Water System Details

County: Fresno
Sys. Category: Complete water system only
Ownership: Private
Ownership Type: Private non-PUC reg
Population: 100
Connections: 22
2010 MHI: 57,784
DAC Classification Source: Calculated

Geography: Foothills
Location: Coalinga

Contact Title:
Alt. Contact:

H2O Sys. Num.: 1000213
Water Source: Assumed GW
Active Wells Count: -1
Wells Issues?: XXXXX
Issues: SWTR Violation - The DPH inspection report dated December 2007 listed deficiencies for the treatment plant. The 100 gallon per minute treatment plant is approximately 30 years old and includes a pretreatment unit, 2 each 42 inch diameter pressure filters

Potential Solutions:

  Water quality sample results for selected constituents. Values shown for water samples collected 2004-2014.
  Raw Water Delivered Water   Raw Water Delivered Water
  Max. Ave. Count Max. Ave. Count   Max. Ave. Count Max. Ave. Count
Arsenic (10 ug/L): 2.00 1.33 3 2.00 1.33 3 Flouride (2 mg/L): 0.18 0.10 3 0.18 0.10 3
DBCP (0.2 ug/L): Perchlorate (6 ug/L): 0.00 0.00 3 0.00 0.00 3
Nitrate as NO3 (45 mg/L): 4.10 3.40 3 4.10 3.40 3 TCE (5 ug/L):
PCB (0.5ug/L): THMs (80 ug/L): 100.00 81.00 100.00 81.00
Uranium (20 pC/L):              

WW Sys. Num.:
Treatment: XXXXX
Design Flow (MGD):

Total Enforcement Actns:
Cat.1 Viol:
Cat. 2 Viol:

Total Viol:

Septic Probs?: XXXXX
Sewer Issues:
Potential Solutions: New equipment items including the following are proposed for the treatment plant: A new pressure contact clarifier pretreatment unit, an additional 42 inch diameter pressure filter, a new 100,000 gallon capacity treated water storage tank, a granular activated carbon (GAC) filter system, an ultraviolet light reactor to disinfect filtered water, two (one duty, one standby) new distribution system booster pumps controlled by variable frequency drives to maintain system pressure, and new filtered water and backwash water totalizing rate of flow meters. The existing hydropneumatic tank and the two storage tanks would be demolished.The contact clarifier will improve the filtered water quality, and the GAC filter system will reduce organics and TTHM precursors. GAC treatment, along with UV disinfection to allow a reduction in the chlorine dose will resolve the TTHM problem, and the TOC removal ratio problem. - A new 100,000 gallon storage tank is proposed, which will satisfy Title 17 Code of Regulations Section 64554. The inlet and outlet connections will be configured to achieve a minimum short circuiting factor of 0.15. The tank will be equipped with a level transmitter with an analog output, and will be connected to a new programmable logic controller (PLC). A new water temperature transmitter, a new pH transmitter, and a new flowmeter on the storage tank outlet pipe will also be connected to the PLC, which will be used to calculate the CT that is achieved on a continuous basis. The CT ratio will also be calculated and displayed continuously, and an adjustable alarm output will be provided to send an alarm or shut down the plant if the CT ratio drops below the setpoint.Using the actual tank level and rate of outflow, water temperature and pH will result in more accurate CT achieved values, compared to the CT's that result from using default values for tank level, temperature and pH. This will allow the use of lower chlorine levels, which in turn will result in lower disinfection byproduct formation. The rate of flow used in the existing CT calculations is the total flow out of the hydropneumatic tank into the system, which can be significantly higher than the rate of flow out of the storage tanks for short periods of time.
Treatment Comm: XXXXX
SelfHelp Comments: