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ENVIRONMENTAI Analytical Chemists December 22, 2020 Lab ID : STK2056526-003 Customer ID : 3-12023 Luhdorff& Scalmanini, Consulting Eng. Attn: Jeanette Lovelis Sampled On : November 24, 2020-10:15 500 First Street Sampled By : Will Zimmerman Woodland, CA 95695 Received On : November 24, 2020-14:40 Matrix : Drinking Water Description : South Tracy#3 Project : Water Monitoring 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 248 2.5 mg/L 200.7 11/25/20:213996 200.7 11/25/20:219019 Calcium 63 1 mg/L 200.7 11/25/20:213996 200.7 11/25/20:219019 Magnesium 22 1 mg/L 200.7 11/25/20:213996 200.7 11/25/20:219019 Potassium 2 1 mg/L 200.7 11/25/20:213996 200.7 11/25/20:219019 Sodium 65 1 mg/L 200.7 11/25/20:213996 200.7 11/25/20:219019 Total Cations 7.8 --- meq/L 200.7 11/25/20:213996 200.7 11/25/20:219019 Boron 0.9 0.1 mg/L 200.7 11/25/20:213996 200.7 11/25/20:219019 Copper ND 10 ug/L 10002 200.7 11/25/20:213996 200.7 11/25/20:219019 Iron ND 30 ug/L 3002 200.7 11/25/20:213996 200.7 11/25/20:219019 Manganese ND 10 ug/L 502 200.7 11/25/20:213996 200.7 11/25/20:219019 Zinc ND 20 ug/L 200.7 11/25/20:213996 200.7 [1/25/20:219019 Total Alkalinity(as 180 10 mg/L 2320B 12/05/20:214246 2320B 12/06/20:219438 CaCO3) Hydroxide as OH ND 10 mg/L 2320E 12/05/20:214246 2320B 12/06/20:219438 Carbonate as CO3 ND 10 mg/L 2320E 12/05/20:214246 2320B 12/06/20:219438 Bicarbonate as HCO3 220 10 mg/L 2320E 12/05/20:214246 2320E 12/06/20:219438 Sulfate 154 0.5 mg/L 5002 300.0 11/25/20:214055 300.0 11/25/20:219093 Chloride 53 1 mg/L 5002 300.0 11/25/20:214055 300.0 11/25/20:219093 Nitrate as NO3 22.3 0.4 mg/L 45 300.0 11/25/20:214055 300.0 11/25/20:219093 itrite as N ND 0.2 mg/L 1 300.0 11/25/20:214055 300.0 11/25/20:219093 Nitrate+Nitrite as N 5.0 0.1 mg/L 10 300.0 11/25/20:214055 300.0 11/25/20:219093 Fluoride 0.2 0.1 mg/L 2 300.0 11/25/20:214055 300.0 11/25/20:219093 Total Anions 8.7 --- meq/L 2320B 12/05/20:214246 2320B 12/06/20:219438 pH(Field) 8.5 -- units 4500-H B 11/24/20:214414 4500HB 11/24/20:219936 Specific Conductance 875 1 umhos/cm 16002 2510B 12/07/20:214325 2510B 12/07/20:219457 Total Dissolved Solids 530 20 mg/L 10002 2540CE 11/30/20:214057 25400 12/01/20:219183 Total Dissolved Solids 602 0 mg/L 200.7 11/25/20:213996 200.7 11/25/20:219019 (sum) MBAS Screen Negative 0.1 mg/L 0.52 5540C 11/25/20:214067 55400 11/25/20:219118 Aggressiveness Index 13.0 1 -- 4500-H B 11/24/20:214414 4500HB 11/24/20:219936 Langelier Index(20°C) 1.1 1 -- 4500-H B 11/24/20:214414 4500HB 11/24/20:219936 Nitrate Nitrogen 1 5.0 1 0.1 1 mg/L 1 10 1 3000 i 1/25/20:214055 1 300.0 11/25/20:219093 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 5 of I I Corporate Offices&Laboratory Office iL 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.2'