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DAMES & MOORE _PR0IFL��I0N-NL LIk11TEP PARTN}R•Hif �- 221 MAIN STREET SUITE 600,SAN FRANCISCO CALIFORNIA 94105 1917 (41-)1 „+ I- February 17, 1989 Job No. 15884-009-43 San Joaquin Local Health District 1601 East Hazelton Avenue Stockton, California 95205 Attn: Ms. Diane M. Hinson Ref: Letter Report Groundwater Monitoring American Moulding and Millwork 2800 West Lane Stockton, California Dear Ms . Hinson: INTRODUCTION This letter report presents the results of the most recent groundwater sampling activities performed by Dames & Moore at the American Moulding and Millwork facility in Stockton, California. Dames & Moore performed this groundwater sampling and analysis on behalf of American Forest Products Company (AFDC) , the former owner and operator of the facility. The groundwater sampling and analysis was performed in accordance with the Work Plan for Additional Groundwater Investigation dated November 18 , 1988 and the Revision to the Work Plan dated January 23 , 1989 previously submitted to and approved by San Joaquin Local Health District. FIELD SAMPLING Dames & Moore performed the groundwater sampling on January 31, 1989. The Work Plan called for sampling and analysis of the three existing monitoring wells (MW-1 , MW-2, and MW-3 ) and one inactive on-site production well. The locations of the three monitoring wells is shown of Figure 1 and the location of the production well is shown of Figure 2. Monitoring wells MW-1 (total depth 48 ft. ) and MW-3 (total depth 51 feet) were both dry and groundwater samples could not be obtained. Monitoring well MW-2 (total depth 51 ft) contained approximately 2 feet of water. Prior to sampling of MW-2 , 3 . 5 gallons of water was evacuated from the well using a dedicated polyethylene bailer. Following recovery of the water level , a I-rli e-u.+RLOA 1 `t