EXH0674025026

This letter report presents the results from the monitoring well installation near your underground fuei storage tanks at the Weyerhaeuser Sea-Tat Airport facility (Figure !). We understand that the purpose of installing the monitoring wells was for compliance with the Port of Seattle's National Pollutant Discharge Zlimination System Waste Discharge (NPDES) permit and to assess the subsurface conditions of soils in the Vicinity of the underground tanks. Our work included the installation of 3 monitoring wells designated WY-1, WY-2, and WY-3 (Figure 2). The wells were STRUNK 00963 AR 025026 | Weyerhaeuser J-2359 May 3, 1989 Page 2 | drilled and installed at least 5 feet below the bottom ofB the underground tanks. During drilling, soil samples were collected at 5-foot-depth : intervals. These samples were screened for petroleum J product contamination using visual evidence and odor. The : field screening was supplemented by organic vapor headspace p measurements using an H-Nu photoionization detector. The work performed by Hart Crowser, Inc., and this letter P report were prepared in accordance with generally accepted professional practices related to the nature 0f the work .,_ accomplished in the same or similar localities at the time the services were performed. This report is for the @ specific application to the referenced project and for the exclusive use of Weyerhaeuser. No other warranty, express or implied, is made. *I SUMMARY OF FINDINGS [ o Field screening results indicated no detectable ' concentrations of petroleum product in soils samples from the borings (WY-I, WY-2, and…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]