Appendix E. Phase I - 8.3.11 — Cotati City Council, August 27, 2024 (part 2 of 2)

Chemical: TURBIDITY, LABORATORY
Sample Collected: 01/10/2011 Findings: 0.36 NTU
Chemical: NITRATE (AS NO3)
Sample Collected: 01/10/2011 Findings: 4.8 MG/L
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 01/10/2011 Findings: 270. MG/L
Chemical: MANGANESE
Sample Collected: 01/10/2011 Findings: 160. UG/L
Chemical: BARIUM
Sample Collected: 01/10/2011 Findings: 210. UG/L
Chemical: ARSENIC
Sample Collected: 01/10/2011 Findings: 2.6 UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 01/10/2011 Findings: 0.21 MG/L
Chemical: CHLORIDE
Sample Collected: 01/10/2011 Findings: 57. MG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-24
Chemical: SODIUM
Sample Collected: 09/25/2007 Findings: 21. MG/L
Chemical: MAGNESIUM
Sample Collected: 09/25/2007 Findings: 25. MG/L
Chemical: CALCIUM
Sample Collected: 09/25/2007 Findings: 42. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 09/25/2007 Findings: 210. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 09/25/2007 Findings: 270. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 09/25/2007 Findings: 220. MG/L
Chemical: PH, LABORATORY
Sample Collected: 09/25/2007 Findings: 7.7
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 09/25/2007 Findings: 500. US
Chemical: NITRATE (AS NO3)
Sample Collected: 09/19/2006 Findings: 2.5 MG/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 06/27/2006 Findings: 0.61 PCI/L
Area Served: ROHNERT PARK
Pop Served: 38511 Connections: 8067
ROHNERT PARK, CA 94928
600 ENTERPRISE DRIVE
Organization That Operates System:

System Name: Rohnert Park, City of
System Number: 4910014
Source Name: WELL 07
Source Lat/Long: 382035.9 1224245.5 Precision: 100 Feet (one Second) Water Type: Well/Groundwater Well Status: Active Raw
District Number: 03 Station Type: WELL/AMBNT/MUN/INTAKE FRDS Number: 4910014006 County: Sonoma
Prime Station Code: 06N/08W-26C01 M User ID: RXR
Water System Information:
14 NNE
1/2 - 1 Mile
Lower
CA WELLS 6652
Date: 07/11/1994
Average Water Depth: Not Reported
Deep Water Depth: Not Reported
Shallow Water Depth: Not Reported
Groundwater Flow: Varies
13 Site ID: Not Reported
West
1/2 - 1 Mile
Higher
AQUIFLOW 70347
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-25
Chemical: COPPER
Sample Collected: 07/27/2010 Findings: 132. UG/L
Chemical: BARIUM
Sample Collected: 07/27/2010 Findings: 110. UG/L
Chemical: ARSENIC
Sample Collected: 07/27/2010 Findings: 6.1 UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 07/27/2010 Findings: 0.19 MG/L
Chemical: CHLORIDE
Sample Collected: 07/27/2010 Findings: 17. MG/L
Chemical: POTASSIUM
Sample Collected: 07/27/2010 Findings: 2.5 MG/L
Chemical: SODIUM
Sample Collected: 07/27/2010 Findings: 21. MG/L
Chemical: MAGNESIUM
Sample Collected: 07/27/2010 Findings: 26. MG/L
Chemical: CALCIUM
Sample Collected: 07/27/2010 Findings: 45. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 07/27/2010 Findings: 220. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 07/27/2010 Findings: 283. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 07/27/2010 Findings: 232. MG/L
Chemical: PH, LABORATORY
Sample Collected: 07/27/2010 Findings: 7.4
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 07/27/2010 Findings: 510. US
Chemical: AGGRSSIVE INDEX (CORROSIVITY)
Sample Collected: 09/25/2007 Findings: 12.1
Chemical: TURBIDITY, LABORATORY
Sample Collected: 09/25/2007 Findings: 6.e-002 NTU
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 09/25/2007 Findings: 340. MG/L
Chemical: LEAD
Sample Collected: 09/25/2007 Findings: 9.7 UG/L
Chemical: BARIUM
Sample Collected: 09/25/2007 Findings: 110. UG/L
Chemical: ARSENIC
Sample Collected: 09/25/2007 Findings: 5.9 UG/L
Chemical: CHLORIDE
Sample Collected: 09/25/2007 Findings: 15. MG/L
Chemical: POTASSIUM
Sample Collected: 09/25/2007 Findings: 2.6 MG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-26
Peak flow data begin date: 0000-00-00 Peak flow data end date: 0000-00-00 Daily flow data end date: 0000-00-00 Daily flow data count: 0 Real time data flag: 0 Daily flow data begin date: 0000-00-00 Project number: CA-9-358M
Source of depth data: Not Reported
Well depth: 462 Hole depth: 462
Aquifer: Not Reported
Aquifer Type: Not Reported
Type of ground water site: Single well, other than collector or Ranney type Local standard time flag: Y
Date inventoried: Not Reported Mean greenwich time offset: PST Site type: Ground-water other than Spring Date construction: 19600604 Topographic: Valley flat
Hydrologic: Russian. California. Area = 1470 sq.mi.

Altitude datum: National Geodetic Vertical Datum of 1929 Altitude accuracy: 10
Altitude method: Interpolated from topographic map
Altitude: 97
Location map: COTATI Map scale: 24000
Country: US Land net: SENWNES 26T 06NR 08WM
State: 06 County: 097
Dec latlong datum: NAD83 District: 06
Coor accr: F Latlong datum: NAD27
Dec lon: -122.70859862 Coor meth: M
Longitude: 1224227 Dec lat: 38.34102564
Latitude: 382028 EDR Site id: USGS3236673
Site name: 006N008W26A001M
Agency cd: USGS Site no: 382028122422701
D17
NE
1/2 - 1 Mile
Higher
FED USGS USGS3236673
Date: 04/25/1997
Average Water Depth: Not Reported
Deep Water Depth: Not Reported
Shallow Water Depth: Not Reported
Groundwater Flow: NW
C16 Site ID: Not Reported
ENE
1/2 - 1 Mile
Higher
AQUIFLOW 70245
Date: 04/25/1997
Average Water Depth: Not Reported
Deep Water Depth: Not Reported
Shallow Water Depth: Not Reported
Groundwater Flow: NW
C15 Site ID: Not Reported
ENE
1/2 - 1 Mile
Higher
AQUIFLOW 70246
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 08/17/2010 Findings: 360. MG/L
Chemical: AGGRSSIVE INDEX (CORROSIVITY)
Sample Collected: 07/27/2010 Findings: 11.8
Chemical: TURBIDITY, LABORATORY
Sample Collected: 07/27/2010 Findings: 0.78 NTU
Chemical: ZINC
Sample Collected: 07/27/2010 Findings: 182. UG/L
Chemical: LEAD
Sample Collected: 07/27/2010 Findings: 25.5 UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-27
Chemical: CHLORIDE
Sample Collected: 09/12/2006 Findings: 17. MG/L
Chemical: POTASSIUM
Sample Collected: 09/12/2006 Findings: 2.6 MG/L
Chemical: SODIUM
Sample Collected: 09/12/2006 Findings: 22. MG/L
Chemical: MAGNESIUM
Sample Collected: 09/12/2006 Findings: 28. MG/L
Chemical: CALCIUM
Sample Collected: 09/12/2006 Findings: 49. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 09/12/2006 Findings: 240. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 09/12/2006 Findings: 280. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 09/12/2006 Findings: 230. MG/L
Chemical: PH, LABORATORY
Sample Collected: 09/12/2006 Findings: 7.7
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 09/12/2006 Findings: 530. US
Chemical: COLOR
Sample Collected: 09/12/2006 Findings: 4. UNITS
Area Served: ROHNERT PARK
Pop Served: 38511 Connections: 8067
ROHNERT PARK, CA 94928
600 ENTERPRISE DRIVE
Organization That Operates System:

System Name: Rohnert Park, City of
System Number: 4910014
Source Name: WELL 02
Source Lat/Long: 382026.0 1224223.5 Precision: 1,000 Feet (10 Seconds) Water Type: Well/Groundwater Well Status: Active Raw
District Number: 03 Station Type: WELL/AMBNT/MUN/INTAKE FRDS Number: 4910014002 County: Sonoma
Prime Station Code: 06N/08W-26B01 M User ID: RXR
Water System Information:

