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FGL ENVIRONMENTAL • , Analytical Chemists March 23, 2021 Lab ID : STK2133009-001 Customer ID : 3-17919 San Joaquin Co.Environmental Health Dep Water Quality Division Sampled On : March 3, 2021-10:50 Attn: Michael Kith Sampled By : Francisco Garcia Rui 1868 East Hazelton Ave. Received On : March 3, 2021-12:50 Stockton, CA 95205 Matrix : Drinking Water Description : Wellhead Project : 145 Homestead Rd.,Tracy Sample Result - Inorganic Constituent Result PQL Units MCL./AL Sample Preparation Sample Analysis Method Date/ID Method Date/ID General Mineral Total Hardness as CaCO3 602 2.5 mg/L 200.7 03/05/21:202423 200.7 03/05/21:203373 Calcium 144 1 mg/L 200.7 03/05/21:202423 200.7 03/05/21:20337; Magnesium 59 1 mg/L 200.7 03/05/21:202423 200.7 03/05/21:203373 Potassium 3 1 mg/L 200.7 03/05/21:202423 200.7 03/05/21:203373 odium 316 1 mg/L 200.7 03/05/21:202423 200.7 03/05/21:203373 Total Cations 25.9 --- meq/I. 200.7 03/05/21:202423 200.7 03/05/21:203373 Boron 1.5 0.1 mg/L 200.7 03/05/21:202423 200.7 03/05/21:203373 Copper ND 10 ug/L 10002 200.7 03/05/21:202423 200.7 03/05/21:203373 Ori 60 30 ug/L 3002 200.7 03/05/21:202423 200.7 03/05/21:203373 anganese 170 10 ug/L 502 200.7 03/05/21:202423 200.7 03/05/21:203373 Zinc ND 20 ug/L 200.7 03/05/21:202423 200.7 03/05/21:203373 AR 5.6 0.1 200.7 03/05/21:202423 200.7 03/05/21:203373 Total Alkalinity(as 220 10 mg/L 2320E 03/10/21:202661 23208 03/11/21:203753 aCO3) ydroxide as OH ND 10 mg/L 2320B 03/10/21:202661 2320E 03/11/21:203753 Carbonate as CO3 ND 10 mg/L 2320B 03/10/21:202661 2320E 03/11/21:203753 /carbonate as HCO3 270 10 mg/L 2320B 03/10/21:202661 2320B 03/11/21:203753 Sulfate 385 5* mg/L 5002 300.0 03/04/21:202410 300.0 03/04/21:203298 Chloride 580 10* mg/L 5002 300.0 03/04/21:202410 300.0 03/04/21:203298 itrate as NO3 3.8 0.4 mg/L 45 300.0 03/04/21:202410 300.0 03/04/21:203298 /trite as N ND 0.2 mg/L 1 300.0 03/04/21:202410 300.0 03/04!21:203298 Nitrate+Nitrite as N 0.8 0.1 mg/L 10 300.0 03/04/21:202410 300.0 03/04/21:203298 Fluoride ND 0.1 mg/L 2 300.0 03/04/21:202410 300.0 03/04/21:203298 Total Anions 28.9 --- meq/L 2320E 03/10/21:202661 2320E 03/11/21:203753 H(Field) 8.1 -- units 4500-H B 03/03/21:202577 4500HB 03/03/21:203492 Specific Conductance 2860 1 umhos/cm 16002 2510E 03/11/21:202671 2510B 03/11/21:203609 Total Dissolved Solids 1770 20 mg/L 10002 2540CE 03/05/21:202436 2540C 03/08/21:203384 AS Extraction ND 0.1 mg/L 0.52 5540C 03/04/21:202526 5540C 03/04/21:203395 Aggressiveness Index 13.0 1 -- 4500-H B 03/03/21:202577 4500HB 03/03/21:203492 angelier Index(20°C) 1.1 1 -- 4500-H B 03/03/21:202577 4500HB 03/03/21:203492 itrate Nitrogen 0.8 0.1 mg/L 10 300.0 03/04/21:202410 300.0 03/04/21:203298 ND=Non-Detected.PQL--Practical Quantitation Limit.*PQL adjusted for dilution. MCL=Maximum Contamination Level.2-Secondary Standard.3-CDPH Notification Level.AL=Regulatory Action Level. Page 3 of 9 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