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.O `AGRICULTURAL Analytical Chemists February 10, 2023 Lab No. : STK2331199-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On :January 25, 2023 at 09:20 1868 East Hazelton Ave. Sampled By : Aldara Salinas Stockton, CA 95205 Received On :January 25, 2023 at 10:30 Description :Wellhead Matrix : Drinking Water Project :27851 S.Lammers Rd Tracy- WP0042874 Sample Results - Inorganic • ,. General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 842 2.5 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Calcium 166 1 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Magnesium 104 1 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Potassium 5 1 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Sodium 480 5* mg/L 5 01/27/2023 10:20 jba EPA 200.7 01/31/2023 08:22 ac Total Cations 37.8 --- meq/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Boron 1.9 0.1 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Copper ND 10 ug/L 10002 1 J 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Iron 50 30 ug/L 3002 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Manganese ND 10 ug/L 502 1 J 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Zinc ND 20 ug/L 1 J 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs SAR 7.2 0.1 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 19:30 rs Total Alkalinity(as CaCO3) 110 10 mg/L 1 01/30/2023 10:09 amm SM 4500-H+B 01/30/2023 19:47 amm Hydroxide as OH ND 10 mg/L 1 U 01/30/2023 10:09 amm SM 4500-H+B 01/30/2023 19:47 amm Carbonate as CO3 ND 10 mg/L 1 U 01/30/2023 10:09 amm SM 4500-H+B 01/30/2023 19:47 amm Bicarbonate as HCO3 140 10 mg/L 1 01/30/2023 10:09 amm SM 4500-H+B 01/30/2023 19:47 amm Sulfate 1180 6* mg/L 5002 10 01/26/2023 13:22 ldm EPA 300.0 01/27/2023 03:17 ldm Chloride 262 12* mg/L 5002 10 1 01/26/2023 13:22 ldm EPA 300.0 01/27/2023 03:17 ldm Nitrate as NO3 55.8 0.8* mg/L 45 2 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:04 ldm Nitrite as N ND 0.3* mg/L 1 2 U 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:04 ldm Nitrate+Nitrite as N 12.6 0.2* mg/L 10 2 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:04 ldm Fluoride ND 0.2* mg/L 2 2 J 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:04 ldm Total Anions 35.2 --- meq/L 1 1J 01/30/2023 10:09 amm SM 4500-H+B 01/30/2023 19:47 amm pH 7.4 --- units 1 01/25/2023 09:20 as 01/25/2023 09:20 as Specific Conductance 3240 1 umhos/cm 16002 1 01/30/2023 10:09 amm SM 4500-H+B 01/30/2023 19:47 amm Total Dissolved Solids 2450 20 mg/L 10002 1 01/27/2023 11:55 ctl SM 2540 C 01/30/2023 12:44 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 01/26/2023 18:18 jba SM 5540 C 01/26/2023 18:22 jba Aggressiveness Index 12.1 1 1 01/25/2023 09:20 as 01/25/2023 09:20 as Langelier Index(20°C) 0.1 1 1 01/25/2023 09:20 as 01/25/2023 09:20 as Nitrate Nitrogen 12.6 0.2* mg/L 10 2 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:04 ldm DQF Flags Definition: J Reported value is estimated;detected at a concentration below the RL and above the laboratory MDL. U Constituent results were non-detect. 1 The MS/MSD did not meet QC criteria. ND=Non-Detected, RL=Reporting Level*RL adusted for dilution, Dil.=Dilution MCL= Maximum Contamination Level. 2 - Secondary Standard. 3 -CDPH Notification Level.AL = Regulatory Action Level. Section: Sample Results Page 2 of 8 Page 2 of 8 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Undo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 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