D18
NE
1/2 - 1 Mile
Higher
CA WELLS 6651
Ground-water levels, Number of Measurements: 0
Ground water data count: 0
Ground water data begin date: 0000-00-00 Ground water data end date: 0000-00-00 Water quality data end date:0000-00-00 Water quality data count: 0 Peak flow data count: 0 Water quality data begin date: 0000-00-00 GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-28
Chemical: ARSENIC
Sample Collected: 07/21/2009 Findings: 5.9 UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 07/21/2009 Findings: 0.11 MG/L
Chemical: CHLORIDE
Sample Collected: 07/21/2009 Findings: 9.9 MG/L
Chemical: POTASSIUM
Sample Collected: 07/21/2009 Findings: 1.8 MG/L
Chemical: SODIUM
Sample Collected: 07/21/2009 Findings: 24. MG/L
Chemical: MAGNESIUM
Sample Collected: 07/21/2009 Findings: 12. MG/L
Chemical: CALCIUM
Sample Collected: 07/21/2009 Findings: 16. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 07/21/2009 Findings: 88. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 07/21/2009 Findings: 170. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 07/21/2009 Findings: 140. MG/L
Chemical: PH, LABORATORY
Sample Collected: 07/21/2009 Findings: 7.3
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 07/21/2009 Findings: 280. US
Chemical: NITRATE (AS NO3)
Sample Collected: 07/09/2008 Findings: 2.2 MG/L
Chemical: NITRATE (AS NO3)
Sample Collected: 09/18/2007 Findings: 2.5 MG/L
Chemical: AGGRSSIVE INDEX (CORROSIVITY)
Sample Collected: 09/12/2006 Findings: 12.2
Chemical: TURBIDITY, LABORATORY
Sample Collected: 09/12/2006 Findings: 4.5 NTU
Chemical: NITRATE (AS NO3)
Sample Collected: 09/12/2006 Findings: 10. MG/L
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 09/12/2006 Findings: 360. MG/L
Chemical: IRON
Sample Collected: 09/12/2006 Findings: 120. UG/L
Chemical: BARIUM
Sample Collected: 09/12/2006 Findings: 150. UG/L
Chemical: ARSENIC
Sample Collected: 09/12/2006 Findings: 4.3 UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 09/12/2006 Findings: 0.13 MG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-29
Chemical: MANGANESE
Sample Collected: 08/05/2010 Findings: 57. UG/L
Chemical: IRON
Sample Collected: 08/05/2010 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 07/06/2010 Findings: 95. UG/L
Chemical: IRON
Sample Collected: 07/06/2010 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 06/03/2010 Findings: 90. UG/L
Chemical: IRON
Sample Collected: 06/03/2010 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 05/06/2010 Findings: 63. UG/L
Chemical: IRON
Sample Collected: 05/06/2010 Findings: 1000. UG/L
Chemical: TURBIDITY, LABORATORY
Sample Collected: 04/28/2010 Findings: 1.4 NTU
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 04/28/2010 Findings: 230. MG/L
Area Served: COTATI
Pop Served: 6715 Connections: 2057
COTATI, CA 94931
P O BOX 428
Organization That Operates System:

System Name: Cotati, City of
System Number: 4910016
Source Name: WELL 01A
Source Lat/Long: 381940.5 1224222.1 Precision: 1,000 Feet (10 Seconds) Water Type: Well/Groundwater Well Status: Active Raw
District Number: 03 Station Type: WELL/AMBNT/MUN/INTAKE FRDS Number: 4910016004 County: Sonoma
Prime Station Code: 4910016-004 User ID: RXR
Water System Information:

E19
SE
1/2 - 1 Mile
Higher
CA WELLS 20754
Chemical: NITRATE (AS NO3)
Sample Collected: 07/20/2010 Findings: 2.5 MG/L
Chemical: AGGRSSIVE INDEX (CORROSIVITY)
Sample Collected: 07/21/2009 Findings: 11.

