ARCHIVED REPORTS XR0001750 - Laserfiche WebLink

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Upon completion, each soil boring was sealed with cement/bentonite grout The grout was installed through a large funnel. The grouting was witnessed by Mr Mike Infurna, of the County, who indicated that grouting procedures were adequate ' 5.2 GROUND ATER SAMPLING Ground water was encountered in Borings B-2, B-3, and B-6 at a depth of about 28 feet below grade. Upon completion of these borings, a 3/4-inch diameter temporary well casing was installed to facilitate ground water sample collection The bottom 5 feet of casing featured 0 01-inch machine-cut slots Each temporary casing was purged to remove accumulated sediment After the water was allowed to settle, samples were collected for chemical analysis. Purging and sample collection were accomplished using a 0 5-inch diameter, stainless steel bailer. Ground water samples were decanted into 1-liter amber glass jars and 40-m1 "zero head space" glass vials with teflon-lined septa Sample bottles were immediately labeled and placed in an ice-filled cooler Soil and ground water samples were stored in separate coolers 5 3 EQUIPMENT DECONTAMINATION To minimize the potential for cross-contamination, all soil and ground water sampling equipment was thoroughly cleaned prior to first use and between successive sampling attempts In addition, all Geoprobe attachments were steam cleaned prior to first use and between successive borings. Rinsate generated from steam cleaning the augers was contained and transferred to a 55-gallon, DOT-approved, steel drum, which was placed in temporary storage on site. Procedures for soil and ground water sampling equipment cleaning included scrubbing in an Alconox detergent solution followed by one potable water rinse and one distilled water rinse. A sample of the decontamination rnnsate was collected and submitted to the laboratory for chemical analysis The sample was identified as "DECON " I 5-2 013"'CYSTE4 . 1 Consultants, Inc