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H 6216 Main Avenue,Suite A <br /> HUNTER SURVEYING, INC. Orangevale, CA 95662 <br /> I Phone (916) 988-5600 <br /> Fax (916) 988-5688 <br /> 18 August 2003 <br /> Shaw Environmental & Infrastructure, Inc. <br /> 4005 Port Chicago Highway <br /> Concord, CA 94520-1120 <br /> Attn Rob Delnagro <br /> Re Pacific Bell Site - 10 East 12th Street, Tracy, CA - Monitoring Well Survey <br /> The following monitoring wells were horizontally located by GPS-RTK observations and <br /> conventional total station methods, and vertically surveyed by digital leveling survey methods on <br /> August 12, 2003 <br /> NAD83 Geodetic NAD83 Geodetic CCS83 Zone 3 NAVD88 Elevations <br /> PT ID Lat(DD) North 1 Lat(DMS) North 1 North 1 PVC Rim Grind <br /> Long (DD)West Long (DMS)West East <br /> MW-01 37 74057697 37 44 26 07708 20934460 49 60 49 88 49 8 <br /> 121 42547734 121 25 31 79842 62940643 <br /> MW-02 37 74052632 37 44 25 89476 20934272 49 21 49 56 49 5 <br /> 121 42535333 12125 31 27199 62941000 <br /> MW-03 37 7403 8763 37 44 25 39545 20933768 49 80 50 10 50 0 <br /> 121 42536988 12125 31 33155 62940947 <br /> Basis of Coordinates and Elevation: <br /> NAD83 Horizontal Feet Coordinates, CCS83 Zone 3, (epoch date 1997 30), established by GPS- <br /> RTK observations based on NGS Control Station F 192 RESET 1939 (PID HS0455) <br /> Site locations performed by total station survey methods <br /> NAVD88 Vertical Feet Elevations established by digital level loops based on NGS Benchmark <br /> TRACYRM2 (PID HS0178), elev=48 70', and TRACY(PID HS0175), elev= 50 2' <br /> o ES L yYy�rFE�� <br /> Jam L White a- <br /> 7722 E <br /> is 71 <br /> 9�0r 0l��1 Q� <br />