Chemical: NITRATE (AS NO3)
Sample Collected: 07/21/2009 Findings: 2.1 MG/L
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 07/21/2009 Findings: 210. MG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-30
Chemical: MANGANESE
Sample Collected: 02/17/2006 Findings: 50. UG/L
Chemical: IRON
Sample Collected: 02/17/2006 Findings: 480. UG/L
Chemical: MANGANESE
Sample Collected: 02/09/2006 Findings: 45. UG/L
Chemical: IRON
Sample Collected: 02/09/2006 Findings: 450. UG/L
Chemical: MANGANESE
Sample Collected: 02/03/2006 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 02/03/2006 Findings: 400. UG/L
Chemical: MANGANESE
Sample Collected: 01/26/2006 Findings: 81. UG/L
Chemical: IRON
Sample Collected: 01/26/2006 Findings: 3100. UG/L
Chemical: MANGANESE
Sample Collected: 01/20/2006 Findings: 49. UG/L
Chemical: IRON
Sample Collected: 01/20/2006 Findings: 620. UG/L
Chemical: MANGANESE
Sample Collected: 01/12/2006 Findings: 53. UG/L
Chemical: IRON
Sample Collected: 01/12/2006 Findings: 560. UG/L
Chemical: MANGANESE
Sample Collected: 01/06/2006 Findings: 52. UG/L
Chemical: IRON
Sample Collected: 01/06/2006 Findings: 720. UG/L
Chemical: MANGANESE
Sample Collected: 04/04/2011 Findings: 74. UG/L
Chemical: IRON
Sample Collected: 04/04/2011 Findings: 1100. UG/L
Chemical: GROSS ALPHA MDA95
Sample Collected: 03/07/2011 Findings: 1.69 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 03/07/2011 Findings: 1.11 PCI/L
Chemical: MANGANESE
Sample Collected: 03/07/2011 Findings: 69. UG/L
Chemical: IRON
Sample Collected: 03/07/2011 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 09/13/2010 Findings: 60. UG/L
Chemical: IRON
Sample Collected: 09/13/2010 Findings: 930. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-31
Chemical: MANGANESE
Sample Collected: 06/09/2006 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 06/09/2006 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 05/26/2006 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 05/26/2006 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 05/18/2006 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 05/18/2006 Findings: 1500. UG/L
Chemical: MANGANESE
Sample Collected: 05/12/2006 Findings: 65. UG/L
Chemical: IRON
Sample Collected: 05/12/2006 Findings: 930. UG/L
Chemical: MANGANESE
Sample Collected: 04/06/2006 Findings: 38. UG/L
Chemical: IRON
Sample Collected: 04/06/2006 Findings: 400. UG/L
Chemical: MANGANESE
Sample Collected: 03/31/2006 Findings: 62. UG/L
Chemical: IRON
Sample Collected: 03/31/2006 Findings: 720. UG/L
Chemical: MANGANESE
Sample Collected: 03/23/2006 Findings: 44. UG/L
Chemical: IRON
Sample Collected: 03/23/2006 Findings: 400. UG/L
Chemical: MANGANESE
Sample Collected: 03/17/2006 Findings: 46. UG/L
Chemical: IRON
Sample Collected: 03/17/2006 Findings: 470. UG/L
Chemical: MANGANESE
Sample Collected: 03/09/2006 Findings: 49. UG/L
Chemical: IRON
Sample Collected: 03/09/2006 Findings: 520. UG/L
Chemical: MANGANESE
Sample Collected: 03/03/2006 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 03/03/2006 Findings: 930. UG/L
Chemical: MANGANESE
Sample Collected: 02/23/2006 Findings: 49. UG/L
Chemical: IRON
Sample Collected: 02/23/2006 Findings: 460. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-32
Chemical: IRON
Sample Collected: 11/30/2006 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 11/22/2006 Findings: 84. UG/L
Chemical: IRON
Sample Collected: 11/22/2006 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 11/16/2006 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 11/16/2006 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 11/09/2006 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 11/09/2006 Findings: 2300. UG/L
Chemical: MANGANESE
Sample Collected: 09/29/2006 Findings: 55. UG/L
Chemical: IRON
Sample Collected: 09/29/2006 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 09/21/2006 Findings: 56. UG/L
Chemical: IRON
Sample Collected: 09/21/2006 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 09/15/2006 Findings: 40. UG/L
Chemical: IRON
Sample Collected: 09/15/2006 Findings: 1100. UG/L
Chemical: IRON
Sample Collected: 09/01/2006 Findings: 870. UG/L
Chemical: MANGANESE
Sample Collected: 08/24/2006 Findings: 50. UG/L
Chemical: IRON
Sample Collected: 08/24/2006 Findings: 950. UG/L
Chemical: MANGANESE
Sample Collected: 08/10/2006 Findings: 49. UG/L
Chemical: IRON
Sample Collected: 08/10/2006 Findings: 990. UG/L
Chemical: IRON
Sample Collected: 07/21/2006 Findings: 850. UG/L
Chemical: IRON
Sample Collected: 06/29/2006 Findings: 5200. UG/L
Chemical: MANGANESE
Sample Collected: 06/15/2006 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 06/15/2006 Findings: 1400. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-33
Chemical: IRON
Sample Collected: 02/22/2007 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 02/16/2007 Findings: 85. UG/L
Chemical: IRON
Sample Collected: 02/16/2007 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 02/08/2007 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 02/08/2007 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 01/25/2007 Findings: 75. UG/L
Chemical: IRON
Sample Collected: 01/25/2007 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 01/19/2007 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 01/19/2007 Findings: 1400. UG/L
Chemical: MANGANESE
Sample Collected: 01/11/2007 Findings: 28. UG/L
Chemical: IRON
Sample Collected: 01/11/2007 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 01/05/2007 Findings: 42. UG/L
Chemical: IRON
Sample Collected: 01/05/2007 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 12/28/2006 Findings: 59. UG/L
Chemical: IRON
Sample Collected: 12/28/2006 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 12/21/2006 Findings: 42. UG/L
Chemical: IRON
Sample Collected: 12/21/2006 Findings: 1500. UG/L
Chemical: MANGANESE
Sample Collected: 12/14/2006 Findings: 44. UG/L
Chemical: IRON
Sample Collected: 12/14/2006 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 12/08/2006 Findings: 46. UG/L
Chemical: IRON
Sample Collected: 12/08/2006 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 11/30/2006 Findings: 79. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-34
Chemical: COLOR
Sample Collected: 05/17/2007 Findings: 10. UNITS
Chemical: MANGANESE
Sample Collected: 05/11/2007 Findings: 70. UG/L
Chemical: IRON
Sample Collected: 05/11/2007 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 05/03/2007 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 05/03/2007 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 04/27/2007 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 04/27/2007 Findings: 1500. UG/L
Chemical: MANGANESE
Sample Collected: 04/19/2007 Findings: 140. UG/L
Chemical: IRON
Sample Collected: 04/19/2007 Findings: 1400. UG/L
Chemical: IRON
Sample Collected: 04/13/2007 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 04/05/2007 Findings: 49. UG/L
Chemical: IRON
Sample Collected: 04/05/2007 Findings: 1500. UG/L
Chemical: MANGANESE
Sample Collected: 03/30/2007 Findings: 64. UG/L
Chemical: IRON
Sample Collected: 03/30/2007 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 03/22/2007 Findings: 54. UG/L
Chemical: IRON
Sample Collected: 03/22/2007 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 03/16/2007 Findings: 62. UG/L
Chemical: IRON
Sample Collected: 03/16/2007 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 03/08/2007 Findings: 68. UG/L
Chemical: IRON
Sample Collected: 03/08/2007 Findings: 1300. UG/L
Chemical: IRON
Sample Collected: 03/02/2007 Findings: 1400. UG/L
Chemical: MANGANESE
Sample Collected: 02/22/2007 Findings: 75. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-35
Chemical: MANGANESE
Sample Collected: 06/08/2007 Findings: 73. UG/L
Chemical: IRON
Sample Collected: 06/08/2007 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 05/31/2007 Findings: 70. UG/L
Chemical: IRON
Sample Collected: 05/31/2007 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 05/25/2007 Findings: 83. UG/L
Chemical: IRON
Sample Collected: 05/25/2007 Findings: 1500. UG/L
Chemical: RADIUM 228 MDA95
Sample Collected: 05/17/2007 Findings: 0.6 PCI/L
Chemical: RADIUM 228 COUNTING ERROR
Sample Collected: 05/17/2007 Findings: 0.684 PCI/L
Chemical: TURBIDITY, LABORATORY
Sample Collected: 05/17/2007 Findings: 0.96 NTU
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 05/17/2007 Findings: 230. MG/L
Chemical: IRON
Sample Collected: 05/17/2007 Findings: 1300. UG/L
Chemical: ARSENIC
Sample Collected: 05/17/2007 Findings: 2.9 UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 05/17/2007 Findings: 0.26 MG/L
Chemical: CHLORIDE
Sample Collected: 05/17/2007 Findings: 32. MG/L
Chemical: SODIUM
Sample Collected: 05/17/2007 Findings: 41. MG/L
Chemical: MAGNESIUM
Sample Collected: 05/17/2007 Findings: 8.2 MG/L
Chemical: CALCIUM
Sample Collected: 05/17/2007 Findings: 15. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 05/17/2007 Findings: 70. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 05/17/2007 Findings: 110. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 05/17/2007 Findings: 90. MG/L
Chemical: PH, LABORATORY
Sample Collected: 05/17/2007 Findings: 6.5
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 05/17/2007 Findings: 330. US
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-36
Chemical: MANGANESE
Sample Collected: 08/22/2007 Findings: 46. UG/L
Chemical: IRON
Sample Collected: 08/22/2007 Findings: 940. UG/L
Chemical: MANGANESE
Sample Collected: 08/16/2007 Findings: 53. UG/L
Chemical: IRON
Sample Collected: 08/16/2007 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 08/09/2007 Findings: 68. UG/L
Chemical: IRON
Sample Collected: 08/09/2007 Findings: 990. UG/L
Chemical: MANGANESE
Sample Collected: 08/03/2007 Findings: 67. UG/L
Chemical: IRON
Sample Collected: 08/03/2007 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 07/26/2007 Findings: 66. UG/L
Chemical: IRON
Sample Collected: 07/26/2007 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 07/20/2007 Findings: 69. UG/L
Chemical: IRON
Sample Collected: 07/20/2007 Findings: 1400. UG/L
Chemical: MANGANESE
Sample Collected: 07/12/2007 Findings: 71. UG/L
Chemical: IRON
Sample Collected: 07/12/2007 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 07/06/2007 Findings: 43. UG/L
Chemical: IRON
Sample Collected: 07/06/2007 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 06/28/2007 Findings: 61. UG/L
Chemical: IRON
Sample Collected: 06/28/2007 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 06/22/2007 Findings: 68. UG/L
Chemical: IRON
Sample Collected: 06/22/2007 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 06/14/2007 Findings: 73. UG/L
Chemical: IRON
Sample Collected: 06/14/2007 Findings: 1300. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-37
Chemical: IRON
Sample Collected: 11/21/2007 Findings: 1100. UG/L
Chemical: IRON
Sample Collected: 10/25/2007 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 10/18/2007 Findings: 45. UG/L
Chemical: IRON
Sample Collected: 10/18/2007 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 10/11/2007 Findings: 65. UG/L
Chemical: IRON
Sample Collected: 10/11/2007 Findings: 1400. UG/L
Chemical: MANGANESE
Sample Collected: 10/08/2007 Findings: 33. UG/L
Chemical: IRON
Sample Collected: 10/08/2007 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 10/04/2007 Findings: 68. UG/L
Chemical: IRON
Sample Collected: 10/04/2007 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 10/01/2007 Findings: 160. UG/L
Chemical: IRON
Sample Collected: 10/01/2007 Findings: 1100. UG/L
Chemical: IRON
Sample Collected: 09/27/2007 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 09/20/2007 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 09/20/2007 Findings: 1400. UG/L
Chemical: RADIUM 228 MDA95
Sample Collected: 09/20/2007 Findings: 0.55 PCI/L
Chemical: RADIUM 228 COUNTING ERROR
Sample Collected: 09/20/2007 Findings: 0.635 PCI/L
Chemical: IRON
Sample Collected: 09/13/2007 Findings: 640. UG/L
Chemical: MANGANESE
Sample Collected: 09/06/2007 Findings: 28. UG/L
Chemical: IRON
Sample Collected: 09/06/2007 Findings: 720. UG/L
Chemical: MANGANESE
Sample Collected: 08/30/2007 Findings: 48. UG/L
Chemical: IRON
Sample Collected: 08/30/2007 Findings: 900. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-38
Chemical: IRON
Sample Collected: 02/21/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 02/14/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 02/14/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 02/07/2008 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 02/07/2008 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 01/31/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 01/31/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 01/24/2008 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 01/24/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 01/17/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 01/17/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 01/10/2008 Findings: 140. UG/L
Chemical: IRON
Sample Collected: 01/10/2008 Findings: 1400. UG/L
Chemical: MANGANESE
Sample Collected: 01/07/2008 Findings: 140. UG/L
Chemical: IRON
Sample Collected: 01/07/2008 Findings: 1400. UG/L
Chemical: MANGANESE
Sample Collected: 12/27/2007 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 12/27/2007 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 12/20/2007 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 12/20/2007 Findings: 1300. UG/L
Chemical: IRON
Sample Collected: 12/13/2007 Findings: 1300. UG/L
Chemical: IRON
Sample Collected: 12/06/2007 Findings: 1200. UG/L
Chemical: IRON
Sample Collected: 11/29/2007 Findings: 1400. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-39
Chemical: IRON
Sample Collected: 05/08/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 05/01/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 05/01/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 04/24/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 04/24/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 04/17/2008 Findings: 100. UG/L
Chemical: IRON
Sample Collected: 04/17/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 04/10/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 04/10/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 04/03/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 04/03/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 03/27/2008 Findings: 100. UG/L
Chemical: IRON
Sample Collected: 03/27/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 03/20/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 03/20/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 03/13/2008 Findings: 86. UG/L
Chemical: IRON
Sample Collected: 03/13/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 03/06/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 03/06/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 02/28/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 02/28/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 02/21/2008 Findings: 120. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-40
Chemical: IRON
Sample Collected: 08/14/2008 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 08/07/2008 Findings: 96. UG/L
Chemical: IRON
Sample Collected: 08/07/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 07/31/2008 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 07/31/2008 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 07/24/2008 Findings: 100. UG/L
Chemical: IRON
Sample Collected: 07/24/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 07/17/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 07/17/2008 Findings: 1400. UG/L
Chemical: MANGANESE
Sample Collected: 07/10/2008 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 07/10/2008 Findings: 1400. UG/L
Chemical: MANGANESE
Sample Collected: 07/03/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 07/03/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 06/26/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 06/26/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 06/19/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 06/19/2008 Findings: 1900. UG/L
Chemical: MANGANESE
Sample Collected: 05/22/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 05/22/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 05/15/2008 Findings: 150. UG/L
Chemical: IRON
Sample Collected: 05/15/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 05/08/2008 Findings: 140. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-41
Chemical: MANGANESE
Sample Collected: 10/30/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 10/30/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 10/23/2008 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 10/23/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 10/16/2008 Findings: 100. UG/L
Chemical: IRON
Sample Collected: 10/16/2008 Findings: 920. UG/L
Chemical: MANGANESE
Sample Collected: 10/09/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 10/09/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 10/02/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 10/02/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 09/25/2008 Findings: 82. UG/L
Chemical: IRON
Sample Collected: 09/25/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 09/18/2008 Findings: 84. UG/L
Chemical: IRON
Sample Collected: 09/18/2008 Findings: 870. UG/L
Chemical: MANGANESE
Sample Collected: 09/11/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 09/11/2008 Findings: 1400. UG/L
Chemical: MANGANESE
Sample Collected: 09/04/2008 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 09/04/2008 Findings: 1300. UG/L
Chemical: MANGANESE
Sample Collected: 08/28/2008 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 08/28/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 08/21/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 08/21/2008 Findings: 1200. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-42
Chemical: MANGANESE
Sample Collected: 05/04/2009 Findings: 70. UG/L
Chemical: IRON
Sample Collected: 05/04/2009 Findings: 970. UG/L
Chemical: MANGANESE
Sample Collected: 04/06/2009 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 04/06/2009 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 03/05/2009 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 03/05/2009 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 02/05/2009 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 02/05/2009 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 12/18/2008 Findings: 81. UG/L
Chemical: IRON
Sample Collected: 12/18/2008 Findings: 910. UG/L
Chemical: MANGANESE
Sample Collected: 12/11/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 12/11/2008 Findings: 1200. UG/L
Chemical: MANGANESE
Sample Collected: 12/04/2008 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 12/04/2008 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 11/26/2008 Findings: 100. UG/L
Chemical: IRON
Sample Collected: 11/26/2008 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 11/20/2008 Findings: 100. UG/L
Chemical: IRON
Sample Collected: 11/20/2008 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 11/13/2008 Findings: 87. UG/L
Chemical: IRON
Sample Collected: 11/13/2008 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 11/06/2008 Findings: 100. UG/L
Chemical: IRON
Sample Collected: 11/06/2008 Findings: 950. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-43
Chemical: MANGANESE
Sample Collected: 04/05/2010 Findings: 48. UG/L
Chemical: IRON
Sample Collected: 04/05/2010 Findings: 880. UG/L
Chemical: MANGANESE
Sample Collected: 03/04/2010 Findings: 53. UG/L
Chemical: IRON
Sample Collected: 03/04/2010 Findings: 850. UG/L
Chemical: MANGANESE
Sample Collected: 02/11/2010 Findings: 64. UG/L
Chemical: IRON
Sample Collected: 02/11/2010 Findings: 920. UG/L
Chemical: MANGANESE
Sample Collected: 01/11/2010 Findings: 66. UG/L
Chemical: IRON
Sample Collected: 01/11/2010 Findings: 700. UG/L
Chemical: MANGANESE
Sample Collected: 12/03/2009 Findings: 43. UG/L
Chemical: IRON
Sample Collected: 12/03/2009 Findings: 840. UG/L
Chemical: MANGANESE
Sample Collected: 11/02/2009 Findings: 88. UG/L
Chemical: IRON
Sample Collected: 11/02/2009 Findings: 1000. UG/L
Chemical: MANGANESE
Sample Collected: 10/01/2009 Findings: 59. UG/L
Chemical: IRON
Sample Collected: 10/01/2009 Findings: 980. UG/L
Chemical: MANGANESE
Sample Collected: 09/03/2009 Findings: 78. UG/L
Chemical: IRON
Sample Collected: 09/03/2009 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 08/03/2009 Findings: 48. UG/L
Chemical: IRON
Sample Collected: 08/03/2009 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 07/02/2009 Findings: 50. UG/L
Chemical: IRON
Sample Collected: 07/02/2009 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 06/04/2009 Findings: 57. UG/L
Chemical: IRON
Sample Collected: 06/04/2009 Findings: 950. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-44
Date inventoried: Not Reported Mean greenwich time offset: PST Site type: Ground-water other than Spring Date construction: 19711221 Topographic: Valley flat
Hydrologic: Russian. California. Area = 1470 sq.mi.

