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1 URS <br /> f <br /> June 11,2004 <br /> I <br /> San Joaquin Public Health Service <br /> Environmental Health Division <br /> 304 E.Weber Avenue, third Floor <br /> Stockton, California 95202 <br /> Attention: Mr. Jeffrey Wong <br /> Re: First Quarter 2004 Groundwater Monitoring Report E <br /> iFormer American Forest Products Facility <br /> Stockton,California <br /> URS Project No. 17322736 f <br /> Dear Mr.Wong: <br /> On behalf of Mr. William Bergvall, consultant for American Forest Products Company LP, URS <br /> I <br /> Corporation Americas (URS) is submitting this letter report that includes results of first quarter <br /> 4 groundwater monitoring conducted in March 2004 at the Former American Forest Products Facility, <br /> ' Stockton, California (Figures 1 and 2). Groundwater monitoring was conducted, and this report <br /> produced, following the requirements presented in a letter from Mr. Jeffrey Wong of the San Joaquin <br /> -{ County Public Health Service(PHS/EHD)dated April 16, 2003. <br /> Water levels were measured and groundwater samples were collected from site monitoring wells DMW- <br /> 1 through DMW-9 on March 19, 2004. Well construction details for all of the wells are included in ' <br /> Table 1. Field records and chain-of-custody forms are included in Appendix A. A Data Validation <br /> Summary and analytical laboratory reports are included in Appendix B. <br /> FIELD METHODS <br /> I <br /> Static water levels(Table 2) were measured prior to initiating sampling activities using an electric water <br /> level sounder. <br /> L <br /> Prior to sampling, the wells were purged to ensure representativeness of the water samples. A 2-inch- <br /> diameter Grundfos submersible pump was used for purging all of the wells with the exception of DMW- <br /> 6, which was purged using a bailer. Purge rates ranged from I to 4 gpm. Field parameters (temperature, <br /> electrical conductivity, pH and turbidity) were monitored during purging, and purging was continued <br /> until the field parameters stabilized and a minimum of three casing volumes of groundwater had been <br /> removed. Purging data were entered on Field Record of Water Sampling Forms (Appendix A). Before <br /> and after purging each well, the submersible pump was decontaminated by steam cleaning, washing in <br /> an AIconox solution,rinsing with fresh water, and final rinsing with distilled water. <br /> URS Corporation <br /> Crown Corporate Center <br /> 2870 Gateway Oaks Drive, Suite 300 <br /> Sacramento,CA 95833 <br /> I <br /> Tel: 916.679.2000 <br /> Fax:916.679.2 900 K:\Wprocess\227364kewIQ04AFP_revOl.doc <br />