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ENVIRONMENTAL AGRICULTURAL Lab ID : 5TK2150124-001 Customer ID : 3-17919 August 12, 2021 San Joaquin Co. Environmental Health Dep Water Quality Division Attn: Michael Kith 1868 East Haze1ton Ave. Stockton, CA 95205 Description : Wellhead Project : 16948 Lawrence Rd Sampled On Sampled By Received On Matrix : July 19, 2021-14:27 : Aaron Goodenham : July 19, 2021-15:05 : Drinking Water Sample Result - Inorganic Constituent Result PQL Units MCL/AL ' Sample Preparation Method Date/ID Sample Analysis Method Date/1D General Mineral 4E bb.411 4441414"414Mil°440iE Total Hardness as CaCO3 104 2.5 200.7 07/20/21:208190 200.7 07/20/21:211095 Calcium 22 I 200.7 07/20/21:208190 200.7 07/20/21:211095 Magnesium 12 I 200.7 07/20/21:208190 200.7 07/20/21:211095 Potassium 4 1 200.7 07/20/21:208190 200.7 07/20/21:211095 Sodium 21 1 200.7 07/20/21:208190 200.7 07/20/21:211095 Total Cations 3.1 --- 200.7 07/20/21:208190 200.7 07/20/21:211095 Boron ND 0.1 200.7 07/20/21:208190 200.7 07/20/21:211095 Copper ND 10 10002 200.7 07/20/21:208190 200.7 07/20/21:211095 Iron ND 30 3002 200.7 07/20/21:208190 200.7 07/20/21:211095 Manganese ND 10 502 200.7 07/20/21:208190 200.7 07/20/21:211095 Zinc ND 20 200.7 07/20/21:208190 200.7 07/20/21:211095 SAP. 0.9 0.1 200.7 07/20/21:208190 200.7 07/20/21:211095 Total Alkalinity (as CaCO3) 110 10 2320B 07/27/21:208496 2320B 07/28/21:211555 Hydroxide as OH ND 10 2320B 07/27/21:208496 23208 07/28/21:211555 Carbonate as CO3 ND 10 2320B 07/27/21:208496 23208 07/28/21:211555 Bicarbonate as HCO3 140 10 23208 07/27/21:208496 2320B 07/28/21:211555 Sulfate 6.3 0.5 5002 300.0 07/20/21:208210 300.0 07/20/21:211218 Chloride 7 1 5002 300.0 07/20/21:208210 300.0 07/20/21:211218 Nitrate as NO3 22.4 0.4 45 300.0 07/20/21:208210 300.0 07/20/21:211218 Nitrite as N ND 0.2 1 300.0 07/20/21:208210 300.0 07/20/21:211218 Nitrate + Nitrite as N 5.1 0.1 10 300.0 07/20/21:208210 300.0 07/20/21:211218 Fluoride 0.2 0.1 2 300.0 07/20/21:208210 300.0 07/20/21:211218 Total Anions 3.0 --- 2320B 07/27/21:208496 2320B 07/28/21:211555 pH (Field) 7.49 --- 4500-H B 07/19/21:208430 4500110 07/19/21:211381 Specific Conductance 299 I 16002 2510B 07/28/21:208530 2510B 07/28/21:211520 Total Dissolved Solids 250 20 10002 2540CE 07/21/21:208232 2540C 07/22/21:211191 MBAS Extraction ND 0.1 0.52 5540C 07/20/21:208408 5540C 07/20/21:210983 Aggressiveness Index 11.3 1 4500-H B 07/19/21:208430 4500HB 07/19/21:211381 Langelier Index (20°C) -0.6 1 4500-118 07/19/21:208430 4500118 07/19/21:211381 Nitrate Nitrogen 5.1 0.1 10 300.0 07/20/21:208210 300.0 07/20/21:211218 ND=Non-Detected. PQL-Practical Quantitation Limit. * PQL adjusted for dilu ion. MCL = Maximum Contamination Level. 2 - Secondary Standard. 3 - CDPH No ification 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. Office & Laboratory 3442 Empresa Drive, Suite D San Luis Obispo, CA 93401 TEL: (805)783-2940 FAX: (805)783-2912 2670 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