Altitude datum: National Geodetic Vertical Datum of 1929 Altitude accuracy: 10
Altitude method: Interpolated from topographic map
Altitude: 99
Location map: COTATI Map scale: 24000
Country: US Land net: NENENWS 26T 06NR 08WM
State: 06 County: 097
Dec latlong datum: NAD83 District: 06
Coor accr: F Latlong datum: NAD27
Dec lon: -122.71470989 Coor meth: M
Longitude: 1224249 Dec lat: 38.34380338
Latitude: 382038 EDR Site id: USGS3236681
Site name: 006N008W26C001M
Agency cd: USGS Site no: 382038122424901
20 North
1/2 - 1 Mile
Lower
FED USGS USGS3236681
Chemical: MANGANESE
Sample Collected: 04/28/2010 Findings: 63. UG/L
Chemical: IRON
Sample Collected: 04/28/2010 Findings: 1200. UG/L
Chemical: BARIUM
Sample Collected: 04/28/2010 Findings: 150. UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 04/28/2010 Findings: 0.42 MG/L
Chemical: CHLORIDE
Sample Collected: 04/28/2010 Findings: 32. MG/L
Chemical: SODIUM
Sample Collected: 04/28/2010 Findings: 34. MG/L
Chemical: MAGNESIUM
Sample Collected: 04/28/2010 Findings: 8.1 MG/L
Chemical: CALCIUM
Sample Collected: 04/28/2010 Findings: 15. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 04/28/2010 Findings: 71. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 04/28/2010 Findings: 130. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 04/28/2010 Findings: 110. MG/L
Chemical: PH, LABORATORY
Sample Collected: 04/28/2010 Findings: 7.

Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 04/28/2010 Findings: 320. US
Chemical: ODOR THRESHOLD @ 60 C
Sample Collected: 04/28/2010 Findings: 1.2 TON
Chemical: COLOR
Sample Collected: 04/28/2010 Findings: 15. UNITS
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-45
Chemical: CALCIUM
Sample Collected: 07/31/2006 Findings: 22. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 07/31/2006 Findings: 140. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 07/31/2006 Findings: 130. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 07/31/2006 Findings: 100. MG/L
Chemical: PH, LABORATORY
Sample Collected: 07/31/2006 Findings: 6.8
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 07/31/2006 Findings: 490. US
Chemical: COLOR
Sample Collected: 07/31/2006 Findings: 10. UNITS
Area Served: Not Reported
Pop Served: 90 Connections: 23
COTATI, CA 94931
7710 ISABEL AVE.

Organization That Operates System:

System Name: MADRONE MUTUAL WATER COMPANY
System Number: 4900513
Source Name: WELL 02
Source Lat/Long: 381953.0 1224341.0 Precision: 10 Feet (1/10 Second) Water Type: Well/Groundwater Well Status: Active Raw
District Number: 03 Station Type: WELL/AMBNT/MUN/INTAKE/SUPPLY FRDS Number: 4900513002 County: Sonoma
Prime Station Code: 4900513-002 User ID: RXR
Water System Information:

F21
WSW
1/2 - 1 Mile
Higher
CA WELLS 20428
Ground-water levels, Number of Measurements: 0
Ground water data count: 0
Ground water data begin date: 0000-00-00 Ground water data end date: 0000-00-00 Water quality data end date:0000-00-00 Water quality data count: 0 Peak flow data count: 0 Water quality data begin date: 0000-00-00 Peak flow data begin date: 0000-00-00 Peak flow data end date: 0000-00-00 Daily flow data end date: 0000-00-00 Daily flow data count: 0 Real time data flag: 0 Daily flow data begin date: 0000-00-00 Project number: CA-9-358M
Source of depth data: Not Reported
Well depth: 603 Hole depth: 603
Aquifer: Not Reported
Aquifer Type: Not Reported
Type of ground water site: Single well, other than collector or Ranney type Local standard time flag: Y
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-46
Chemical: RADIUM 228 COUNTING ERROR
Sample Collected: 11/04/2007 Findings: 0.551 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 11/04/2007 Findings: 0.965 PCI/L
Chemical: RADIUM 228 MDA95
Sample Collected: 06/11/2007 Findings: 0.5 PCI/L
Chemical: GROSS ALPHA MDA95
Sample Collected: 06/11/2007 Findings: 1.6 PCI/L
Chemical: RADIUM 228 COUNTING ERROR
Sample Collected: 06/11/2007 Findings: 0.519 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 06/11/2007 Findings: 0.672 PCI/L
Chemical: RADIUM 228 MDA95
Sample Collected: 04/09/2007 Findings: 0.5 PCI/L
Chemical: GROSS ALPHA MDA95
Sample Collected: 04/09/2007 Findings: 1.4 PCI/L
Chemical: RADIUM 228 COUNTING ERROR
Sample Collected: 04/09/2007 Findings: 0.468 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 04/09/2007 Findings: 0.74 PCI/L
Chemical: RADIUM 228 COUNTING ERROR
Sample Collected: 08/01/2006 Findings: 0.537 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 08/01/2006 Findings: 0.711 PCI/L
Chemical: TURBIDITY, LABORATORY
Sample Collected: 07/31/2006 Findings: 9.8 NTU
Chemical: NITRATE (AS NO3)
Sample Collected: 07/31/2006 Findings: 5.9 MG/L
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 07/31/2006 Findings: 250. MG/L
Chemical: MANGANESE
Sample Collected: 07/31/2006 Findings: 55. UG/L
Chemical: IRON
Sample Collected: 07/31/2006 Findings: 1500. UG/L
Chemical: ARSENIC
Sample Collected: 07/31/2006 Findings: 4.6 UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 07/31/2006 Findings: 0.36 MG/L
Chemical: CHLORIDE
Sample Collected: 07/31/2006 Findings: 44. MG/L
Chemical: SODIUM
Sample Collected: 07/31/2006 Findings: 42. MG/L
Chemical: MAGNESIUM
Sample Collected: 07/31/2006 Findings: 20. MG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-47
Chemical: AGGRSSIVE INDEX (CORROSIVITY)
Sample Collected: 06/22/2009 Findings: 10.6
Chemical: TURBIDITY, LABORATORY
Sample Collected: 06/22/2009 Findings: 13. NTU
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 06/22/2009 Findings: 320. MG/L
Chemical: MANGANESE
Sample Collected: 06/22/2009 Findings: 120. UG/L
Chemical: IRON
Sample Collected: 06/22/2009 Findings: 2600. UG/L
Chemical: BARIUM
Sample Collected: 06/22/2009 Findings: 150. UG/L
Chemical: ARSENIC
Sample Collected: 06/22/2009 Findings: 7.8 UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 06/22/2009 Findings: 0.42 MG/L
Chemical: CHLORIDE
Sample Collected: 06/22/2009 Findings: 49. MG/L
Chemical: SODIUM
Sample Collected: 06/22/2009 Findings: 36. MG/L
Chemical: MAGNESIUM
Sample Collected: 06/22/2009 Findings: 20. MG/L
Chemical: CALCIUM
Sample Collected: 06/22/2009 Findings: 24. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 06/22/2009 Findings: 140. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 06/22/2009 Findings: 120. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 06/22/2009 Findings: 100. MG/L
Chemical: PH, LABORATORY
Sample Collected: 06/22/2009 Findings: 6.8
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 06/22/2009 Findings: 500. US
Chemical: ODOR THRESHOLD @ 60 C
Sample Collected: 06/22/2009 Findings: 6. TON
Chemical: COLOR
Sample Collected: 06/22/2009 Findings: 5. UNITS
Chemical: NITRATE (AS NO3)
Sample Collected: 03/23/2009 Findings: 6.5 MG/L
Chemical: RADIUM 228 MDA95
Sample Collected: 11/04/2007 Findings: 0.55 PCI/L
Chemical: GROSS ALPHA MDA95
Sample Collected: 11/04/2007 Findings: 1.4 PCI/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-48
E23
SE
1/2 - 1 Mile
Higher
FED USGS USGS3236648
Area Served: Not Reported
Pop Served: 90 Connections: 23
COTATI, CA 94931
7710 ISABEL AVE.

Organization That Operates System:

System Name: MADRONE MUTUAL WATER COMPANY
System Number: 4900513
Source Name: WELL 01 - INACTIVE
Source Lat/Long: 381952.0 1224341.0 Precision: 100 Feet (one Second) Water Type: Well/Groundwater Well Status: Inactive Raw
District Number: 03 Station Type: WELL/AMBNT/MUN/INTAKE FRDS Number: 4900513001 County: Sonoma
Prime Station Code: 06N/08W-27Q01 M User ID: RXR
Water System Information:

F22
WSW
1/2 - 1 Mile
Higher
CA WELLS 6653
Chemical: MANGANESE
Sample Collected: 04/11/2011 Findings: 170. UG/L
Chemical: IRON
Sample Collected: 04/11/2011 Findings: 3200. UG/L
Chemical: MANGANESE
Sample Collected: 09/27/2010 Findings: 46. UG/L
Chemical: IRON
Sample Collected: 09/27/2010 Findings: 320. UG/L
Chemical: NITRATE (AS NO3)
Sample Collected: 06/21/2010 Findings: 8.6 MG/L
Chemical: MANGANESE
Sample Collected: 06/21/2010 Findings: 47. UG/L
Chemical: IRON
Sample Collected: 06/21/2010 Findings: 1100. UG/L
Chemical: MANGANESE
Sample Collected: 03/15/2010 Findings: 150. UG/L
Chemical: IRON
Sample Collected: 03/15/2010 Findings: 2500. UG/L
Chemical: MANGANESE
Sample Collected: 11/09/2009 Findings: 130. UG/L
Chemical: IRON
Sample Collected: 11/09/2009 Findings: 2900. UG/L
Chemical: MANGANESE
Sample Collected: 09/28/2009 Findings: 110. UG/L
Chemical: IRON
Sample Collected: 09/28/2009 Findings: 3200. UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-49
Area Served: COTATI
Pop Served: 6715 Connections: 2057
COTATI, CA 94931
P O BOX 428
Organization That Operates System:

