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M- 1 <br /> 8n+ t ; �<.• a` - rte <br /> May 8, 1989 Herding Lamson Associates <br /> tr 17060,022.03 <br /> Mr. Hal Miller <br /> The Southland Corporation <br /> Page 2 <br /> HLA prepared a "Problem Assessment Report" dated -snuary <br /> 1989, for this site and Southland submitted it to the <br /> Central valley Regional water Quality Control Board <br /> (CVRWQCB) . That report presents the results of the site <br /> characterization and remediation feasibility study, along <br /> with recommendations for remediation. Remediation of the <br /> site is presently delayed because the CVRWQCB has neither <br /> reviewed the report nor approved any remedial alternatives. <br /> We understand that Southland was recently able to schedule a <br /> meeting in early May with the CVRWQCB to discuss the status <br /> Df the remedial investigation. <br /> FIELD PROCEDURES <br /> i On March 21. and 22, 1989, fold technicians opened all <br /> monitoring wells and measured water levels in each. Prior <br /> to sampling, allwells were purged of at least three casing <br /> i volumes of water. Purging was considered complete when the <br /> water appeared clear and our measurements of its <br /> r temperature, conductivity, and pH had stabilized. Water <br /> samples were collected, using a clean stainless steel <br /> bailer, and decanted into 40-ml volatile organic analysis <br /> (VOA) vials. . All samples were stored in a cooled ice chest <br /> until delivery to the chemical testing laboratory, <br /> Analytical Science Associates, Inc. , in Danville, <br /> E California: A chain-of-custody record was maintained for <br /> each sample collected. <br /> To prevent cross-contamination of wells, all sampling <br /> equipment was cleaned between wells with a solution of <br /> 6 trisodium phosphate, and rinsed with distilled water. <br /> Discharge water from the wells was collected in labeled 55- <br /> gallon drums and stored on site. In accordance with Mr. <br /> Lubcke's request, disposal of all drummed water was handled . <br /> G by Southland. <br /> i <br /> z <br /> -- f CHEMICAL ANALYSES <br /> S Table I summarizes the chemical analyses performed on the <br /> water samples collected. The analyses are consistent with <br /> those performed during the site investigation and <br /> characterization. <br /> q. - <br />