Laserfiche WebLink
y <br /> SAN JOAQUIN COUNTY ENVIRONMENTAL HEALTH DEPARTMENT <br /> SMALL PUBLIC WATER SYSTEM <br /> POSITIVE TOTAL COLIFORM INVESTIGATION <br /> AUTHORITY; CALIFORNIA CODE OF REGULATIONS, TITLE 22, SECTION 64426(B) <br /> This form is intended to assist Small Public Water Systems with completion of a Positive Total Coliform(TC) Investigation for exceeding the <br /> Total Coliform Rule (TCR) Maximum Contaminant Levels (MCL) <br /> PWSID NUMBER: NAME PHONE NUMBER E-MAIL ADDRESS <br /> WATER SYSTEM C41 M QAO-V— -2-11"' , L .3� j Ty+f <br /> Certified Operator CDO/CTO : Ob,�c�u.lnc�,,,, l� ZDS - 5 9- 77 <br /> Property Owner: <br /> Certified Laboratory i=, u•" 1 ,,.^- ru,- Y� e R E e <br /> SAMPLE SITES SAMPLE DATE RESULTS r oR: List the Last 12 Months that had a TCR MCL <br /> TC MPN E. COLI MPN CHLORINE PPM <br /> Well ID ' i o i s' ew j Violation <br /> Well I D <br /> Pressure Tank — 1• 7. <br /> ROUTINE f', c ._�'6 4p kil 2. i3. <br /> REPEAT1 - ,2Q . i'�� �.:C� ��.. .��CF, /.� 3. 9. <br /> fol/C'.ti .V CvrC 4 10. <br /> REPEAT 2 -_ �- i- cr�y� S <br /> REPEAT 3 <br /> 5 11. <br /> t.��,4 <br /> REPEAT4 av Ci.vQifu '`,k. 6 12. <br /> OTHER G` <br /> OTHER <br /> OTHER <br /> INVESTIGATION: <br /> Review the results above. If the well is positive, then determine if the well is contaminating the system, or is the system contaminating the well. <br /> To determine this inspect the wellhead for a functioning check valve. Is it present? Y/N, Is it functioning to prevent system water from draining back into <br /> the well?-- j _Y/N. To verify this, open the sample tap installed on the well side of the check valve, when the well is off. If water runs out of the tap, then the <br /> check valve is not functioning/sealing properly. Water will not run out of the tap when the well pump is off, if the check valve is functioning. <br /> If the valve leaks water back into the well, then the source of the contamination may originate down stream of the well. If the check valve is holding, then most <br /> likely the well is the source of the contamination. <br /> If THE WELL IS CONTAMINATING THE SYSTEM <br /> Perform a physical inspection as itemized in the SOURCE section. Determine if the contamination was caused by a structural deficiency at the surface of the well <br /> head or the construction/deterioration of the well. <br /> Interview the operator to determine if maintenance to the well or pump took place since the last absent TC results. (were well components replaced or repaired, <br /> wellhead seal broken, chlorination or sounding of the well was done, etc) <br /> 5 i AF F c_�-,�.,�ny <br /> SC's V..0 -C-r 0-P V4-u_ rJC,C_+C_ai of <br />