Presentation at the Meeting of the Forum
March 12,2002

Characteristics of the Chicot Aquifer
John Lovelace
United States Geographical Survey 

Monitoring of the Chicot Aquifier
Lewis "Dutch" Donlon
Louisiana Department of Environmental Quality

CHICOT AQUIFER SYSTEM
MARCH 12, 2002

Table of Contents

1. FEDERAL AGENCIES/ REGULATORY AUTHORITY
2. STATE AGENCIES/REGULATORY AUTHORITY
3. SURFACE THREATS 
4. SUBSURFACE THREATS
5. RESPONSE TO THREATS TO CHICOT AQUIFER SYSTEM
6. FACILITIES MONITORING CHICOT AQUIFER SYSTEM
7. CECOS INTERNATIONAL, INC. Map
8. CECOS INTERNATIONAL, INC. MW-91
9. CECOS INTERNATIONAL, INC. MW-61/MW-67
10. SASOL NORTH AMERICA, INC.
11. SASOL NORTH AMERICA, INC. M142-200 (& Map) 
12. CONOCO, INC. (WEST END) & Map
13. CHATEAU CHARLES AREA & Map 
14. CONOCO, INC.DOCKS AREA
15. PPG INDUSTRIES, INC. & Map
16. PPG INDUSTRIES, INC. CHICOT STABILIZATION SYSTEM & Map
17. PPG INDUSTRIES, INC.  CHICOT STABILIZATION SYSTEM & POTENTIOMETRIC MAP
18. LDEQ BASELINE MONITORING PROJECT
19. ouisiana Wellhead Protection Program (WHPP) and Source Water Assessment Program (SWAP) & Map
20. Summary

FEDERAL AGENCIES/ REGULATORY AUTHORITY

• USEPA
• RCRA
• CERCLA
• TSCA
• FIFRA
• CWA
• SGS
• USDWF
• NOAA
• US CG

STATE AGENCIES/REGULATORY AUTHORITY

• LDNR
• LDOTD
• LDHH
• LDEQ

SURFACE THREATS

• PIPELINES
• TANKS
• LOADING AREAS
• SPILLS

SUBSURFACE THREATS

• LANDFILLS
• LAND TREATMENT UNITS
• SURFACE IMPOUNDMENTS
• PIPELINES
• SEPTIC TANKS
• UNDERGROUND STORAGE TANKS
• WELLS/GEOPHYSICAL SHOTHOLES    
• SALT WATER INTRUSION
• MINING ACTIVITIES

RESPONSE TO THREATS TO CHICOT AQUIFER SYSTEM

• IDENTIFICATION
• ASSESSMENT
• REMEDIATION
• MONITORING

FACILITIES MONITORING CHICOT AQUIFER SYSTEM

• AT LEAST 8 LDEQ-REGULATED FACILITIES PRESENTLY MONITOR/ASSESS THE CHICOT AQUIFER SYSTEM IN THE IMMEDIATE LAKE CHARLES AREA
• AT LEAST 112 WELLS MONITORING ALL THREE SANDS OF THE CHICOT AQUIFER SYSTEM
• DOES NOT INCLUDE MONITORING BY OTHER AGENCIES/PROGRAMS/CPT’S

CECOS INTERNATIONAL, INC.
27 MONITORING WELLS IN “200-FOOT SAND” OF THE CHICOT AQUIFER SYSTEM

Please Click on the Image for the Map

CECOS INTERNATIONAL, INC. MW-91

• “200-FOOT” SAND CHICOT AQUIFER
• SAMPLED QUARTERLY
• VOC’s DETECTED INTERMITTENTLY BEGINNING 1998
• NON-DETECT SINCE APRIL 2001
• ASSESSMENT BEING IMPLEMENTED

CECOS INTERNATIONAL, INC. MW-61/MW-67

• SAMPLED QUARTERLY
• VOC’S DETECTED 4TH QUARTER 2001
• ASSESSMENT WORKPLAN BEING PREPARED

SASOL NORTH AMERICA, INC.

• CHICOT AQUIFER
• 11 WELLS IN “200-FOOT” SAND
• FLOW IS GENERALLY SOUTH-SOUTHWEST

SASOL NORTH AMERICA, INC. M142-200

• "200-FOOT" SAND WELL
• INSTALLED SEPTEMBER 2000
• VOC’S DETECTED 2/02
• ALL VOC CONCENTRATIONS BELOW 7 PPB

Please Click on the Image for the Map

CONOCO, INC. (WEST END)

• CPT WORK IMPLEMENTED 2001
• DELINEATE EDC PLUME ON CONOCO PROPERTY
• INSTALLED WELLS IN SEVERAL SHALLOW ZONES
• 3 WELLS INSTALLED IN “200-FOOT” SAND OF CHICOT AQUIFER SYSTEM
• NO VOC’S DETECTED IN CHICOT AQUIFER SYSTEM WELLS

