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Citation No. 03-10-07C-004 NCYCC Page 2 z: 2 ° standard for Tetrachloroethylene (PCE) as specified in Section 64444 Maximum 3 Contaminant Levels — Organic Chemicals of Title 22, California Code of Regulations 4 (hereinafter 22CCR) during the month of March 2007. 5 6 Section 64444 specifies; The MCLs for the primary drinking water chemicals shown in 7 Table 64444-A shall not be exceeded in the water supplied to the public. NCYCC 8 exceeded the PCE.MCL of 0.005 mg/I in two samples collected on March 26, 2007 from 9 an indoor faucet at the institution, which had PCE concentrations of 0.0070 mg/I and 10 0.0072 mg/l respectively. 11 12 Section .64445.1(c) requires confirmation when organic chemicals are detected. 13 Confirmation of the initial finding shall be shown by the presence of the organic 14 chemical in either the first or second additional sample, and the detected level of the 15 contaminant for compliance purposes shall be the average of the initial and confirmation 16 sample(s). 17 18 The Department directed NCYCC to sample all wells and sample from the same indoor 19 faucet where the March 26th samples had been collected. Samples were collected from 20 three of the wells and the indoor faucet on April 12, 2007. The PCE concentration from 21 the indoor faucet sample was 0.0083 mg/I. Well No. 2 had a PCE concentration of 22 0.0088 mg/l, Well No. 4 had a non -detection of PCE (reporting limit was 0.000 - mg/1), 23 and Standby Well No. 3 had a PCE concentration of 0.016 mg/I. However, Standby 24 Well No. 3 has not been pumped into the system since 2000. Well No. 3 is only turned 25 on and pumped to waste for sample collection. The average of the three indoor faucet 26 samples was 0.0075 mg/l, which confirmed a violation of the PCE MCL of 0.005_mg/l 27 J� • -• couxr Parer STATCOT C►:rTURNr• ice' ST*' ,9 1NEr• e.731 t PS