appropriate tool or easy way out?

220 Pages·2016·9.57 MB·English

by  Mary Fellows User

MONITORED NATURAL ATTENUATION
(MNA) FOR SITE CLEANUP:
APPROPRIATE TOOL OR EASY WAY OUT?
Charles Newell, Ph.D., P.E. David Adamson, Ph.D., P.E.
GSI Environmental Inc. GSI Environmental Inc.
Houston, Texas, USA Houston, Texas, USA
[email protected] [email protected]
ROAD MAP
• Intro: Changing Paradigms and MNA Principles
• Key Attenuation Processes
 Biodegradation
 Abiotic Processes
 LNAPL source zone degradation processes
 Other processes (immobilization, storage, dilution)
• Field Techniques and Technologies
 Groundwater sampling and analytical methods
 Compound Specific Isotopes Analysis (CSIA)
 Molecular Biological Tools (MBTs)
 Natural Source Zone Depletion (NSZD)
• Should MNA be Used? Data Analysis and Monitoring Tools
 Data requirements, LTM, and statistics to understand MNA rates
 Common Graphics and Calculations
 Remediation Timeframe Calculations
 Computer Models
• Implementation Topics
3
SOURCE
PARADIGM
1970s – early 1990s
4
SOURCE
PARADIGM
1970s – early 1990s
5
PUMP AND TREAT THE PLUME
Recovery Well
Installation Well Screen
Centralizer
Wire-Wrap
Well Screen
Driller’s
knee
Sand-
Driller’s
Gravel
helper
Filter
Pack
6