System Name: Cotati, City of
System Number: 4910016
Source Name: WELL 01 - DESTROYED
Source Lat/Long: 381941.7 1224217.3 Precision: 100 Feet (one Second) Water Type: Well/Groundwater Well Status: Destroyed
District Number: 03 Station Type: WELL/AMBNT/MUN/INTAKE FRDS Number: 4910016001 County: Sonoma
Prime Station Code: 06N/08W-35A02 M User ID: RXR
Water System Information:
24 SE
1/2 - 1 Mile
Higher
CA WELLS 6657
Ground-water levels, Number of Measurements: 0
Ground water data count: Not Reported
Ground water data begin date: Not Reported Ground water data end date: Not Reported Water quality data end date:Not Reported Water quality data count: Not Reported Peak flow data count: Not Reported Water quality data begin date: Not Reported Peak flow data begin date: Not Reported Peak flow data end date: Not Reported Daily flow data end date: Not Reported Daily flow data count: Not Reported Real time data flag: Not Reported Daily flow data begin date: Not Reported Project number: CA-9-358M
Source of depth data: Not Reported
Well depth: 670 Hole depth: Not Reported
Aquifer: Not Reported
Aquifer Type: Not Reported
Type of ground water site: Single well, other than collector or Ranney type Local standard time flag: Y
Date inventoried: Not Reported Mean greenwich time offset: PST Site type: Ground-water other than Spring Date construction: 19470101 Topographic: Valley flat
Hydrologic: Russian. California. Area = 1470 sq.mi.

System Name: Rohnert Park, City of
System Number: 4910014
Source Name: WELL 05
Source Lat/Long: 382035.5 1224219.5 Precision: 100 Feet (one Second) Water Type: Well/Groundwater Well Status: Active Raw
District Number: 03 Station Type: WELL/AMBNT/MUN/INTAKE FRDS Number: 4910014004 County: Sonoma
Prime Station Code: 06N/08W-26A02 M User ID: RXR
Water System Information:

G26
NE
1/2 - 1 Mile
Higher
CA WELLS 6650
Enforcement Date: Not Reported Enf. Action: Not Reported Violation ID: 95V0001
Compliance Period: 1993-07-01 - 2015-12-31
Contaminant: LEAD & COPPER RULE
Violation Type: Initial Tap Sampling for Pb and Cu
System Name: BOONVILLE APARTMENTS
ENFORCEMENT INFORMATION:

Violations information not reported.

Treatment Class: Untreated Population: 00000044
City Served: Not Reported
Facility Latitude: 38 19 36 Facility Longitude: 122 42 21 UKIAH, CA 95482
1144 HELEN AVENUE

BOONVILLE APARTMENTS
Addressee / Facility: System Owner/Responsible Party
UKIAH, CA 95482
14501 HWY

BOONVILLE APARTMENTS
PWS Name: BOONVILLE APARTMENTS
Date Initiated: 8601 Date Deactivated: Not Reported
PWS ID: CA2300830
25 SE
1/2 - 1 Mile
Higher
FRDS PWS CA2300830
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-51
Chemical: AGGRSSIVE INDEX (CORROSIVITY)
Sample Collected: 09/12/2006 Findings: 11.4
Chemical: NITRATE (AS NO3)
Sample Collected: 09/12/2006 Findings: 3.3 MG/L
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 09/12/2006 Findings: 230. MG/L
Chemical: ZINC
Sample Collected: 09/12/2006 Findings: 69. UG/L
Chemical: BARIUM
Sample Collected: 09/12/2006 Findings: 110. UG/L
Chemical: ARSENIC
Sample Collected: 09/12/2006 Findings: 5.4 UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 09/12/2006 Findings: 0.18 MG/L
Chemical: CHLORIDE
Sample Collected: 09/12/2006 Findings: 10. MG/L
Chemical: POTASSIUM
Sample Collected: 09/12/2006 Findings: 2.1 MG/L
Chemical: SODIUM
Sample Collected: 09/12/2006 Findings: 23. MG/L
Chemical: MAGNESIUM
Sample Collected: 09/12/2006 Findings: 16. MG/L
Chemical: CALCIUM
Sample Collected: 09/12/2006 Findings: 22. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 09/12/2006 Findings: 120. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 09/12/2006 Findings: 180. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 09/12/2006 Findings: 150. MG/L
Chemical: PH, LABORATORY
Sample Collected: 09/12/2006 Findings: 7.5
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 09/12/2006 Findings: 320. US
Chemical: URANIUM COUNTING ERROR
Sample Collected: 09/12/2006 Findings: 0.18 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 09/12/2006 Findings: 1.09 PCI/L
Chemical: URANIUM COUNTING ERROR
Sample Collected: 06/27/2006 Findings: 0.73 PCI/L
Chemical: URANIUM (PCI/L)
Sample Collected: 06/27/2006 Findings: 2.43 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 06/27/2006 Findings: 1.46 PCI/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-52
Chemical: POTASSIUM
Sample Collected: 07/21/2009 Findings: 2.5 MG/L
Chemical: SODIUM
Sample Collected: 07/21/2009 Findings: 21. MG/L
Chemical: MAGNESIUM
Sample Collected: 07/21/2009 Findings: 26. MG/L
Chemical: CALCIUM
Sample Collected: 07/21/2009 Findings: 46. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 07/21/2009 Findings: 220. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 07/21/2009 Findings: 290. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 07/21/2009 Findings: 240. MG/L
Chemical: PH, LABORATORY
Sample Collected: 07/21/2009 Findings: 7.3
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 07/21/2009 Findings: 520. US
Chemical: NITRATE (AS NO3)
Sample Collected: 07/14/2009 Findings: 11. MG/L
Chemical: NITRATE (AS NO3)
Sample Collected: 07/09/2008 Findings: 9.3 MG/L
Chemical: NITRATE (AS NO3)
Sample Collected: 09/18/2007 Findings: 9.4 MG/L
Chemical: URANIUM MDA95
Sample Collected: 03/20/2007 Findings: 2.e-002 PCI/L
Chemical: GROSS ALPHA MDA95
Sample Collected: 03/20/2007 Findings: 0.76 PCI/L
Chemical: URANIUM COUNTING ERROR
Sample Collected: 03/20/2007 Findings: 1.19 PCI/L
Chemical: URANIUM (PCI/L)
Sample Collected: 03/20/2007 Findings: 4.04 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 03/20/2007 Findings: 1.98 PCI/L
Chemical: GROSS ALPHA
Sample Collected: 03/20/2007 Findings: 4.04 PCI/L
Chemical: URANIUM COUNTING ERROR
Sample Collected: 12/21/2006 Findings: 0.77 PCI/L
Chemical: URANIUM (PCI/L)
Sample Collected: 12/21/2006 Findings: 2.6 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 12/21/2006 Findings: 2.42 PCI/L
Chemical: GROSS ALPHA
Sample Collected: 12/21/2006 Findings: 5.61 PCI/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-53
Ground-water levels, Number of Measurements: 0
Ground water data count: 0
Ground water data begin date: 0000-00-00 Ground water data end date: 0000-00-00 Water quality data end date:0000-00-00 Water quality data count: 0 Peak flow data count: 0 Water quality data begin date: 0000-00-00 Peak flow data begin date: 0000-00-00 Peak flow data end date: 0000-00-00 Daily flow data end date: 0000-00-00 Daily flow data count: 0 Real time data flag: 0 Daily flow data begin date: 0000-00-00 Project number: CA-9-358M
Source of depth data: Not Reported
Well depth: 473 Hole depth: Not Reported
Aquifer: Not Reported
Aquifer Type: Not Reported
Type of ground water site: Single well, other than collector or Ranney type Local standard time flag: Y
Date inventoried: Not Reported Mean greenwich time offset: PST Site type: Ground-water other than Spring Date construction: 19660101 Topographic: Valley flat
Hydrologic: Russian. California. Area = 1470 sq.mi.

