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HEALTH CONSULTATION

GENERAL MOTORS CORPORATION SITE
SIOUX CITY, WOODBURY COUNTY, IOWA

 


CONCLUSIONS

Based on the information reviewed in this health consultation, no apparent public health hazard exists. However if data become available suggesting that human exposure to hazardous substances at levels of public health concern is occurring, or has occurred in the past, IDPH will reevaluate the need for any follow-up.

Soil and groundwater contamination remains on-site and off-site. As long as the Sioux City Municipal Wells No. 3 and No. 4 are pumped at a reduced rate, chlorinated VOCs are not expected to be detected

The remedial investigation should provide additional soil and groundwater data to ensure that exposures are mitigated. The feasibility study will consider future scenarios and recommend remedial alternatives to mitigate exposure which will result in a Record of Decision and a final remedy.

Children's Health Conclusion:

Based on available information and data reviewed regarding children's exposure and ultimately their health, we believe that no apparent health hazard exists or existed for children.

 

RECOMMENDATIONS

  1. Continue decreased pumping rates in Municipal Wells No. 3 and No. 4 to ensure mitigation of potential public exposure via drinking wate

  2. Focus remedial efforts on protecting the Sioux City Municipal Wells from contamination.

  3. Consider locating additional groundwater monitoring wells at various depths between GMC site and the Sioux City Municipal Wells. Data from wells in these locations will be needed to insure that the public water supply is protected.

  4. Continue efforts to locate the source of PCE, especially if it is determined to be an off-site source, to minimize the potential for exposures in the future.

 

 

REFERENCES

  1. HDR Engineering, Inc., Phase I Environmental Site Assessment for Sioux City Facility, AC Rochester Division, General Motors Corporation. Sioux City, Iowa. June 1993.

  2. HDR Engineering, Inc., Phase II Environmental Site Assessment for Sioux City Facility, AC Rochester Division, General Motors Corporation. Sioux City, Iowa. September 1993.

  3. HDR Engineering, Inc., Interim Site Assessment Report for Sioux City Facility, AC Rochester Division, General Motors Corporation. Sioux City, Iowa. October 1994.

  4. . HDR Engineering, Inc., Site Inspection Report for General Motors Corporation, AC Rochester Facility. Sioux City, Iowa. May 1996.

 

PREPARER OF REPORT

Health Assessment Team,
Toxic Substances Evaluation Program
Division of Health Protection
Iowa Department of Public Health


ATSDR Regional Representative
Denise Jordan-Izaguirre
Office of Regional Operations,
Region VII Office of the Assistant Administrator, ATSDR


ATSDR Technical Project Officer
Roberta (Bobbi) Erlwein
Division of Health Assessment and Consultation Superfund Site Assessment Branch

 

CERTIFICATION

The General Motors Corporation Site Health Consultation was prepared by the Iowa Department of Public Health, Toxic Substances Evaluation Program, under a cooperative agreement with the Agency for Toxic Substances and Disease Registry (ATSDR). It is in accordance with approved methodology and procedures existing at the time the health consultation was begun.

 

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