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MEL ENVIRONMENTAL AGRICULTURAL Analytical Chemists August 6, 2021 San Joaquin Co. Environmental Health Dep Water Quality Division Attn: Michael Kith 1868 East Haze1ton Ave. Stockton, CA 95205 Description : Wellhead Project : 14110 Campbell Rd Lab ID : STK2139969-001 Customer ID : 3-17919 Sampled On : July 15, 2021-11:00 Sampled By : Aaron Goodenham Received On : July 15, 2021-13:25 Matrix : Drinking Water Sample Result - Inorganic Constituent Result PQL Units MCL/AL Sample Preparation Method Date/ID Sample Analysis Method Date/ID General Mineral 55g-,q5555555555 00==5,q55555 do OQ o cro do do do OQ do .0 Go Qv, Qv Qg do ao Go do do r- g- F4 t=4 r-1 r-1 r4 P4 P4 5 Total Hardness as CaCO3 163 2.5 200.7 07/16/21:208045 200.7 07/16/21:210902 Calcium 34 1 200.7 07/16/21:208045 200.7 07/16/21:210902 Magnesium 19 1 200.7 07/16/21:208045 200.7 07/16/21:210902 Potassium 3 1 200.7 07/16/21:208045 200.7 07/16/21:210902 Sodium 21 1 200.7 07/16/21:208045 200.7 07/16/21:210902 Total Cations 4.3 --- 200.7 07/16/21:208045 200.7 07/16/21:210902 Boron ND 0.1 200.7 07/16/21:208045 200.7 07/16/21:210902 Copper ND 10 10002 200.7 07/16/21:208045 200.7 07/16/21:210902 Iron ND 30 3002 200.7 07/16/21:208045 200.7 07/16/21:210902 Manganese ND 10 502 200.7 07/16/21:208045 200.7 07/16/21:210902 Zinc ND 20 200.7 07/16/21:208045 200.7 07/16/21:210902 SAR 0.7 0.1 200.7 07/16/21:208045 200.7 07/16/21:210902 Total Alkalinity (as CaCO3) 170 10 2320B 07/25/21:208271 2320B 07/26/21:211402 Hydroxide as OH ND 10 2320B 07/25/21:208271 2320B 07/26/21:211402 Carbonate as CO3 ND 10 2320B 07/25/21:208271 2320B 07/26/21:211402 Bicarbonate as HCO3 210 10 2320B 07/25/21:208271 2320B 07/26/21:211402 Sulfate 11.8 0.5 5002 300.0 07/16/21:207998 300.0 07/16/21:211044 Chloride 15 1 5002 300.0 07/16/21:207998 300.0 07/16/21:211044 Nitrate as NO3 19.6 0.4 45 300.0 07/16/21:207998 300.0 07/16/21:211044 Nitrite as N ND 0.2 1 300.0 07/16/21:207998 300.0 07/16/21:211044 Nitrate + Nitrite as N 4.4 0.1 10 300.0 07/16/21:207998 300.0 07/16/21:211044 Fluoride 0.1 0.1 2 300.0 07/16/21:207998 300.0 07/16/21:211044 Total Anions 4.4 --- 2320B 07/25/21:208271 2320B 07/26/21:211402 pH (Field) 7.44 4500-FIB 07/15/21:208211 4500HB 07/15/21:211091 Specific Conductance 445 1 16002 2510B 07/30/21:208651 2510B 07/30/21:211662 Total Dissolved Solids 350 20 10002 2540CE 07/19/21:208082 2540C 07/20/21:211025 MBAS Extraction ND 0.1 0.52 5540C 07/16/21:208150 5540C 07/16/21:210982 Aggressiveness Index 11.6 1 4500-H B 07/15/21:208211 450088B 07/15/21:211091 Langelier Index (20°C) -0.2 1 4500-H B 07/15/21:208211 45001-18 07/15/21:211091 Nitrate Nitrogen 4.4 0.1 10 300.0 07/16/21:207998 300.0 07/16/21.211044 ND-Non-Detected. PQL=Practica Quantitation Limit. * PQL adjusted for dilution. MCL = Maximum Contamination Level. 2 - Secondary Standa d. 3 - CDPH No ification Level. AL = Regulatory Action Level. Page 3 of 8 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