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Chevy in the Hole Parcel A

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Site Overview - West Portion<br />Date Taken: 9/21/2010<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Sheen in Flint River Adjacent to Site<br />Date Taken: 9/22/2010<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Geoprobe Drilling on Site.<br />Date Taken: 9/21/2010<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Overview of Site<br />Date Taken: 9/21/2010<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
<br />Date Taken: 5/12/2010<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Setting up Geoprobe with UVOST<br />Date Taken: 10/17/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Roto-Sonic drilling<br />Date Taken: 10/17/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Roto-Sonic drilling<br />Date Taken: 10/17/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Roto-Sonic Drilling<br />Date Taken: 10/17/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Overview of site activities including Roto-Sonic drilling, UVOST with Geoprobe in the NW portion of the Site<br />Date Taken: 10/17/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Inspection of outfalls (#70 shown)<br />Date Taken: 10/18/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Outfall #70 with sheen<br />Date Taken: 10/18/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
City of Flint investigating Vault that connects 66-inch and 48-inch mains.<br />Date Taken: 10/18/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Sonic Drilling<br />Date Taken: 10/18/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Inspection of Outfalls in the Flint River near the NE portion of property <br />Date Taken: 10/18/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
NAPL in lithology sample collected from MW-61<br />Date Taken: 10/19/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
LATA-KEMRON checking NAPL in soils from MW-60<br />Date Taken: 10/19/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Sonic Drilling and well installation.<br />Date Taken: 10/19/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Sonic Drilling<br />Date Taken: 10/19/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Sheen coming out of Outfall #70 following rain event<br />Date Taken: 10/19/2011<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:

Site Overview - West Portion Sheen in Flint River Adjacent to Site Geoprobe Drilling on Site. Overview of Site Setting up Geoprobe with UVOST Roto-Sonic drilling Roto-Sonic drilling Roto-Sonic Drilling Overview of site activities including Roto-Sonic drilling, UVOST with Geoprobe in the NW portion of the Site Inspection of outfalls (#70 shown) Outfall #70 with sheen City of Flint investigating Vault that connects 66-inch and 48-inch mains. Sonic Drilling Inspection of Outfalls in the Flint River near the NE portion of property NAPL in lithology sample collected from MW-61 LATA-KEMRON checking NAPL in soils from MW-60 Sonic Drilling and well installation. Sonic Drilling Sheen coming out of Outfall #70 following rain event 1 4 Sheen continues to come from Outfall #70 following continued rain Purging MW-P5-51A. NAPL is visible on surface. Purging MW-P5-51A Development of newly installed monitor well MW-61 CITH Excavator CITH Excavator South Side of the Site Excavation Site Patching and sealing of Outfalls Patching and sealing of Outfalls Outfall Replacement location south end of Site near tie-in South end of CITH RV Site, showing asphalt parking area. Construction of a trench for a new Garden St. HDPE outfall pipe that will run across the Site to the Flint River Continuation of the Garden St. outfall trench The new HDPE Garden St. outfall pipe installed through the Flint River barrier wall (north edge of Site) CMC installing the Garden St. HDPE outfall pipe into the trench The rebuilt Garden St. catch basin on the south side of the Site, with original clay outfall pipe still in place The completed Garden St. outfall trench, approximately 600feet in length The original clay Garden St. outfall pipe in poor condition CMC installing the remaining HDPE outfall pipe into the trench New HDPE Garden St. outfall pipe installation complete Garden St. HDPE outfall pipe attached to clay pipe on catch basin using a rubber fernco coupling CMC begin backfilling the Garden St. outfall pipe trench. Garden Street outfall pipe trench filled and graded Garden Street outfall trench viewed from the south side of the Site Berm constructed at the base of Site hill to slow surface water runoff and control erosion Fence on south side of Site re-installed, Site perimeter secured Garden Street catch basin area south of Site, backfilled and graded with guardrail and fence re-installed West side of parcel A at time of mobilization Sanitary sewer vault located toward the west side of Parcel A Oil releasing from subsurface soil, floating on the surface of rainwater trapped within the excavation Outfall #70 pipe, located along side the sanitary sewer vault, being prepared for abandonment by filling with concrete West side of parcel A, current conditions on 8/23/13. Oil originating from subsurface soil, floating on the surface of rainwater trapped within the excavation Groundwater relief line installed on west side of the sanitary sewer vault Temporary bladder dam installed within Flint River while the Outfall #70 concrete plug cures Outfall #70 after the bladder dam and wood/steel forms have been removed Excavation area west of the sanitary sewer vault, following backfill and gravel cap being installed Contaminated soil from the stockpile area being loaded into trucks for disposal