For the retaining wall and soil conditions shown in the Fig. 1, determine the active lateral earth pressures on the retaining wall. Draw the lateral active earth pressure diagrams, and determine the magnitude and location of the lateral active earth force. GL Sand layer 1 y 120 pcf: 30° 4 ft H = 10 ft 6 ft Fig. 1 Sand layer 2 Y 125 pcf; = 36°