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ENVIRONMENTAINW. . , Analytical Chemists February 10, 2023 Lab No. : STK2330537-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On :January 12, 2023 at 10:25 1868 East Hazelton Ave. Sampled By : Francisco Garcia Rui Stockton, CA 95205 Received On :January 12, 2023 at 11:11 Description Wellhead Matrix : Drinking Water Project 26860 Elliot Rd.,Acampo 95220 Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 57.1 2.5 mg/L 1 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Calcium 13 1 mg/L 1 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Magnesium 6 1 mg/L 1 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Potassium 2 1 mg/L 1 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Sodium 13 1 mg/L 1 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Total Cations 1.8 --- meq/L 1 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Boron ND 0.1 mg/L 1 J 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Copper ND 10 ug/L 10002 1 J 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Iron ND 30 ug/L 3002 1 J 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Manganese ND 10 ug/L 502 1 J 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Zinc 20 20 ug/L 1 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs SAR 0.7 0.1 1 01/16/2023 12:11 jba EPA 200.7 01/17/2023 03:27 rs Total Alkalinity(as CaCO3) 70 10 mg/L 1 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 19:59 sta Hydroxide as OH ND 10 mg/L 1 U 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 19:59 sta Carbonate as CO3 ND 10 mg/L 1 U 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 19:59 sta Bicarbonate as HCO3 80 10 mg/L 1 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 19:59 sta Sulfate 2.6 0.5 mg/L 5002 1 lb 01/13/2023 12:24 ldm EPA 300.0 01/14/2023 00:42 ldm Chloride 7 1 mg/L 5002 1 lb 01/13/2023 12:24 ldm EPA 300.0 01/14/2023 00:42 ldm Nitrate as NO3 6.0 0.4 mg/L 45 1 1 01/13/2023 12:24 ldm EPA 300.0 01/14/2023 00:42 ldm Nitrite as N ND 0.1 mg/L 1 1 U 01/13/2023 12:24 ldm EPA 300.0 01/14/2023 00:42 ldm Nitrate+Nitrite as N 1.4 0.1 mg/L 10 1 1 01/13/2023 12:24 ldm EPA 300.0 01/14/2023 00:42 ldm Fluoride 0.2 0.1 mg/L 2 1 b 01/13/2023 12:24 ldm EPA 300.0 01/14/2023 00:42 ldm Total Anions 1.7 --- meq/L 1 lb 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 19:59 sta pH 7.19 --- units 1 01/12/2023 10:25 fgr 01/12/2023 10:25 fgr Specific Conductance 169 1 umhos/cm 16002 1 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 19:59 sta Total Dissolved Solids 180 20 mg/L 10002 1 01/16/2023 11:01 ctl SM 2540 C 01/17/2023 12:58 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 01/13/2023 18:00 jba SM 5540 C 01/13/2023 18:03 jba Aggressiveness Index 10.5 1 1 01/12/2023 10:25 fgr 01/12/2023 10:25 fgr Langelier Index(20°C) -1.3 1 1 01/12/2023 10:25 fgr 01/12/2023 10:25 fgr Nitrate Nitrogen 1.4 0.1 mg/L 10 1 1 01/13/2023 12:24 ldm EPA 300.0 01/14/2023 00:42 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. b The Blank was positive for constituent but less than the PQL 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.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