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�ol�e� Associates Inc. <br />1751 West Counfy Rood F7. Suite 220 <br />Roseville, MN US4 551 13-4037 <br />Telephone (651) 697-9737 <br />Fax (651) 697-9735 <br />www.golder.com <br />March 15.2006 <br />Ms. Karen Kron�a�- <br />Minnesota Pollution Control Agency <br />�Len�ediatiar� Division <br />520 Lafayette Road <br />St. Paul, MN 55155-4194 <br />� �� <br />� �� i <br />` �`����. <br />� ' � <br />'�: '� � �� ��,,�} _-�� �. x •� �,�: <br />�"^�''' • - •L�' -- v.! ..- F•� •3: <br />�e: Revised Second Supplemental Phase YlInvestigation WorlcPlau—Mounds View Schooi <br />District Service Center <br />Dear Ms. ICromar: <br />Enclosed for your review is a revised Second Supplemental Phase I I Investigation Worlc Plan for the <br />above �-e�eref�ced site. The revised version of the worlc plan includes changes requested by you and <br />John Betcher in a memorandum dated March 2, 2006 and the telephone conversation I had with Mr. <br />Betcher on March 7,2006. Major revisions to the worlc plan include: <br />Collecting additional soil samples in the source area at multiple depths to assess vertical <br />concentration gradients of VOCs in the unsaturated zone; and <br />� Hydroprofiling at five locations to characterize geologic conditions and preliminarily <br />document VOC concentrations in groundwater at various depths. This il�fo»�tian will be <br />used to design monitoringwells for the site. <br />Please contact us at your convenience if you have questions regarding our approach to aonlplete the <br />investigation. W e look forward to hearing from you. <br />Sincerely, <br />GOLDER ASSOCIATES 1NC. <br />� <br />� r�� r <br />� r ,- � '�- •Y:•'i�� <br />� <br />Patricic Durilavy <br />Senior Consultant <br />4 <br />a �ti � <br />��� ���� � I 4�. <br />Marlc Sandfort, 1��. <br />Mi�nesnta Office Manager and Associate <br />enclosures: Second Supplemental Phase I� Worlc Plan <br />cc r�vlenclosures: John MaaslMounds View School District <br />Dan Colton/Leonard, Street & Deinard <br />OFFICES ACROSS AFRICA, ASIA, AUSTRALIA, EUROPE, NORTH AMERICA AND SOUTH AMERICA <br />�-,-*�-- <br />�� <br />� <br />��. <br />