ARCHIVED REPORTS_XR0012724 - Laserfiche WebLink

Home Browse Search

M- MLMI;d"sW'2 � �' " +" " a. 4.9 ANALYTICAL TESTING All soil samples were delivered for analytical testing to Calscience Environmental Laboratories, Inc. , a California Department of Health services ;DOHS) certified hazardous waste testing laboratory (Certificate #257) located in Stanton, California. All soil samples were tested for TPH using modified EPA Method 8015. Additionally, the soil samples from beneath the sewer line were tested for volatile organic compounds (VOCs) using EPA Method 8240, and the soil samples from beneath the product lines were tested for BTXE using EPA Method 8020. The results of the testing are shown on Tables 1 and 2. The laboratory reports are contained in Appendix C. 5.o DISCUSSION 5.1 SEWER LINE SAMPLES No TPH were detected in any of the three soil samples associated with the sewer line. However, minor concentrations of BTXE, bro:moform, carbon disulfide, chloroform, tetrachloroethane, trichloroethene, 1,1,2,2-tetrachloroethane, 1,1,1--trichloroethane and 1,1,2-trichloroethane were detected (see Table 1) . E 5.2 PRODUCT LINE SAMPLES " TPH (844 ppm) , ethylbenzene (0.65 ppm) and xylenes (9.55 ppm) were only detected in soil sample PL-7 @ 4-4.51 . Benzene was not detected in any soil samples collected beneath the product lines. Toluene was detected in three soil samples with � q concentrations ranging from 0.07 ppm to 0.95 ppm (see Table 2) . 6.0 CONCLUSIONS Based upon the data contained in the reports referenced in Section 1.0, and from completion of the investigations associated with the sewer and product lines, the following are concluded: Ground water was not encountered in any of the borings (maximum depth of 51.5 feet bgs) , drilled as part of the investigations completed to date. The depth to ground water at the Site is believed to exceed 60 feet bgs. 3 - Project No. 1232 --5-- ENVIN0,VN WTU Wim,,,xc.