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.O `AGRICULTURAL Analytical Chemists October 18, 2022 Lab No. : STK2254134-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On : October 3, 2022 at 10:55 1868 East Hazelton Ave. Sampled By : Frank Giardi Stockton, CA 95205 Received On : October 3, 2022 at 14:42 Description : Wellhead Matrix : Drinking Water Project 16020 Brandt Rd., Lodi Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 52.1 2.5 mg/L 1 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Calcium 11 1 mg/L 1 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Magnesium 6 1 mg/L 1 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Potassium 4 1 mg/L 1 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Sodium 18 1 mg/L 1 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Total Cations 1.9 --- meq/L 1 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Boron ND 0.1 mg/L 1 U 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Copper ND 10 ug/L 10002 1 J 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Iron ND 30 ug/L 3002 1 J 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Manganese ND 10 ug/L 502 1 U 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Zinc 40 20 ug/L 1 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac SAR 1.1 0.1 1 10/04/2022 14:00 ac EPA 200.7 10/04/2022 17:20 ac Total Alkalinity(as CaCO3) 70 10 mg/L 1 10/07/2022 14:17 sta SM 4500-H+B 10/07/2022 18:01 sta Hydroxide as OH ND 10 mg/L 1 U 10/07/2022 14:17 sta SM 4500-H+B 10/07/2022 18:01 sta Carbonate as CO3 ND 10 mg/L 1 U 10/07/2022 14:17 sta SM 4500-H+B 10/07/2022 18:01 sta Bicarbonate as HCO3 90 10 mg/L 1 10/07/2022 14:17 sta SM 4500-H+B 10/07/2022 18:01 sta Sulfate 2 1* mg/L 5002 2 10/04/2022 10:00 ldm EPA 300.0 10/04/2022 20:48 ldm Chloride 21 2* mg/L 5002 2 10/04/2022 10:00 ldm EPA 300.0 10/04/2022 20:48 ldm Nitrate as NO3 8.4 0.8* mg/L 45 2 10/04/2022 10:00 ldm EPA 300.0 10/04/2022 20:48 ldm Nitrite as N ND 0.3* mg/L 1 2 U 10/04/2022 10:00 ldm EPA 300.0 10/04/2022 20:48 ldm Nitrate+Nitrite as N 1.9 0.2* mg/L 10 2 10/04/2022 10:00 ldm EPA 300.0 10/04/2022 20:48 ldm Fluoride 0.4 0.2* mg/L 2 2 10/04/2022 10:00 ldm EPA 300.0 10/04/2022 20:48 ldm Total Anions 2.3 --- meq/L 1 10/07/2022 14:17 sta SM 4500-H+B 10/07/2022 18:01 sta pH 8.0 units 1 T 10/07/2022 14:17 sta SM 4500-H+B 10/07/2022 18:01 sta Specific Conductance 187 1 umhos/cm 16002 1 10/07/2022 14:17 sta SM 4500-H+B 10/07/2022 18:01 sta Total Dissolved Solids 150 20 mg/L 10002 1 10/05/2022 09:40 ctl SM 2540 C 10/06/2022 11:31 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 10/04/2022 12:31 jba SM 5540 C 10/04/2022 12:33 jba Aggressiveness Index 11.3 1 1 10/07/2022 14:17 sta SM 4500-H+B 10/07/2022 18:01 sta Langelier Index(20°C) -0.5 1 1 10/07/2022 14:17 sta SM 4500-H+B 10/07/2022 18:01 sta Nitrate Nitrogen 1.9 0.2* mg/L 10 2 10/04/2022 10:00 ldm EPA 300.0 10/04/2022 20:48 ldm 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. T Exceeded method/regulatory-specific holding time. 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 3 of 8 Page 3 of 8 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