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ENVIRONMENTAL ----- AGRICULTURAL Analytical Chemists July 14, 2021 San Joaquin Co. Environmental Health Dep Water Quality Division Attn: Michael Kith 1868 East Hazelton Ave. Stockton, CA 95205 Description : Wellhead Project : 13860 Neeley Rd.,Lodi Lab B3 Customer ID Sampled On Sampled By Received On Matrix : STK2138920-001 : 3-17919 : June 24, 2021-13:20 : Naseem Ahmed : June 24, 2021-14:15 : Drinking Water Sample Result - Inorganic Constituent Result PQL Units MCL/AL Sample Preparation Method Date/ID Sample Analysis Method Date/ID General Mineral Total Hardness as CaCO3 1 75 2.5 mg/L 200.7 06/28/21:207231 200.7 06/28/21:209813 Calcium 37 1 mg/L 200.7 06/28/21:207231 200.7 06/28/21:209813 Magnesium 20 1 mg/L 200.7 06/28/21:207231 200.7 06/28/21:209813 Potassium 4 1 mg/L 200.7 06/28/21:207231 200.7 06/28/21:209813 Sodium 30 I mg/L 200.7 06/28/21:207231 200.7 06/28/21:209813 Total Cations 4.9 --- meq/L 200.7 06/28/21:207231 200.7 06/28/21:209813 Boron ND 0.1 mg/L 200.7 06/28/21:207231 200.7 06/28/21:209813 Copper ND 10 ug/L 10002 200.7 06/28/21:207231 200.7 06/28/21:209813 Iron ND 30 ug/L 3002 200.7 06/28/21:207231 200.7 06/28/21:209813 Manganese ND 10 ug/L 502 200.7 06/28/21:207231 200.7 06/28/21:209813 Zinc ND 20 ug/L 200.7 06/28/21:207231 200.7 06/28/21:209813 SAR 1.0 0.1 -- 200.7 06/28/21:207231 200.7 06/28/21:209813 Total Alkalinity (as CaCO3) 110 10 mg/L 2320B 07/05/21:207518 2320B 07/06/21:210188 Hydroxide as OH ND 10 mg/L 23208 07/05/21:207518 23208 07/06/21:210188 Carbonate as CO3 ND 10 mg/L 23208 07/05/21:207518 2320B 07/06/21:210188 Bicarbonate as HCO3 140 10 mg/L 23208 07/05/21:207518 23208 07/06/21:210188 Sulfate 5.1 0.5 mg/L 5002 300.0 06/25/21:207151 300.0 06/25/21:209708 Chloride 92 1 mg/L 5002 300.0 06/25/21:207151 300.0 06/25/21:209708 Nitrate as NO3 4.6 0.4 mg/L 45 300.0 06/25/21:207151 300.0 06/25/21:209708 Nitrite as N ND 0.2 mg/L 1 300.0 06/25/21:207151 300.0 06/25/21:209708 Nitrate + Nitrite as N 1 0.1 mg/L 10 300.0 06/25/21:207151 300.0 06/25/21:209708 Fluoride ND 0.1 mg/L 2 300.0 06/25/21:207151 300.0 06/25/21:209708 Total Anions 5.1 --- meq/L 2320B 07/05/21:207518 23208 07/06/21:210188 pH (Field) 7.62 --- units 4500-H B 06/24/21:207425 06/24/21:210018 Specific Conductance 539 1 umhos/cm 16002 2510B 07/12/21:207787 2510B 07/12/21:210504 Total Dissolved Solids 380 20 mg/L 10002 2540CE 06/29/21:207275 2540C 06/30/21:209934 MBAS Extraction ND 0.1 mg/L 0.5 2 5540C 06/25/21:207589 5540C 06/25/21:210243 Aggressiveness Index 11.6 1 -- 4500-H B 06/24/21:207425 06/24/21:210018 Langelier Index (20°C) -0.2 1 -- 4500-H B 06/24/21:207425 06/24/21:210018 Nitrate Nitrogen 1 0.1 mg/L 10 300.0 06/25/21:207151 300.0 06/25/21:209708 ND-Non-Detected. PQL=Practica Quantitation Emit. * PQL adjusted for dilut'on. 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. Undo 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 8, Laboratory 9415W. Goshen Avenue Visalia, CA 93291 TEL: (559)734-9473 FAX: (559)734-8435 CA ELAP Certification No. 2810