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-- J VOCs wont detected above method detectiorwits in the samples from this location. VSOCs diethyl phthalate and phenol were detected at 9.8 µg/L and 20 µg/L, respectively. Total metals were detected as follows: arsenic at 0.20 mg/L; barium at 8.3 mg/L; beryllium at 0.011 mg/L; chromium at 1.6 mg/L; cobalt at 0.37 mg/L; copper at 0.50 mg/L; lead at 0.16 mg/L; mercury at 0.00069 mg/L; f molybdenum at 0.13 mg/L; nickel at 2.4 mg/L; thallium at 0.16 mg/L; LI vanadium at 2.1 mg/L, and zinc at 2.8 mg/L. Dissolved metals were detected as follows: barium at 3.1 mg/L; chromium at 0.044 mg/L; copper at 0.027 mg/L; lead at 0.0067 mg/L; nickel at 0.26 mg/L; and zinc at 1.1 mg/L. 3.3 DATA EVALUATION 7 A summary of ground water analytical data as compared with state and federal maximum contaminant levels (MCLS) is included in Table 1. MCLs are part of the drinking water standards adopted both by the California Department of 7 Health Services (DHS), Office of Drinking Water in Title 22 of the California Code of Regulations (CCR), Division 4, Chapter 15, "Domestic Water Quality and Monitoring" and by the U.S. EPA under the Safe Drinking Water Act 7 (Staff Report of the California Regional Water Quality Control Board-Central Valley Region 1993). If MCLS are not established for particular constituents, 7 other contaminant limits such as agricultural water quality goals and taste/odor thresholds may be utilized by regulatory agencies to determine levels of contamination. 7 Low concentrations of diethyl phthalate, a plasticizer that is ubiquitous in plastics, were detected in ground water samples collected from sample 7 locations LH-1R and LH-5. Concentrations appeared higher in LH-5, the assumed up-gradient location, than in LH-IR, the assumed down-gradient location. Although diethyl phthalate was detected in concentrations above analytical method detection limits, the concentrations were well below the MCL of 5,000 µg/L which is a proposed EPA MCL goal for diethyl phthalate. ..L Concentrations of phenols exceed the taste/odor threshold of 5.0 µg/L L (established by the DHS) in ground water samples from locations LH-1R and LH-5. Concentrations appeared higher in LH-5, the assumed up-gradient 'L location, than in LH-1R, the assumed down-gradient location. Ground water samples were analyzed for both total and dissolved metal concentrations. The a� dissolved metals (i.e., filtered) are generally most critical in terms of 28 U450N.o ZI1 ERM-WEST.INC.