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Mimi Ill fill MEN October 14, 2022 . Lab No. : STK2252817-001 San Joaquin Co. Environmental Health Dep Customer No. : 3017919 Water Quality Division Attn: Steven Shih Sampled On : September 8, 2022 at 09 : 35 1868 East Hazelton Ave . Sampled By : Nascent Ahmed Stockton, CA 95205 Received On ; September 8, 2022 at 10 : 15 Description : Wellhead Matrix ; Drinking Water Project : 1481 Manila Rd. , Lathrop-WP0042024 Sample Results - Inorganic e ' e General Mineral Date Time Who Method bate Time Who . Total Hardness as CaCO3 155 2.5 mg/L 1 10/13/2022 07:00 ac EPA 2003 10/13/2022 07:14 ac Calcium 34 1 mg/L 1 10/13/2022 07:00 ac EPA 2003 10/13/2022 07:14 ac Magnesium 17 1 mg/L 1 10/13/2022 07:00 ac EPA 200.7 10/13/2022 07:14 ac Potassium 1 1 mg/L 1 10/13/2022 07:00 ac EPA 2003 10/13/2022 07:14 ac Sodium 545 5* mg/L 5 10/13/2022 07:00 ac EPA 2003 10/14/2022 08:42 be Total Cations 26.8 --- meq/L 1 10/13/2022 07:00 ac EPA 200.7 10/13/2022 07:14 ac Boron 0. 6 0. 1 mg/L 1 10/13/2022 07:00 ac EPA 2003 10/13/2022 07: 14 ac Copper 70 10 ug/L 1000' 1 10/13/2022 07:00 ac EPA 200.7 10/13/2022 07: 14 ac Iron ND 30 ug/L 300' 1 J 10/13/2022 07:00 an EPA 200.7 10/13/2022 07: 14 ac Manganese 230 10 ug/L 502 1 10/13/2022 07:00 ac EPA 200,7 10/13/2022 07: 14 ac Zino ND 20 ug/L 1 J 10/13/2022 07:00 ac EPA 200.7 10/13/2022 07:14 ac SAR 19 . 1 0. 1 -- 1 10/13/2022 07:00 ac EPA 200.7 10/13/2022 07:14 ac Total Alkalinity (as CaCO3) 350 10 ri 1 I 09/19/2022 15: 10 amm SM 4501 09/19/2022 16:51 amm Hydroxide as OH ND 10 mg/L 1 U 09/19/2022 15: 10 amm SM 4500-H+B 09/19/2022 16:51 amm Carbonate as CO3 ND 10 mg/L 1 U 09/19/2022 15: 10 amm SM 4500-H+B 09/19/2022 16:51 amm Bicarbonate as HCO3 420 10 mil 1 09/19/2022 15: 10 amm SM 4500-11+13 09/19/2022 16:51 amm Sulfate 165 0.5 mg/L 5002 1 09/09/2022 10:46 Idm EPA 300.0 09/09/2022 20:59 Idm Chloride 402 8* mg/L 500' 8 09/09/2022 10:46 Idm EPA 300.0 09/10/2022 14:09 ldm Nitrate as NO3 ND 0.4 mg/L 45 1 U 09/09/2022 10:46 ldm EPA 300.0 09/09/2022 20:59 Idm Nitrite as N ND 0. 1 Ing/L 1 1 U 09/09/2022 10:46 Idm EPA 300.0 09/09/2022 20:59 ldm Nitrate + Nitrite as N ND 0. 1 mg/L 10 1 U 09/09/2022 10:46 Idm EPA 300.0 09/09/2022 20:59 Idm Fluoride 0.2 0. 1 mg/L 2 1 09/09/2022 10:46 War EPA 300.0 09/09/2022 20:59 Idm Total Anions 21 .7 --- meq/L 1 09/19/2022 15: 10 amm SM 4500-H4 B 09/19/2022 16:51 amm pH 6, 08 --- units 1 09/00/2022 09: 35 na SM 4500-H+B 09/08/2022 09:35 na Specific Conductance 2250 1 umhos/cm 1600' 1 09/19/2022 15:10 amm SM 4500-H+B 09/19/2022 16:51 amm Total Dissolved Solids 1270 20 mg/L 1000' 1 09/12/2022 10:39 ctl SM 2540 C 09/13/2022 11 :27 ctl MBAs (foaming agents) Negative o. l mg/L 0.5' 1 U 09/09/2022 17:01 jba SM 5540 C 09/09/2022 17: 11 jba Aggressiveness Index 10.6 1 -- 1 09/08/2022 09:35 no SM 4500-H+B 09/08/2022 09:35 no Langelier Index (20°C) -1 .4 1 -- 1 1 09/08/2022 09:35 na SM 4501 09/08/2022 09:35 no Nitrate Nitrogen ND 0. 1 mg/L 10 1 U 09/09/2022 10:46 Idm EPA 300,0 09/09/2022 20:59 Idm DQF Flags Definition: J Reported value is estimated; detected at a concentration below the PQL and above the laboratory MDL. I The RPD for the laboratory duplicate exceeded laboratory criteria. U Constituent results were non-detect. ND=Non-Detected, RL=Reporting Level * RL adusted for dilution, Dil.=Dilution MCL = Maximum Contamination Level. 2 - Secondary Standard. 3 - CDPH Notification Level. AL = Regulatory Action Level, Section: Sample Results Page 2 of 8 Page 2 of 8 Corporate Offices & Laboratory Office & Laboratory Office & Laboratory Office & Laboratory Office & Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E. Undo Avenue 3442 Empresa Drive, Suite D 9415 W Goshen Avenue Santa Paula, CA 93060 Stockton, CA 95215 Chico, CA 95926 San Luis Obispo, CA 93401 Visalia, CA 93291 TEL: (805)392-2000 TEL: (209)942-0182 TEL: (530)343-5818 TEL: (805)783-2940 TEL: (559)734-9473 Env FAX: (805)525-4172 / Ag FAX: (805)392-2083 FAX: (209)942-0423 FAX: (530)343-3807 FAX: (805)783-2912 FAX: (559)734-8435 CA ELAP Certification No. 1573 0 CA ELAP Certification No, 1563 CA El Certification No. 2670 CA ELAP Certification No. 2775 CA ELAP Certification No. 2810