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FGL ENVIRONMENTAL AGRICULTURAL Analytical Chemists June 9, 2021 San Joaquin Co. Environmental Health Dep Water Quality Division Attn: Michael Kith 1868 East Haze1ton Ave. Stockton, CA 95205 Description : Wellhead Project : 9450 N. Lower Sac Rd.,Stockton Lab ID Customer ID Sampled On Sampled By Received On Matrix : STK2137320-001 : 3-17919 : May 24, 2021-10:25 : Doria Afonskaia : May 24, 2021-12:40 : Drinking Water Sample Result - Inorganic Constituent Result PQI_ Units MCL/AL Sample Preparation Method Date/ID Sample Analysis Method Date/ID General Mineral Total Hardness as CaCO3 277 2.5 mg/L 200.7 05/25/21:205831 200.7 05/25/21:207847 Calcium 68 1 mg/L 200.7 05/25/21:205831 200.7 05/25/21:207847 Magnesium 26 1 mg/L 200.7 05/25/21:205831 200.7 05/25/21:207847 Potassium 5 1 mg/L 200.7 05/25/21:205831 200.7 05/25/21:207847 Sodium 18 1 mg/L 200.7 05/25/21:205831 200.7 05/25/21:207847 Total Cations 6.4 --- meq/L 200.7 05/25/21:205831 200.7 05/25/21:207847 Boron ND 0.1 mg/L 200.7 05/25/21:205831 200.7 05/25/21:207847 Copper ND 10 ug/L 10002 200.7 05/25/21:205831 200.7 05/25/21:207847 Iron ND 30 ug/L 300 2 200.7 05/25/21:205831 200.7 05/25/21:207847 Manganese ND 10 ug/L 50 2 200.7 05/25/21:205831 200.7 05/25/21:207847 Zinc ND 20 ug/L 200.7 05/25/21:205831 200.7 05/25/21:207847 SAR 0.5 0.1 -- 200.7 05/25/21:205831 200.7 05/25/21:207847 Total Alkalinity (as CaCO3) 240 10 mg/L 2320B 06/01/21:206053 23206 06/01/21:208223 Hydroxide as OH ND 10 mg/L 232013 06/01/21:206053 2320B 06/01/21:208223 Carbonate as CO3 ND 10 mg/L 2320B 06/01/21:206053 2320B 06/01/21:208223 Bicarbonate as HCO3 290 10 mg/L 2320B 06/01/21:206053 2320B 06/01/21:208223 Sulfate 29.0 0.5 mg/L 5002 300.0 05/25/21:205821 300.0 05/25/21:207838 Chloride 46 1 mg/L 5002 300.0 05/25/21:205821 300.0 05/25/21:207838 Nitrate as NO3 32.8 0.4 mg/L 45 300.0 05/25/21:205821 300.0 05/25/21:207838 Nitrite as N ND 0.2 mg/L 1 300.0 05/25/21:205821 300.0 05/25/21:207838 Nitrate + Nitrite as N 7.4 0.1 mg/L 10 300.0 05/25/21:205821 300.0 05/25/21:207838 Fluoride ND 0.1 mg/L 2 300.0 05/25/21:205821 300.0 05/25/21:207838 Total Anions 7.2 --- meq/L 2320B 06/01/21:206053 23206 06/01/21:208223 pH (Field) 7.4 -- units 4500-H B 05/24/21:206078 05/24/21:208225 Specific Conductance 690 1 umhos/cm 16002 2510B 06/02/21:206079 2510B 06/02/21:208227 Total Dissolved Solids 440 20 mg/L 10002 2540CE 05/26/21:205860 2540C 05/27/21:207947 MBAS Extraction ND 0.1 mg/L 0.52 5540C 05/25/21:206063 5540C 05/26/21:208187 Aggressiveness Index 12.0 1 -- 4500-H B 05/24/21:206078 05/24/21:208225 Langelier Index (20°C) 0.2 1 -- 4500-H B 05/24/21:206078 05/24/21:208225 Nitrate Nitrogen 7.4 0.1 mg/L 10 300.0 05/25/21:205821 300.0 05/25121:207838 ND=Non-Detected. PQL=Practica Quantitation Limit. * PQL adjusted for dilu ion. MCL = Maximum Contamination Level. 2 - Secondary Standard. 3 - CDPH Notification Level. AL = Regulatory Action Level. Page 3 of 9 Corporate Offices & Laboratory 853 Corporation Street Santa Paula, CA 93060 TEL: (805)392-2000 Env FAX: (805)525-4172 / Ag FAX: CA ELAP Certification No. 1573 Office & Laboratory 2500 Stagecoach Road Stockton, CA 95215 TEL: (209)942-0182 (805)392-2063 FAX: (209)942-0423 CA ELAP Certification No. 1563 Office & Laboratory 563 E. Lindo Avenue Chico, CA 95926 TEL: (530)343-5818 FAX: (530)343-3807 CA ELAP Certification No. 2670 Office & Laboratory 3442 Empresa Drive, Suite D San Luis Obispo, CA 93401 TEL: (805)783-2940 FAX: (805)783-2912 CA ELAP Certification No. 2775 Office & Laboratory 9415W. Goshen Avenue Visalia, CA 93291 TEL: (559)734-9473 FAX: (559)734-8435 CA ELAP Certification No. 2810