2007-10-30_HYDROLOGY - M1992069

• Permit No: M1992069
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/30/2007
• Doc Name: Site closure request
• From: Aggregate Industries
• To: DRMS
• Media Type: D
• Archive: No

' TABLE 2
SUMMARY OF GROUNDWATER SAMPLE RESULTS
(Page 1 of 1)
PROJECT NAME: Aggregate Industries F Street G ravel Pit
PROJECT LOCATION: 4509 F Street, Greeley, Colorado
PROJECT NUMBER: 1001018
Dissolved
Sample Sample Benzene Toluene Ethylbenzene Xylenes TEPH Oxygen
Name Date (µg/L) (µg/L) (µg/I-) (µP~-) (mom-) (mgt-)

Abatement Pit GW 05/17/01 <0.5 <0.5 <0.5 47. 126. NM
Excavation Water 10/08/07 <0.5 <0.5 1.1 <0.5 93. NM
MW-1 07/25/01 <0.5 <0.5 <0.5 <0.5 <0.5 0.9
MW-1 10/18/01 <0.5 <0.5 <0.5 <0.5 <0.5 4.5
MW-1 01/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.5
MW-1 04/04/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.0
MW-1 07/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.1
MW-2 07/25/01 <0.5 <0.5 <0.5 3.6 <0.5 0.6
MW-2 10/18/01 <0.5 <0.5 <0.5 <0.5 <0.5 0.7
MW-2 01/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.0
MW-2 04/04/02 <0.5 <0.5 <0.5 <0.5 <0.5 0.8
MW-2 07/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.0
MW-3 07/25/01 <0.5 <0.5 <0.5 <0.5 <0.5 0.7
MW-3 10/18/01 <0.5 <0.5 <0.5 <0.5 <0.5 4.8
MW-3 01/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 2.1
MW-3 04/04/02 <0.5 2.1 1.3 6.9 <0.5 1.0
MW-3 07/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.4
MW-4 07/25/01 <0.5 <0.5 <0.5 <0.5 <0.5 0.9
MW-4 10/18/01 <0.5 <0.5 <0.5 <0.5 <0.5 4.0
MW-4 01/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.0
MW-4 04/04/02 1.1 2.1 1.6 9.3 <0.5 1.2
MW-4 07/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.2
MW-5 10/18/01 <0.5 <0.5 <0.5 <0.5 <0.5 0.8
MW-5 01/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.0
MW-5 04/04/02 <0.5 ~ <0.5 <0.5 <0.5 <0.5 0.9
MW-5 07/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 1.1
EW-1 07/25/01 <0.5 <0.5 <0.5 <0.5 <0.5 NM
EW-1 10/18/O1 <0.5 <0.5 <0.5 <0.5 <0.5 NM
EW-1 01/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 NM
EW-1 04/04/02 <0.5 <0.5 <0.5 <0.5 <0.5 0.8
EW-1 07/29/02 <0.5 <0.5 <0.5 <0.5 <0.5 0.8
MCLs 5. 1,000. 700. 10,000. NR NR
Notes:
1) The approximate sample locations are shown on Figure 4.
2) TEPH =Total Extractable Petroleum Hydrocarbons.
3) µg/L =micrograms per liter.
4) mg/L =milligrams per liter.
5) MCLs =Maximum Contaminant Levels which are the Colorado Groundwater Standards from "Basic Standazds for Ground Water" Regulation 41.
6) < =Less than the laboratory detection limit.
7) NM =Not Measured.
8) NR =Not Regulated.
P1~RAGON