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Adobe PDF File 69 Pages [15MB]
Adobe PDF File 69 Pages [15MB]
Adobe PDF File 69 Pages [15MB]
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1<br />
SCAPS Laser Induced Fluorescence Investigation<br />
RPM Meeting<br />
Naval Air Station Fallon<br />
April 26, 2007<br />
Tim Shields<br />
Richard Brady & Associates
2<br />
Purpose of SCAPS Investigation<br />
Free product acts as a continuous source of dissolved phase<br />
groundwater contamination and vapor intrusion<br />
Removal of free product is required by NDEP and is generally<br />
the first step in site closure<br />
Free product contamination at Sites 1, 2, 14, 16, UST 395, and<br />
UST 806 is not fully delineated<br />
GOALS OF INVESTIGATION:<br />
Identify source or sources of free product<br />
Define lateral and vertical extent of free product at each site
3<br />
For comparison, SDSU research on hydrocarbon<br />
saturation at a site in San Diego.
4<br />
Generalized SCAP LIF Response in Sand
5<br />
Well ID<br />
GTI-9<br />
DTP<br />
(ft bTOC)<br />
Jan 2007<br />
9.45<br />
DTW<br />
(ft bTOC)<br />
Jan 2007<br />
11.19<br />
First SCAPS Push at IR Site 2<br />
Product<br />
Thickness<br />
(ft)<br />
Jan 2007<br />
1.74
6<br />
Selected Site 2 Locations Showing LIF and Product
7<br />
LIF and Product
8<br />
LIF and Product
9<br />
LIF and Product
10<br />
LIF and Product
11<br />
LIF and Product
12<br />
LIF below water table, no product
13<br />
LIF below water table, no product
14<br />
LIF below water table, no product
15<br />
Less Product than Expected
16<br />
Less Product than Expected
17<br />
Less Product than Expected
18<br />
Less Product than Expected
19<br />
More Product than Expected
20<br />
Low Fluorescence, Fine Grained Soil,<br />
Small Amount of Product
21<br />
Much Less Product than Expected
22<br />
Much Less Product than Expected
23<br />
Site 2
24<br />
Site 2
25<br />
Background LIF, Low Lab Results
26<br />
Background LIF, Low Lab Results
27<br />
Background LIF, Low Lab Results
28<br />
Background LIF, Low Lab Results
29<br />
Background LIF, Low Lab Results
30<br />
Background LIF, Sheen in Well
31<br />
Background LIF, Low Lab Results
32<br />
Background LIF, No Sheen in Well
33<br />
Background LIF, Low Lab Results
34<br />
Background LIF, Low Lab Results
35<br />
Background LIF, High Lab Results
36<br />
No Sheen
37<br />
Fuel Fluorescence Corroborated by Lab Analysis
38<br />
Fuel Fluorescence Corroborated by Lab Analysis
39<br />
Fuel Fluorescence Corroborated by Lab Analysis
40<br />
Fuel Fluorescence Corroborated by Lab Analysis
41<br />
Fuel Fluorescence Corroborated by Lab Analysis
42<br />
No Sheen
43<br />
Fuel Fluorescence Corroborated by Lab Analysis
44<br />
Fuel Fluorescence Corroborated by Lab Analysis
45<br />
Fuel Fluorescence Corroborated by Lab Analysis
46<br />
0.21 ft. Product
47<br />
Fuel Fluorescence Corroborated by Lab Analysis
48<br />
2.5 ft. Product
49<br />
Fuel Fluorescence Corroborated by Lab Analysis
50<br />
Fuel Fluorescence Corroborated by Lab Analysis
51<br />
1.93 ft. Product
52<br />
Fuel Fluorescence Corroborated by Lab Analysis
53<br />
Fuel Fluorescence Corroborated by Observations
54<br />
0.01 ft. Product Accumulated in Well
55<br />
Fuel Fluorescence, Lab Result Lower Than Expected
56<br />
Fuel Fluorescence, Lab Result Lower Than Expected
57<br />
0.01 ft. Product
58<br />
Fuel Fluorescence, Lab Result Lower Than Expected
59<br />
3.0 ft. Product
60<br />
Elevated Fluorescence, but Lab Non-Detect
61<br />
Elevated Fluorescence, but Lab Non-Detect
62<br />
Soil Fluoresces, Low Lab Result, and …
63<br />
… 0.01 Feet of Product
64<br />
Site 1
65<br />
Site 1
66<br />
Site 395 Oblique View
67<br />
Site 395 PlanView
68<br />
Site 16
<strong>69</strong><br />
Site 16
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