SITE INFORMATION AND CORRESPONDENCE

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HEALTHFOOTHIL Y. ;T F,t' iCE ENGINEERING 12793 PADDY CREEK LANE LODI. CA 96240 5G AT 424 AM t0: 2C PH. (209) 368-9381 FAX (209) 367-1163 Ms. Linda Turkatte July 17, 1996 San Joaquin County Public Health Services Environmental Health Division P. O. Box 388 Stockton, CA 95201 Subject: Phase 1 Site Investigation Report Burlington Brothers (aka San Joaquin Sulfur Co.) 711 N. Sacramento Street Lodi, CA 95240 SITE CODE: 2040 CONTRACTOR 9: 39000 Dear Ms. Turkatte; This report will serve to document the Phase I Site Investigation completed as of the above stated date. The report includes information from soil sampling and groundwater sampling completed under the direction of this office and the (PHS-EHD). SOUL SAMPLING On May, 28, 1996 Spectrum Exploration made a soil boring to a depth of fifty feet below the location shown on the enclosed map. The boring was done with a standard eight inch hollow stem auger. Standard BX brass tube samples were driven for every five feet of bore depth. Three samples were taken at each depth and the tube with the best recovery was selected for laboratory analysis. The samples were transported under chain of custody to Sherwood Labs of Hilmar, California. The results of that analysis are summarized on page 3 of this report. A soil boring log was maintained by the author of this report and is enclosed in the appendix. The original soil sample analysis report for this soil boring is included in the appendix of this report. GROUNDWATER MONITORING WELL CONSTRUCTION A four-inch PVC cased monitoring well was constructed at the location of the soil boring. The soil was rimmed to twelve inches to receive the sand filter and casing. A bentonite plug and cement slurry filler were installed as shown on the monitoring well construction diagram enclosed in the appendix. The monitoring well was developed and purged by Del-Tech Geotechnical Support Services on July 7, 1996 under the direction of the author. The resulting groundwater from the monitoring well was clear and suitable for sampling. GROUNDWATER SAMPLING Del-Tech Geotechnical Support Services extracted a groundwater sample from the monitoring well after purging the well. The water sample was transported under chain of custody to Sherwood Labs of Hilmar, California for analysis. A summary of the results of this analysis is shown on page 3 of this report. A copy of the original analysis report from Sherwood Labs is included in the appendix.