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0 0 Phase I Environmental Assessment Page 9 152 Frank West Circle - Stockton, CA March 31, 1993 5.0 SUMMARY AND CONCLUSIONS At the direction of Standard Insurance Company, ASE conducted a Phase I Environmental Assessment for an approximately 1.8 acre parcel of land located at 152 Frank West Circle in the City of Stockton, California. The subject property, is occupied by a single -story, 25,864 square -foot, concrete building which was formerly occupied by CWI, a computer circuit board plating company, is surrounded by asphalt -surfaced parking lots, storage lots, and driveways; two storage sheds; and a covered hazardous waste treatment system (see Figure 3). Although CWI is no longer in business, it appears that CWI left virtually everything in-place, including: office equipment, books, and files; processing equipment, tools, and chemicals; circuit boards; and containerized solid and liquid waste. A site inspection revealed the presence of potential environmental hazards in the form of: approximately 570 drums, vats, and tanks ranging in size from 1 -gallon to 1,000 gallons containing approximately 42,000 gallons of hazardous chemicals and waste; approximately 28,000 gallons of chemically contaminated water and sludge, currently located in three concrete sump areas; approximately 58 cubic -yards of containerized hazardous waste solid; oil and grease contaminated asphalt -surfaced area; dry, chemical residue on the floors and equipment in the Plating Room and Dry Film Room #1; and asbestos (non -friable) containing floor tiles. The on-site storage of hazardous waste for a time period greater than 90 days is in direct violation with the California hazardous waste management regulations, therefore, immediate consideration must be given to the disposal of all hazardous waste located at 152 Frank West Circle. Immediate disposal of the hazardous waste, particularly the chemicals within the Plating Room, is also required to allow for an inspection of the sump and collection of subsurface samples to test for the presence of soil and/or groundwater contamination from chemical spillage. The area immediately surrounding the subject property consists of commercial and light -industrial facilities to the northeast, southeast, and northwest, and a slough and fields to the southeast. A preliminary review of federal and state data base records resulted in the identification of 19 potential sites for environmental concern. mile of the subject property. However, after further review, it appears that none of these sites pose any significant risk of causing an adverse environmental situation on the subject property. 6.0 RECOMMENDATIONS The results of this Phase I Environmental Assessment reveal the existence of potential and actual site contamination, therefore, ASE recommends that more comprehensive studies be performed during a Phase R Environmental Assessment. A Phase 11 Environmental Assessment consists of sampling and analytical tests to