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.O `AGRICULTURAL Analytical Chemists August 12, 2022 Lab No. : STK2250420-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On :July 25, 2022 at 09:30 1868 East Hazelton Ave. Sampled By : Aaron Gooderham Stockton, CA 95205 Received On :July 25, 2022 at 12:25 Description : Wellhead Matrix : Drinking Water Project 22516 Alice Rd.-WP0043292 Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 51.4 2.5 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Calcium 14 1 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Magnesium 4 1 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Potassium 3 1 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Sodium 59 1 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Total Cations 3.7 --- meq/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Boron 0.2 0.1 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Copper ND 10 ug/L 10002 1 U 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Iron ND 30 ug/L 3002 1 U 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Manganese 30 10 ug/L 502 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Zinc ND 20 ug/L 1 U 07/29/2022 08:00 ac EPA 200.7 08/01/2022 15:01 ac SAR 3.6 0.1 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 15:55 ac Total Alkalinity(as CaCO3) 120 10 mg/L 1 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:54 amm Hydroxide as OH ND 10 mg/L 1 U 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:54 amm Carbonate as CO3 ND 10 mg/L 1 U 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:54 amm Bicarbonate as HCO3 150 10 mg/L 1 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:54 amm Sulfate 11.6 0.5 mg/L 5002 1 07/26/2022 11:25 mca EPA 300.0 07/26/2022 15:13 mca Chloride 26 1 mg/L 5002 1 07/26/2022 11:25 mca EPA 300.0 07/26/2022 15:13 mca Nitrate as NO3 6.6 0.4 mg/L 45 1 07/26/2022 11:25 mca EPA 300.0 07/26/2022 15:13 mca Nitrite as N ND 0.1 mg/L 1 1 J 07/26/2022 11:25 mca EPA 300.0 07/26/2022 15:13 mca Nitrate+Nitrite as N 1.5 0.1 mg/L 10 1 07/26/2022 11:25 mca EPA 300.0 07/26/2022 15:13 mca Fluoride 0.1 0.1 mg/L 2 1 07/26/2022 11:25 mca EPA 300.0 07/26/2022 15:13 mca Total Anions 3.5 --- meq/L 1 J 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:54 amm pH 7.19 --- units 1 07/25/2022 09:30 ag SM 4500-H+B 07/25/2022 09:30 ag Specific Conductance 369 1 umhos/cm 16002 1 07/29/2022 08:43 sta. SM 2510 B 07/29/2022 08:43 sta. Total Dissolved Solids 240 20 mg/L 10002 1 07/27/2022 09:49 ctl SM 2540 C 07/28/2022 10:58 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 07/26/2022 14:03 jba SM 5540 C 07/26/2022 14:20 jba Aggressiveness Index 10.8 1 1 07/25/2022 09:30 ag SM 4500-H+B 07/25/2022 09:30 ag Langelier Index(20°C) -1.0 1 1 07/25/2022 09:30 ag SM 4500-H+B 07/25/2022 09:30 ag Nitrate Nitrogen 1.5 0.1 mg/L 10 1 07/26/2022 11:25 mca EPA 300.0 07/26/2022 15:13 mca DQF Flags Definition: U Constituent results were non-detect. J Reported value is estimated;detected at a concentration below the PQL and above the laboratory MDL. ND=Non-Detected, RL=Reporting Level, Dil.=Dilution MCL= Maximum Contamination Level. 2 - Secondary Standard. 3 -CDPH Notification Level.AL= Regulatory Action Level. Section: Sample Results Page 2 of 7 Page 2 of 7 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo 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