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xu k TABLE OF CONTENTS Page 1.0 INTRODUCTION. . . . . . . . . . . . . . . . • • • • 1.1 BACKGROUND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 PURPOSE OF THIS INVESTIGATION. . . . . . . . . . . . 2.0 FIELD INVESTIGATION. . . . . . . . . . . . . . . . . . . . . . . f` 2.1 INVESTIGATION OF SEWER LINE. . . . . . . . . . . . . . . . . . . . 2.2 INVESTIGATION OF PRODUCT LINES. . . . . . . . . . . . . . . . . . 3 2.3 SAMPLING EQUIPMENT CLEANING PROTOCOL. . . . . . . . . . . . . . . 4 2.4 EFFLUENT HANDLING. . . . . . . . . . . . . . . . . . . . . . . . . 4 3.0 SUBSURFACE CONDITIONS. . . . . . . . . . . . . . . . . . . . . . . . . 4.0 ANALYTICAL TESTING. . . . . . . . . 5.0 DISCUSSION. . . . . . . . . . . . . . . . . . . . 5.1 SEWER LINE SAMPLES. . . . . . . . . . . . . 5 5.2 PRODUCT LINE SAMPLES. . . . . . . . . . . . . . . • . . . . . . 6,0 CONCLUSIONS. . . . . . . . . . . . . . . . . . . . . . . 5 . . . . . 7.0 PROPOSED WORK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7.1 PRODUCT LINES. . . . . . . . . . . . . . . . . . . . . . . . . . 6 7.2 SEWER LINE. . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . 6 ' 7.3 DRILLING AND SOIL SAMPLING. . . . . . . 7 + 7.4 FIELD SCREENING OF SOIL SAMPLES. . . . . . . . . . . . . . . . . . • . 7 7.5 EFFLUENT HANDLING. . . . . . . . . . . . . . . . . . . . • . . . . .. . . . . 7 t 7.6 ANALYTICAL TESTING. . . . . . . . . . . . . . . . . . . . . . . 8.0 PROPOSED SCHEDULE. . . . . . . . . . . . . . . . 8 9.0 LIMITATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TABLES: f = AND t? TABLE 1' OBTAINED BELOW SEWER LINE CSAMPLESS IN SOIL CONCENTRATIONS OF LINE ONSEPTEMBER 12, 1991 TABLE 2: CONCENTRATIONS OF TPH AND BTXE IN SOIL SAMPLES OBTAINED BELOW PRODUCT LINES ON SEPTEMBER 12 AND 13, 1991 Project No. 12,2 VIHOiV�VEPdTA1,AUDIT,IIVC. i ., t i