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TABLE 3 - DETECTION OF CO-NTAMINANTS WITH A PRIMARY DRINKING WATER STANDARD Chemical or Constituent Sample Level Rang of 'NCL PHG (and reporting units) Date Detected Detections IMRDLJ (1vtCLG) Topical Source of Contaminant _ [MRDLG_ j _ Nitrate as Nitrogen(pptln) 118,'13'18 1 5 10 W Runoff and leachine from fertilizer use, (caching from septic tanks and sewage, erosion of natural deposits Arsenic i pph, 2018 22- 212-23_. I 1-1,004- l Erosion`of narurai deposits- runofffrom-- orchards: Mass and elec;romes production wastes ---i 2 — - — * — Discharge trom industrial an a`grlcu wr"aii._.3-Trichlorupropture X018 U.06 U.04-O.U7 0.005 U.Of107 [TCPa(}igrL) I chemical factories. leaching from hazardous waste sites. used as cieaning and ;maintenance soken;. paint and vanish ;remover.and cleaning and degreasing a:ent:byproduct during the pt`oduction of u ler compounds and pesticides. `Am violasion of an MCL or A1 is esierisked Additiaial irtformaiir n reoar&ing the violation is provided below. Additional General information on Drinking Water Drinking water. including bottled water,may reasonably he expected to contain at iensi small amotints of some.onry-ninanr_s. T he presence of contarninwiLs does not nec:essarih,indicate that the water poses a health risk. More information, about zontarniriant;and potential health effects can be obtained by calling the USEPA's Safe Drinking Water Hotline(1-SO0-42a-4?9l i. Some people may be more vulnerable to contaminants ir.,drinking watcr thar,the general population Immuno-compromised per:;ons sztici, as pemons with cancer undergoing chemotherapy. persons who have undertone organ transplants.peoplc with HIViAIDS or other immune system disorders. some elderly.and infants can be particularh at risk; from infections. These people should seek aavice abort: dnnking water from their health carr providers t_?SEPA%Centers for Disease Control(CDC;pttdeiines on appropriate means to lessen the risk of infection bs Lnniosporulium and oche-microbial contaminants arc available from the Sale E)rirking Water I iotline. Summar)- Information for Contaminants Exceeding an NICL or AL, lir a Violation of anN Treatment or Monitoring and Reporting Requirements In 20 i 8_a-sen is at the source well exceeded the maximun,allowable limit(MCL). .Arsenic is _- mineral krrow-n to cause cancer in humans at high conccntrations and is iinked to other health effects such as skin damage and other circulatory problems. Some people who drink water containing arsenic m excess of the MCL over man) years could experience skin damage or prohlems with their circulmon,system. and ma-, navr an increased risk of getting cancer. In 2018. 1.2=-Trichloropropane(i_23-TCP)was deteaed at the well above the O,005 ug!L ma:ximurr.contaminant(allowable) limit Some people who drink water containing 11,3-TCP in excess of the MCL over many years may have an increased risk of getting cancer. In resp_once,safe drinking water is beins provided to the school. ustn£oulk storage tanks to deliver the drinking.water. Addtrcmal testing at the well is also required by the State to monitor the contaminants at the well. Vulnerability Assessment Summary A source water assessment was conducted for Well 902 of the Manteca USD-Nile Carden School water cyStem. to October of 2'(X)2_ The source is considered most vulnerable to the following actin hies no! associated with any detected contaminants: wells-water sunoly For more mtormation regarding the assessment summary.:ontact Aaron Bowers ai Mante-ca Unified School District 2018 SR'S CCR Form Revvied Feb 201 t'