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Unregulated Chemicals Requiring Monitoring & Detections Page 1 of 2 <br /> * : CALF R A T W E G 0 L b E. N 5 T A T E CALIFORNIA HC <br /> WOh1EPAGE WC <br /> lyDrinking Water Standards <br /> Unregulated Chemicals Requiring Monitoring <br /> i Last Update: February 8, 2002 <br /> r. <br /> Unregulated Chemicals Requiring Monitoring* are "unregulated" in that they lack drinking wa <br /> standards, also called maximum contaminant level (MCLS). However, these chemicals are includec ` <br /> regulation --Title 22 of the California Code of Regulations §64450, which became effective ]anuary j <br /> 2001. <br /> E The following table includes the unregulated chemicals for which monitoring is required, along with <br /> methods, and preliminary detection levels for purposes of reporting (DLRs). Also included are resL <br /> monitoring data and, where appropriate, the chemical's drinking water advisory action level. <br /> i <br /> For additional information, see Guidance for Unregulated Chemicals Requiring Monitoring, <br /> G <br /> UNREGULATED CHEMICALS REQUIRING MONITORING <br /> (see 22 CCR §64450) <br /> Sources: <br /> #positive/ Chemical Method DLR Action Level <br /> #sampled (symbol or synonym) (mg/L) (mg/L) <br /> 1984-2001 <br /> C A Inorganics <br /> 7�`I 0- <br /> 1,759/4,534 11200.7 and 200.8 0.1 1 <br /> 13'p_-bZ_a 1,345/2,377 Chromium VI (CrVI, Cr-6):]l 218.6 IL 0.001 n/a 1 <br /> 259/3,547 _11Perchlorate (CIO 4-) _1[: 314 11 0.004 0.004 <br /> 7�-tqb.-(�� -Z 1,438/2,259 Vanadium (V) 200.8 and 200.9 0.003 0.05 <br /> I� Organics <br /> [-14=6/15Dichlorodifluoromethane 524.2 and 502.2 : 0.0005 1 <br /> (Freon 12) <br /> ' 0/5,237 Ethyl tertiary butyl ether 524.2 and 502.2IL 0.003 -- <br /> (ETBE) <br /> 1� <br /> 0/5, <br /> 268 Tertiary amyl methyl ether 524.2 and 502.2 0.003 -- <br /> q (TAME) <br /> '. 1/2,026 Tertiary butyl alcohol (TBA} .52 1 0.002 0.012 ; <br /> F <br /> 1,2,3-Trichloropropane LLE-GC/MS & <br /> PT- 0.000005 0.000005 <br /> 28/11,555 2 <br /> 1 2,3-TCP) GC/MS <br /> 1 Not applicable: currently regulated under the MCL for`total chromium <br /> -http://www.dhs.ca.gov/ps/ddwem/chemicals/unregulated/index.htm 2/20/2002 <br />