Altitude datum: National Geodetic Vertical Datum of 1929 Altitude accuracy: 10
Altitude method: Interpolated from topographic map
Altitude: 100
Location map: COTATI Map scale: 24000
Country: US Land net: NWNENES 26T 06NR 08WM
State: 06 County: 097
Dec latlong datum: NAD83 District: 06
Coor accr: F Latlong datum: NAD27
Dec lon: -122.70665411 Coor meth: M
Longitude: 1224220 Dec lat: 38.34352556
Latitude: 382037 EDR Site id: USGS3236679
Site name: 006N008W26A002M
Agency cd: USGS Site no: 382037122422001
G27
NE
1/2 - 1 Mile
Higher
FED USGS USGS3236679
Chemical: NITRATE (AS NO3)
Sample Collected: 07/20/2010 Findings: 9.9 MG/L
Chemical: AGGRSSIVE INDEX (CORROSIVITY)
Sample Collected: 07/21/2009 Findings: 11.7
Chemical: NITRATE (AS NO3)
Sample Collected: 07/21/2009 Findings: 9.4 MG/L
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 07/21/2009 Findings: 360. MG/L
Chemical: BARIUM
Sample Collected: 07/21/2009 Findings: 150. UG/L
Chemical: ARSENIC
Sample Collected: 07/21/2009 Findings: 4.6 UG/L
Chemical: CHLORIDE
Sample Collected: 07/21/2009 Findings: 16. MG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-54
Peak flow data begin date: 0000-00-00 Peak flow data end date: 0000-00-00 Daily flow data end date: 0000-00-00 Daily flow data count: 0 Real time data flag: 0 Daily flow data begin date: 0000-00-00 Project number: CA-9-358M
Source of depth data: Not Reported
Well depth: 500 Hole depth: 500
Aquifer: Not Reported
Aquifer Type: Not Reported
Type of ground water site: Single well, other than collector or Ranney type Local standard time flag: Y
Date inventoried: Not Reported Mean greenwich time offset: PST Site type: Ground-water other than Spring Date construction: 19760726 Topographic: Valley flat
Hydrologic: Russian. California. Area = 1470 sq.mi.

Altitude datum: National Geodetic Vertical Datum of 1929 Altitude accuracy: 10
Altitude method: Interpolated from topographic map
Altitude: 103
Location map: COTATI Map scale: 24000
Country: US Land net: SESWNWS 25T 06NR 08WM
State: 06 County: 097
Dec latlong datum: NAD83 District: 06
Coor accr: F Latlong datum: NAD27
Dec lon: -122.69998729 Coor meth: M
Longitude: 1224156 Dec lat: 38.3371368
Latitude: 382014 EDR Site id: USGS3236664
Site name: 006N008W25F001M
Agency cd: USGS Site no: 382014122415601
H29
ENE
1/2 - 1 Mile
Higher
FED USGS USGS3236664
Chemical: BROMODICHLORMETHANE (THM)
Sample Collected: 10/05/2000 Findings: 5. UG/L
Area Served: S ROSA PETLMA& VIC
Pop Served: 500 Connections: 70
SANTA ROSA, CA 95401
2150 WEST COLLEGE AVENUE
Organization That Operates System:

System Name: SONOMA COUNTY WATER AGENCY
System Number: 4910020
Source Name: COTATI TANK - THM
Source Lat/Long: 381919.0 1224326.0 Precision: 1,000 Feet (10 Seconds) Water Type: M Well Status: Distribution System Sample Point Treated District Number: 03 Station Type: RANNEY/AMBNT/MUN/INTAKE FRDS Number: 4910020009 County: Sonoma
Prime Station Code: C49/020-COTATI User ID: RXR
Water System Information:
28 SSW
1/2 - 1 Mile
Higher
CA WELLS 22269
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-55
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 09/12/2006 Findings: 260. MG/L
Chemical: PH, LABORATORY
Sample Collected: 09/12/2006 Findings: 7.6
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 09/12/2006 Findings: 630. US
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 03/28/2006 Findings: 1.72 PCI/L
Chemical: GROSS ALPHA
Sample Collected: 03/28/2006 Findings: 3.37 PCI/L
Area Served: ROHNERT PARK
Pop Served: 38511 Connections: 8067
ROHNERT PARK, CA 94928
600 ENTERPRISE DRIVE
Organization That Operates System:

System Name: Rohnert Park, City of
System Number: 4910014
Source Name: WELL 13
Source Lat/Long: 382015.6 1224153.0 Precision: 100 Feet (one Second) Water Type: Well/Groundwater Well Status: Active Raw
District Number: 03 Station Type: WELL/AMBNT/MUN/INTAKE FRDS Number: 4910014013 County: Sonoma
Prime Station Code: 06N/08W-25F01 M User ID: RXR
Water System Information:

H32
ENE
1/2 - 1 Mile
Higher
CA WELLS 6647
Date: 10/25/1993
Average Water Depth: Not Reported
Deep Water Depth: Not Reported
Shallow Water Depth: Not Reported
Groundwater Flow: SE
I31 Site ID: Not Reported
North
1/2 - 1 Mile
Lower
AQUIFLOW 54122
Date: 03/1999
Average Water Depth: Not Reported
Deep Water Depth: Not Reported
Shallow Water Depth: Not Reported
Groundwater Flow: N
I30 Site ID: Not Reported
North
1/2 - 1 Mile
Lower
AQUIFLOW 54120
Ground-water levels, Number of Measurements: 0
Ground water data count: 0
Ground water data begin date: 0000-00-00 Ground water data end date: 0000-00-00 Water quality data end date:0000-00-00 Water quality data count: 0 Peak flow data count: 0 Water quality data begin date: 0000-00-00 GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-56
Chemical: SPECIFIC CONDUCTANCE
Sample Collected: 07/21/2009 Findings: 610. US
Chemical: NITRATE (AS NO3)
Sample Collected: 07/14/2009 Findings: 18. MG/L
Chemical: NITRATE (AS NO3)
Sample Collected: 07/23/2008 Findings: 18. MG/L
Chemical: NITRATE (AS NO3)
Sample Collected: 09/18/2007 Findings: 19. MG/L
Chemical: GROSS ALPHA MDA95
Sample Collected: 09/18/2007 Findings: 0.12 PCI/L
Chemical: GROSS ALPHA COUNTING ERROR
Sample Collected: 09/18/2007 Findings: 2.06 PCI/L
Chemical: GROSS ALPHA
Sample Collected: 09/18/2007 Findings: 4.19 PCI/L
Chemical: AGGRSSIVE INDEX (CORROSIVITY)
Sample Collected: 09/12/2006 Findings: 12.2
Chemical: TURBIDITY, LABORATORY
Sample Collected: 09/12/2006 Findings: 0.1 NTU
Chemical: NITRATE (AS NO3)
Sample Collected: 09/12/2006 Findings: 19. MG/L
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 09/12/2006 Findings: 430. MG/L
Chemical: SELENIUM
Sample Collected: 09/12/2006 Findings: 7. UG/L
Chemical: BARIUM
Sample Collected: 09/12/2006 Findings: 110. UG/L
Chemical: ARSENIC
Sample Collected: 09/12/2006 Findings: 5. UG/L
Chemical: FLUORIDE (F) (NATURAL-SOURCE)
Sample Collected: 09/12/2006 Findings: 0.11 MG/L
Chemical: CHLORIDE
Sample Collected: 09/12/2006 Findings: 22. MG/L
Chemical: POTASSIUM
Sample Collected: 09/12/2006 Findings: 3.8 MG/L
Chemical: SODIUM
Sample Collected: 09/12/2006 Findings: 23. MG/L
Chemical: MAGNESIUM
Sample Collected: 09/12/2006 Findings: 34. MG/L
Chemical: CALCIUM
Sample Collected: 09/12/2006 Findings: 63. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 09/12/2006 Findings: 300. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 09/12/2006 Findings: 320. MG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-57
Chemical: NITRATE (AS NO3)
Sample Collected: 07/20/2010 Findings: 17. MG/L
Chemical: AGGRSSIVE INDEX (CORROSIVITY)
Sample Collected: 07/21/2009 Findings: 11.9
Chemical: TURBIDITY, LABORATORY
Sample Collected: 07/21/2009 Findings: 6.e-002 NTU
Chemical: NITRATE (AS NO3)
Sample Collected: 07/21/2009 Findings: 18. MG/L
Chemical: TOTAL DISSOLVED SOLIDS
Sample Collected: 07/21/2009 Findings: 430. MG/L
Chemical: ARSENIC
Sample Collected: 07/21/2009 Findings: 4.4 UG/L
Chemical: CHLORIDE
Sample Collected: 07/21/2009 Findings: 22. MG/L
Chemical: POTASSIUM
Sample Collected: 07/21/2009 Findings: 3.3 MG/L
Chemical: SODIUM
Sample Collected: 07/21/2009 Findings: 22. MG/L
Chemical: MAGNESIUM
Sample Collected: 07/21/2009 Findings: 31. MG/L
Chemical: CALCIUM
Sample Collected: 07/21/2009 Findings: 56. MG/L
Chemical: HARDNESS (TOTAL) AS CACO3
Sample Collected: 07/21/2009 Findings: 270. MG/L
Chemical: BICARBONATE ALKALINITY
Sample Collected: 07/21/2009 Findings: 340. MG/L
Chemical: ALKALINITY (TOTAL) AS CACO3
Sample Collected: 07/21/2009 Findings: 270. MG/L
Chemical: PH, LABORATORY
Sample Collected: 07/21/2009 Findings: 7.3
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-58
Site id: CAOG70000198200
Long83: -122.710089
Lat83: 38.342375
Range: 8W Basemeridi: MD
Section: 26 Township: 6N
Fieldname: Any Field Areaname: Any Area
Operatorna: Santa Rosa Exploration Co.

