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.O "AGRICULTURAL Analytical Chemists February 23, 2023 Lab No. : STK2331696-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Description :Wellhead Matrix : Drinking Water Project :5161 W. 11th Street, Tracy, CA 95304 Sampled On : February 7, 2023 at 11:25 (WP0043835) Drinking Water Interpretations Summary: Your water was acceptable for all items tested on this sample report. Details are presented below: ---7-Result Compared to MCL Constituent Resuli Units -UL Inorganic -Primary Less Than or Equal Exceeded Fluoride ND mg/L 2 PASS Nitrate + Nitrite as N ND mg/L 10 PASS Nitrate as NO3 ND mg/L 45 PASS I Nitrate Nitrogen ND mg/L 10 PASS Nitrite as N ND mg/L 1 PASS Inorganic - Secondary Less Than or Equal Exceeded Chloride 85 mg/L 500 PASS Copper 20 ug/L 1000 PASS Iron ND ug/L 300 PASS MBAS (foaming agents) Negative mg/L 0.5 PASS Specific Conductance 953 umhos/cm 1600 PASS Sulfate 190 mg/L 500 PASS Total Dissolved Solids 630 1 mg/L 1000 PASS Other Less Than or Equal Exceeded Copper 20 ug/L 1300** PASS ND=Non-Detect; **California Title 22, Section 64672.3 Definitions MCL The maximum level at which a constituent may be present and be considered acceptable for potability or aesthetics. Primary Items listed as primary are regulated because of health concerns. If there is a failure for a primary constituent treatment is normally required. Secondary Items listed as secondary are regulated because they may adversely affect the taste, odor or appearance of drinking water.They are not directly health related. If there is a failure for a secondary constituent on a small public water system it is best to consult your regulator to determine if treatment is required.A secondary constituent failure for a private water system does not require treatment. However,the owner may wish to treat the water in order to improve the quality. Treatment If your water requires treatment we suggest that you contact a qualified water treatment company.They are normally listed under the following searches: Water Purification&Filtration Equipment Water Softening&Conditioning Equipment Water Treatment Equipment Section:Drinking Water Interpretations Page 4 of 7 Page 4 of 7 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