July 31, 2002

Dear Ms. Fliss:

As per Supplement to Master Agreement For hazardous Substance Or Petroleum Response Services between the Indiana Department of Environmental Management and Earth Tech, please find the Monthly Report of Operations of the Illinois Central Spring Treatment Plant, Bloomington Indiana for the reporting period of June 2002.

Operational Status - The plant operations for the month of June were normal with no down time experienced. Precipitation recorded for the month was 5.61 inches. The maximum rainfall during a 24-hour period was on June 5 with 1.91 inches recorded. A total of 14,553,463 gallons of water was processed through the facility that includes 2,407,725 gallons returned from storage for processing during the month. The SRS Tanks received a total of 2,541,790 gallons for the period with 134,065 gallons attributed to clarified overflow. No water was held in bulk storage at the close of the month. No overflows of the SRS were experienced.

Corrective Measures Taken or Planned - The following operational changes were made in the Month of June.

Earth Tech completed the necessary work to relocate the primary level control (ultrasonic) in the SRS. The sensor wiring was placed and preparations made for changing the head to the new location. The change will place the sensor in a location that will experience less surface interference. In addition to the change in location, a stilling well will be placed in July to further dampen radical changes in the level measurements.

Based on the results of the air quality monitoring, the PCB levels throughout the plant and the SRS floor level were well within the working levels as published by NIOSH and OSHA. The SRS lower level has concentrations of PCB's that will require either PPE or engineering controls prior to entry. The U.S. EPA has requested that a combination of engineering and administrative controls be used to allow unencumbered access to the SRS sump. The plans for this type of control are scheduled to begin in August with a working system placed in September. Once the system is operational, additional monitoring will be conducted to confirm that the environment is safe to work within. In the interim, respirators or SCBA will be required for entry to the sump area.

A one (1) year inspection of the SRS Tanks was conducted with the results forwarded to Kennedy Tank (Contractor). The inspection primarily noted small (< 1" dia.) areas of rust that required Kennedy's attention. This matter was covered under the warranty for the tank coatings (5 year warranty period). Kennedy has subsequently taken care of the matter to our satisfaction.

On a regular basis the SRS Sump is inspected and cleaned accordingly. During the reporting period, the SRS sump was evacuated with the excess solids moved directly to the #1 Thickener via the clarifier bypass.

The SRS Tank Drain Valve was reprogrammed to limit its capability to fully open. This change allows the system to find its proper flow rate quicker and without excessive valve movement. Prior to the change the valve would fully open allowing over 2000 gpm into the sump and then would correct for the flow by closing too far. This change allows for a maximum automated inflow of 1000 gpm. If a higher rate is need for emergency situations the automated controls can be bypassed manually.

Analytical Results - A summary of the analytical results for the reporting period are attached to this report on the Event Sampling Analysis Log. Any results for this reporting period that are not available as of the reporting date are logged without the test results.

Test results of the effluent on June 5, 2002 show an elevated PCB and TSS readings of 0.32 ug/l and 7 mg/l respectively. The operating limits of the plant were set at 0.3 ug/l for PCB's only. It appears that either an ineffective or incomplete backwash of the GAC units compromised the plant efficiency. Both measurements of PCB and TSS are normally below the detection limits. This spring season has had an unusual amount of rainfall as compared to previous years. Accordingly, it appears that the system has become burdened with heavier sediment loadings that may not have been effectively flushed from the system for the time that was allocated. Subsequently, the backwash cycle has been increased to clear any residual sediment from the GAC system. As of this reporting the increase in backwash time and volume appears to have resolved the issue. The system will continue to be monitored for any anomalies that may appear.

At the direction of IDEM, additional water samples were collected of the spring influent to provide a basis for the issuance of NPDES effluent limits. The test results will be submitted upon there receipt for the agencies use. As a matter of record, the ICS facility was designed and constructed to remove PCB's from the Illinois Central Spring. Though the facility may have the capability of removing other possible pollutants and other undesirable elements, the facility was not designed to do so. The current budget does not reflect the cost of collecting or analyzing samples for properties other than PCB's and TSS.

Unexpected Maintenance Requirements

Evidence Of Trespassing

Report from Visitors Log / Plant Access

Summary of Costs

Total costs for this Project for the reporting period of June 2002 (5/25/02 to 6/21/02) were $25,785.25. Project cost to date is $231,831.89 less any expenditure that has not been approved by the agency. This accounts for approximately 75.67% of the project costs as of the reporting date.

This cover letter and attachments complete the monthly report for Illinois Central Spring. If there are any questions, please contact Tom High or Martin Lytle at 812-331-2741.