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California Ronal Water Quality Conl9l Board Central Valley Region a Katherine Hart, Chair 11020 Sun Center Drive,#200, Rancho Cordova,California 95670-6114 Linda S.Adams (916)464-3291 • FAX(916)464-4645 ^E E'VED Edmund G. Brown Jr. Acting Secretary for http://www.waterboards.ca.gov/centralvall Governor Environmental Protection HEH 141 ._011 9 February 2011 ENVIRONMENTAL HEALTH Mr. James Nitzschke PERMIPSERVICES J Deere & Company One John Deere Place Moline, IL 61265 REVIEW OF SITE SUMMARY REPORT, FORMER LESCO SITE, 2829 W. WASHINGTON STREET, SAN JOAQUIN COUNTY, CA John Deere Landcapes purchased Lesco facilities, including the facility that had been operating at 2829 West Washington Street in the Port of Stockton. As reported in a 12 November 2010 meeting with your consultants, Mr. Robert Brod of Hyde Environmental, Messers. Bruce Lewis and Matthew Scheeline of Environmental Resources Management (ERM), Deere & Company intends to clean the facility and terminate the lease agreement. The site has been vacant since 2006. The site has been a fertilizer formulating and distribution center since before 1985, operated by Delft, Tri-Delta Fertilizer, and Lesco. Several site investigation assessments have been conducted since John Deere Landscapes acquired the facility. The results of these investigations are reported in the November 2010 Comprehensive Site Summary Report, (Site Summary Report) prepared by ERM. Cleanup Goals for Groundwater The Site Summary Report presents soil and groundwater data and proposes soil and groundwater cleanup goals for the site. The water quality objectives identified in the Site Summary Report are appropriate for protection of human health through ingestion of drinking water, and the relevant criteria is the Maximum Contaminant Level. For some chemical constituents, however, the water quality objective must also protect beneficial uses that are more sensitive to pollution than humans. For example, to protect agricultural uses of water, the water quality goal for chloride is 106 mg/L, lower than the Maximum Contaminant Level of 250 mg/L. The attached Table of Water Quality Objectives identifies the cleanup goals for constituents that are of concern at this site. The cleanup goals that are protective of groundwater are also protective of other beneficial uses, including human health. Nitrogen The water quality objective for nitrate (as nitrogen) is 10 mg/L, and for ammonium (including the un-ionized form) is 1.5 mg/L. There can be substantial biological degradation of nitrate in soil, and there is also biological interaction between ammonium and nitrate under favorable environmental conditions. Central Valley Water Board staff has established a generic cleanup goal for nitrogen in soil of 100 mg/kg for the sum of California Environmental Protection Agency r Recycled Paper