FIELD DOCUMENTS AND WORK PLANS 1992-1999

Home Browse Search

rt *ering, Corporate Offi 619.942.5147 Environmental Sciences and 605 Third Street Fax 619.632.0164 & ASSOCIATES Management Services Encinitas,California 92024 A California Corporation December 24, 1996 736.01 Mr. Dave Bates Marley Cooling Tower Company P.O. Box 25948 Shawnee Mission, KS 66225-5948 Re: Analysis of the Potential Impacts in Groundwater from Usage of Main Street Irrigation and Main Street Domestic Wells Dear Mr. Bates: In accordance with your request, Dudek & Associates, Inc. (Dudek) has reviewed the potential impacts from possible future usage of Main Street Irrigation (MSI) and Main Street Domestic (MSD) Wells on intermediate zone groundwater containing total dissolved chromium. These two wells are located south of East Main Street, near reclamation wells I-4 and I-5 (Figure 1). Because of decreasing total dissolved chromium concentrations in the aquifer, Marley is contemplating stopping domestic water service to the East Main Street address. This would require the domestic water supply to be provided by the onsite MSD well or the owner to assume domestic service. If the owner chooses to use the onsite MSD well for water supply, Dudek reviewed the potential impacts to remedial wellfield capture. Results from the MODFLOW (McDonald and Harbaugh, 1988) and SURFACT (Hydrogeologic, Inc. 1996) models of the Marley site indicate capture is maintained by the remedial wellfield along East Main Street. Increased pumpage from the Main Street wells did not affect capture. The model also indicated that, even with increased pumpage, the Main Street Domestic and Irrigation wells did not receive concentrations of total dissolved chromium exceeding the State of California maximum contaminant level in drinking water (MCL) of 50 micrograms per liter. BACKGROUND The Marley Cooling Tower Company (Marley) has been providing water to the two residences that originally relied on the MSD well. This water is presently from municipal pipelines located beneath East Main Street. Marley has been providing drinking water, as bottled water or municipal supply, to these residences since 1989.