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ENVIRONMENTAL'< Analytical Chemists December 9, 2022 Lab No. : STK2256435-003 Luhdorff& Scalmanini, Consulting Eng. Customer No.: 3012023 Attn:Jeanette Lovelis 500 First Street Sampled On : November 15, 2022 at 09:00 Woodland, CA 95695 Sampled By : Ryan Sanchez Received On : November 15, 2022 at 13:45 Description South Tracy #3 Matrix : Drinking Water Project Water Monitoring Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 276 2.5 mg/L 1 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Calcium 71 1 mg/L 1 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Magnesium 24 1 mg/L 1 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Potassium 2 1 mg/L 1 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Sodium 73 1 mg/L 1 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Total Cations 8.7 -- meq/L 1 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Boron 1.0 0.1 mg/L 1 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Copper ND 10 ug/L 10002 1 U 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Iron 30 30 ug/L 3002 1 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Manganese ND 10 ug/L 502 1 J 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Zinc ND 20 ug/L 1 J 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac Total Alkalinity(as CaCO3) 190 10 mg/L 1 11/17/2022 15:14 sta SM 4500-H+B 11/17/2022 18:53 sta Hydroxide as OH ND 10 mg/L 1 U 11/17/2022 15:14 sta SM 4500-H+B 11/17/2022 18:53 sta Carbonate as CO3 ND 10 mg/L 1 U 11/17/2022 15:14 sta SM 4500-H+B 11/17/2022 18:53 sta Bicarbonate as HCO3 230 10 mg/L 1 11/17/2022 15:14 sta SM 4500-H+B 11/17/2022 18:53 sta Sulfate 172 0.5 mg/L 5002 1 12/05/2022 11:53 ldm EPA 300.0 12/06/2022 04:03 ldm Chloride 53 1 mg/L 5002 1 12/05/2022 11:53 Idm EPA 300.0 12/06/2022 04:03 ldm Nitrate as NO3 17.4 0.4 mg/L 45 1 11/16/2022 13:00 Ifs SM 4500-NO3 F 11/16/2022 15:24 Ifs Nitrite as N ND 0.2 mg/L 1 1 U 11/16/2022 13:00 Ifs SM 4500-NO3 F 11/16/2022 15:22 Ifs Nitrate+Nitrite as N 3.9 0.4 mg/L 10 1 11/16/2022 13:00 Ifs SM 4500-NO3 F 11/16/2022 15:24 US Fluoride 0.2 0.1 mg/L 2 1 12/05/2022 11:53 Win EPA 300.0 12/06/2022 04:03 ldm Total Anions 9.1 --- meq/L 1 11/17/2022 15:14 sta SM 4500-H+B 11/17/2022 18:53 sta pH 7.85 -- units 1 T 11/17/2022 15:14 sta SM 4500-H+B 11/17/2022 18:53 sta Specific Conductance 848 1 umhos/cm 16001 1 11/17/2022 15:14 sta SM 4500-H+B 11/17/2022 18:53 sta Total Dissolved Solids 520 20 mg/L 10002 1 11/17/2022 09:35 ctl SM 2540 C 11/18/2022 11:29 cd Total Dissolved Solids(sum) 643 0 mg/L 1 11/18/2022 15:00 ac EPA 200.7 11/18/2022 19:24 ac MBAS(foaming agents) ND 0.1 mg/L 0.51 1 U 11/16/2022 15:14 jba SM 5540 C 11/16/2022 16:49 jba Aggressiveness Index 12.4 1 - 1 11/17/2022 15:14 sta SM 4500-H+B 11/17/2022 18:53 sta Langelier Index(20°C) 0.5 1 1 11/17/2022 15:14 sta SM 4500-H+B 11/17/2022 18:53 sta Nitrate Nitrogen 3.9 0.4 mg/L 10 1 11/16/2022 13:00 Ifs SM 4500-NO3 F 11/16/2022 15:24 Us DQF Flags Defmition: 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,Dil.=Dilution MCL=Maximum Contamination Level.2-Secondary Standard.3-CDPH Notification Level.AL=Regulatory Action Level. Section:Sample Results Page 7 of 17 Page 7 of 17 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