Wellnumber: 1
Leasename: Stephens-Rohnert
Confidenti: Not Reported Countyname: Sonoma
Gissourcec: HUD Wellsymbol: DH
Geodistric: 0 Statuscode: 006
Apinumber: 09700046 District: 6
1 NNE
1/2 - 1 Mile
OIL_GAS CAOG70000198200
Map ID
Direction
Distance Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®
TC3109254.2s Page A-59
Basement Not Reported Not Reported Not Reported Not Reported Living Area - 2nd Floor Not Reported Not Reported Not Reported Not Reported Living Area - 1st Floor -0.600 pCi/L 100% 0% 0%
Area Average Activity % <4 pCi/L % 4-20 pCi/L % >20 pCi/L Number of sites tested: 1
Federal Area Radon Information for Zip Code: 94931
: Zone 3 indoor average level < 2 pCi/L.
: Zone 2 indoor average level >= 2 pCi/L and <= 4 pCi/L.

Note: Zone 1 indoor average level > 4 pCi/L.

Federal EPA Radon Zone for SONOMA County: 3
94931 7 0
______ ________ ________
Zipcode Num Tests > 4 pCi/L
Radon Test Results
State Database: CA Radon

AREA RADON INFORMATION

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS
RADON
®

TOPOGRAPHIC INFORMATION
USGS 7.5’ Digital Elevation Model (DEM)
Source: United States Geologic Survey
EDR acquired the USGS 7.5’ Digital Elevation Model in 2002 and updated it in 2006. The 7.5 minute DEM corresponds to the USGS 1:24,000- and 1:25,000-scale topographic quadrangle maps. The DEM provides elevation data with consistent elevation units and projection.

Scanned Digital USGS 7.5’ Topographic Map (DRG)
Source: United States Geologic Survey
A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey topographic map. The map images are made by scanning published paper maps on high-resolution scanners. The raster image is georeferenced and fit to the Universal Transverse Mercator (UTM) projection.

HYDROLOGIC INFORMATION
Flood Zone Data: This data, available in select counties across the country, was obtained by EDR in 2003 & 2011 from the Federal Emergency Management Agency (FEMA). Data depicts 100-year and 500-year flood zones as defined by FEMA.

NWI: National Wetlands Inventory. This data, available in select counties across the country, was obtained by EDR in 2002 and 2005 from the U.S. Fish and Wildlife Service.

HYDROGEOLOGIC INFORMATION
AQUIFLOW Information System R
Source: EDR proprietary database of groundwater flow information EDR has developed the AQUIFLOW Information System (AIS) to provide data on the general direction of groundwater flow at specific points. EDR has reviewed reports submitted to regulatory authorities at select sites and has extracted the date of the report, hydrogeologically determined groundwater flow direction and depth to water table information.

GEOLOGIC INFORMATION
Geologic Age and Rock Stratigraphic Unit
Source: P.G. Schruben, R.E. Arndt and W.J. Bawiec, Geology of the Conterminous U.S. at 1:2,500,000 Scale - A digital representation of the 1974 P.B. King and H.M. Beikman Map, USGS Digital Data Series DDS - 11 (1994).

STATSGO: State Soil Geographic Database
Source: Department of Agriculture, Natural Resources Conservation Services The U.S. Department of Agriculture’s (USDA) Natural Resources Conservation Service (NRCS) leads the national Conservation Soil Survey (NCSS) and is responsible for collecting, storing, maintaining and distributing soil survey information for privately owned lands in the United States. A soil map in a soil survey is a representation of soil patterns in a landscape. Soil maps for STATSGO are compiled by generalizing more detailed (SSURGO) soil survey maps.

SSURGO: Soil Survey Geographic Database
Source: Department of Agriculture, Natural Resources Conservation Services (NRCS) Telephone: 800-672-5559
SSURGO is the most detailed level of mapping done by the Natural Resources Conservation Services, mapping scales generally range from 1:12,000 to 1:63,360. Field mapping methods using national standards are used to construct the soil maps in the Soil Survey Geographic (SSURGO) database. SSURGO digitizing duplicates the original soil survey maps. This level of mapping is designed for use by landowners, townships and county natural resource planning and management.

TC3109254.2s Page A-60

PHYSICAL SETTING SOURCE RECORDS SEARCHED

LOCAL / REGIONAL WATER AGENCY RECORDS

FEDERAL WATER WELLS
PWS: Public Water Systems
Source: EPA/Office of Drinking Water
Telephone: 202-564-3750
Public Water System data from the Federal Reporting Data System. A PWS is any water system which provides water to at least 25 people for at least 60 days annually. PWSs provide water from wells, rivers and other sources.

PWS ENF: Public Water Systems Violation and Enforcement Data Source: EPA/Office of Drinking Water
Telephone: 202-564-3750
Violation and Enforcement data for Public Water Systems from the Safe Drinking Water Information System (SDWIS) after August 1995. Prior to August 1995, the data came from the Federal Reporting Data System (FRDS).

USGS Water Wells: USGS National Water Inventory System (NWIS) This database contains descriptive information on sites where the USGS collects or has collected data on surface water and/or groundwater. The groundwater data includes information on wells, springs, and other sources of groundwater.

STATE RECORDS
Water Well Database
Source: Department of Water Resources
Telephone: 916-651-9648
California Drinking Water Quality Database
Source: Department of Health Services
Telephone: 916-324-2319
The database includes all drinking water compliance and special studies monitoring for the state of California since 1984. It consists of over 3,200,000 individual analyses along with well and water system information.

OTHER STATE DATABASE INFORMATION
California Oil and Gas Well Locations
Source: Department of Conservation
Telephone: 916-323-1779
Oil and Gas well locations in the state.

RADON
State Database: CA Radon
Source: Department of Health Services
Telephone: 916-324-2208
Radon Database for California
Area Radon Information
Source: USGS
Telephone: 703-356-4020
The National Radon Database has been developed by the U.S. Environmental Protection Agency (USEPA) and is a compilation of the EPA/State Residential Radon Survey and the National Residential Radon Survey.

The study covers the years 1986 - 1992. Where necessary data has been supplemented by information collected at private sources such as universities and research institutions.

EPA Radon Zones
Source: EPA
Telephone: 703-356-4020
Sections 307 & 309 of IRAA directed EPA to list and identify areas of U.S. with the potential for elevated indoor radon levels.

TC3109254.2s Page A-61

PHYSICAL SETTING SOURCE RECORDS SEARCHED
OTHER
Airport Landing Facilities: Private and public use landing facilities Source: Federal Aviation Administration, 800-457-6656
Epicenters: World earthquake epicenters, Richter 5 or greater Source: Department of Commerce, National Oceanic and Atmospheric Administration California Earthquake Fault Lines: The fault lines displayed on EDR’s Topographic map are digitized quaternary fault lines, prepared in 1975 by the United State Geological Survey. Additional information (also from 1975) regarding activity at specific fault lines comes from California’s Preliminary Fault Activity Map prepared by the California Division of Mines and Geology.

STREET AND ADDRESS INFORMATION
© 2010 Tele Atlas North America, Inc. All rights reserved. This material is proprietary and the subject of copyright protection and other intellectual property rights owned by or licensed to Tele Atlas North America, Inc. The use of this material is subject to the terms of a license agreement. You will be held liable for any unauthorized copying or disclosure of this material.

TC3109254.2s Page A-62

PHYSICAL SETTING SOURCE RECORDS SEARCHED

Cotati City CouncilAugust 27, 2024

Cotati City Council
August 27, 2024