in <br />trouble? The worst case would be we can't go two floors on pazking structure. Melvin Mark <br />suggested we do the slit-trenching and water flow tests and get as much informatian as we can to <br />put together a de-watering plan and then move forward. The best case scenazio wi~uld be things <br />continue on schedule and we have nothing to worry about. Melvin Mark and Centurywest will <br />follow up with joint meetings to try and keep on schedule with our September 1 construction <br />deadline. <br />Centurywest reported that the demolition phase is on track, but some issues have come up with <br />unexpected asbestos, but we are ready for that contingency. Mike Staton verbally stated they <br />will be getting off the site by the 12th or 18th of August. <br />Our May 1a1 time schedule left us with 30 day window between demolition completion (August <br />1) and start of construction (September 1). If we need to save a few days, we hav~ the option of <br />skipping some forms of recycling to complete the demolition phase sooner. County's <br />concern now is do we have a deal killer and basic design changes if we can'~ come out of <br />the ground by September 1? Start date will not affect Pence Kelly if it gets dielayed. They <br />can push it back a month at a time. Melvin Mark added the e~rtreme worst case would be <br />parking structure above ground. This was looked at about one and half years ago. With the <br />groundwater table at 11-17 feet per the geotechnical reports, it would not advers~ly affect one <br />level of parking structurally. <br />~r` Page 3 of 5 <br />