CONOCO
WEST END

CHICOT AQUIFER “200-FOOT SAND” WELL LOCATIONS
Please Click on the Image for the Map

CHATEAU CHARLES AREA

• EDC DETECTED IN TWO WATER SUPPLY WELLS 1992
• 1993 HOTEL BEGAN RECEIVING WATER FROM LOCAL PWS
• LDEQ IMPLEMENTED SAMPLING PROGRAM/SAMPLING CONTINUES
• EDC DETECTED IN RESIDENTIAL WELL INTERMITTENTLY SINCE MARCH 1999
• ATSDR HEALTH CONSULTATION 4/2000

CONOCO, INC.DOCKS AREA

• 6 ON-SITE WELLS IN “200-FOOT” SAND
• ONE WELL DETECTED EDC BELOW MDL AT 0.0019 mg/L in 2001
• THREE OTHER WELLS HAVE HISTORICALLY DETECTED EDC/NO DETECTIONS SINCE 1996
• 2 OFF-SITE WELLS IN “200-FOOT” SAND CHICOT AQUIFER SYSTEM
• 1 WELL IN “500-FOOT” SAND CHICOT AQUIFER SYSTEM
• NO DETECTIONS OF EDC

PPG INDUSTRIES, INC.
CHICOT AQUIFER SYSTEM
 

• 28 “200-FOOT” SAND WELLS
• 7 “500-FOOT”SAND WELLS
• 1 “700-FOOT” SAND WELL
• 2 OFFSITE “200-FOOT SAND” WELLS
• 2 ADDITIONAL “500-FOOT” SAND WELLS TO BE INCLUDED 2001
• WATER LEVELS OBTAINED QUARTERLY FROM 28 ONSITE AND 12 OFFSITE WELLS
• QUARTERLY SAMPLING PROGRAM INCLUDES WELLS FROM ALL THREE SANDS IN CHICOT AQUIFER SYSTEM

AQUIFER
SYSTEM Map

Well Location Map
“200-Foot” Sand Wells - BLUE
“500-Foot” Sand Wells RED
Please Click on the Image for the Map

PPG INDUSTRIES, INC. CHICOT STABILIZATION SYSTEM

OBJECTIVE IS TO PROTECT GROUNDWATER QUALITY OF THE CHICOT AQUIFER SYSTEM BY PREVENTION OF MIGRATION OF CONTAMINANTS OFFSITE
Ø8 GROUNDWATER EXTRACTION WELLS

• GROUNDWATER MONITORING FROM APPROXIMATELY 40 WELLS IN ALL THREE SANDS
• DATA EVALUATION
• HYDRAULIC MONITORING
• RECOVERY SYSTEM MONITORING

CHICOT STABILIZATION SYSTEM


RECOVERY WELLS

PPG INDUSTRIES, INC.  CHICOT STABILIZATION SYSTEM SUMMARY (2001)

• 10 “200-FOOT” SAND WELLS HAD DETECTIONS OF VOC’S
• NO VOC’S DETECTED IN “500-FOOT” SAND WELLS OR IN “700-FOOT” SAND WELLS
• HYDRAULIC GRADIENT RADIALLY INWARD WITHIN THE FACILITY
• MASS OF CONTAMINANTS RECOVERED IN 2000 WAS APPROXIMATELY 600 POUNDS
• TOTAL SYSTEM GROUNDWATER PRODUCTION WAS 131,000,000 GALLONS AT AN APPROXIMATE FLOW RATE OF 250 GPM

POTENTIOMETRIC MAP

“200-FOOT” SAND OF THE CHICOT AQUIFER

LDEQ BASELINE MONITORING PROJECT

• ENVIRONMENTAL EVALUATION DIVISION
• CWA ACTIVITY
• 200 WATER WELLS SAMPLED
• 14 AQUIFER SYSTEMS
• THREE YEAR PERIOD
• VOC’S, SVOC’S, METALS, NUTRIENTS, PESTICIDES, PCB’S

Louisiana Wellhead Protection Program (WHPP) and Source Water Assessment Program (SWAP)
Wellhead Protection Program WHPP - 1986 SDWA Amendments 180 Approved Programs in Louisiana 11 Approved Programs in Calcasieu Parish

Source Water Assessment Program

• SWAP - 1996 SDWA Amendments
• ALL 1800 Public Water Systems to be Assessed by May 2003
• Will be prioritized for Protection Activities
• Mandatory

SUMMARY

• SEVERAL FEDERAL AND STATE AGENCIES HAVE AUTHORITY OVER VARIOUS ASPECTS OF CHICOT AQUIFER SYSTEM
• THREATS TO CHICOT AQUIFER SYSTEM HAVE BEEN AND CONTINUE TO BE IDENTIFIED AND ADDRESSED
• SEVERAL LDEQ-REGULATED FACILITIES MONITOR CHICOT AQUIFER SYSTEM
• MONITORING OF THE CHICOT AQUIFER SYSTEM CONTINUES