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.O `AGRICULTURAL <br /> Analytical Chemists <br /> October 2, 2026 <br /> Lab No. : STK2654381-001 <br /> San Joaquin Co. Environmental Health Dep Customer No.: 3017919 <br /> Water Quality Division <br /> Attn: Scott Sanglaang Sampled On : September 22, 2026 at 10:30 <br /> 1868 East Hazelton Ave. Sampled By : Aaron Gooderham <br /> Stockton, CA 95205 Received On : September 22, 2026 at 11:55 <br /> Description : Wellhead Matrix : Drinking Water <br /> Project 11450 Jahant Road-AP2502240 <br /> Sample Results - Inorganic <br /> General Mineral Date Time Who Method Date Time Who <br /> Total Hardness as CaCO3 67.8 2.5 mg/L 09/24/2026 14:20 ac 2340B 09/26/2026 03:13 ac <br /> Calcium 14 1 mg/L 1 09/24/2026 14:20 ac EPA 200.7 09/26/2026 03:13 ac <br /> Magnesium 8 1 mg/L 1 09/24/2026 14:20 ac EPA 200.7 09/26/2026 03:13 ac <br /> Potassium 2 1 mg/L 1 09/24/2026 14:20 ac EPA 200.7 09/26/2026 03:13 ac <br /> Sodium 20 1 mg/L 1 1 09/24/2026 14:20 ac EPA 200.7 09/26/2026 03:13 ac <br /> Total Cations 2.3 meq/L 09/24/2026 14:20 ac Calc. 09/26/2026 03:13 ac <br /> Boron ND 0.1 mg/L 1 U 09/24/2026 14:20 ac EPA 200.7 09/26/2026 03:13 ac <br /> Copper ND 10 ug/L 10002 1 U 09/24/2026 14:20 ac EPA 200.7 09/26/2026 03:13 ac <br /> Iron ND 30 ug/L 3001 1 U 09/24/2026 14:20 ac EPA 200.7 09/26/2026 03:13 ac <br /> Manganese ND 10 ug/L 502 1 U 09/24/2026 14:20 ac EPA 200.7 09/26/2026 03:13 ac <br /> Zinc ND 20 ug/L 5000 1 U 09/24/2026 14:20 ac EPA 200.7 09/26/2026 03:13 ac <br /> SAR 1.1 09/24/2026 14:20 ac Calc. 09/26/2026 03:13 ac <br /> Total Alkalinity(as CaCO3) 80 10 mg/L 1 09/27/2026 15:22 amm SM 4500-H+B 09/27/2026 23:10 amm <br /> Hydroxide as OH ND 10 mg/L 1 U 09/27/2026 15:22 amm SM 4500-H+B 09/27/2026 23:10 amm <br /> Carbonate as CO3 ND 10 mg/L 1 U 09/27/2026 15:22 amm SM 4500-H+B 09/27/2026 23:10 amm <br /> Bicarbonate as HCO3 100 10 mg/L 1 09/27/2026 15:22 amm SM 4500-H+B 09/27/2026 23:10 amm <br /> Sulfate 1.9 0.5 mg/L 500, 1 09/24/2026 14:45 ldm EPA 300.0 09/24/2026 21:08 ldm <br /> Chloride 14 1 mg/L 5002 1 09/24/2026 14:45 ldm EPA 300.0 09/24/2026 21:08 ldm <br /> Nitrate as NO3 9.3 0.4 mg/L 45 1 09/23/2026 13:00 mml SM 4500-NO3 F 09/23/2026 13:22 mml <br /> Nitrite as N ND 0.2 mg/L 1 1 U 09/23/2026 13:00 mml SM 4500-NO3 F 09/23/2026 13:21 mml <br /> Nitrate+Nitrite as N 2.1 0.4 mg/L 10 1 09/23/2026 13:00 mml SM 4500-NO3 F 09/23/2026 13:22 mml <br /> Fluoride 0.3 0.1 mg/L 2 1 09/24/2026 14:45 ldm EPA 300.0 09/24/2026 21:08 ldm <br /> Total Anions 2.2 meq/L 09/24/2026 14:45 ldm Calc. 09/24/2026 21:08 ldm <br /> pH 7.2 --- units 1 09/22/2026 10:30 ag SM 4500-H+B 09/22/2026 10:30 ag <br /> Specific Conductance 220 1 umhos/cm 16002 1 09/27/2026 15:22 amm SM 4500-H+B 09/27/2026 23:10 amm <br /> Total Dissolved Solids 200 20 mg/L 10002 1 09/24/2026 11:45 ctl SM 2540 C 09/25/2026 12:00 ctl <br /> MBAS(Screen) Negative 0.1 mg/L 1 U 09/23/2026 18:00 mct SM 5540 C 09/23/2026 18:06 mct <br /> Aggressiveness Index 10.6 10 --- 09/24/2026 14:20 ac Calc. 09/26/2026 03:13 ac <br /> Langelier Index(20°C) -1.2 20 --- 09/24/2026 14:20 ac Calc. 09/26/2026 03:13 ac <br /> Nitrate Nitrogen 2.1 0.4 mg/L 10 1 09/23/2026 13:00 mml SM 4500-NO3 F 09/23/2026 13:22 mml <br /> DQF Flags Definition: <br /> 1 The MS/MSD did not meet QC criteria. <br /> U Constituent results were non-detect. <br /> ND=Non-Detected, RL=Reporting Level, Dil.=Dilution <br /> MCL= Maximum Contamination Level. 2 - Secondary Standard. 3-CDPH Notification Level.AL = Regulatory Action Level. <br /> Section: Sample Results Page 2 of 8 <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Undo Avenue 3442 Empresa Drive,Suite D 9411 W.Goshen Avenue <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 <br /> TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 <br /> CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 <br />