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September 15,2014 Page 2 of 5 Reference: Site Assessment Report clearing and sampling activities were performed by National Exploration Wells and Pumps ("National EWP") under the supervision of Stantec and a California Professional Geologist. DRILLING AND SOIL AND GROUNDWATER SAMPLING California USA North (81 1) was notified prior to commencing drilling to identify public utilities in conflict with the proposed boring locations. In addition, Stantec conducted a private utility search with Cruz Brothers Locators to identify utilities at the Site that were in potential conflict with the proposed boring locations. Soil borings BA-1 through BA-3 were cleared to a depth of eight feet one inch bgs using an air knife/vacuum extraction device. Soil boring BA-3 was originally proposed to be advanced near the existing fuel dispensers, but was relocated to the northwest due to the presence of an underground utility line. For each boring, soil samples were collected at a depth of 5 feet bgs using a hand auger. Once the bucket of the hand auger reached the sampling depth, the hand auger was removed from the boring and brass sleeves were used to hold soil samples from the hand auger. Soil borings BA-1 through BA-3 were advanced with a hollow stem auger drilling rig using an 8 inch auger bit. This sampling technique uses a hydraulic hammer to advance the sampler. Soil samples were collected using a steel split-spoon sampler driven approximately 24 inches using a 140 pound hammer dropped from a height of 30 inches. Collected soils were visually examined by field personnel and classified in accordance with the Unified Soils Classification System ("USCS"). A field photo-ionization detector ("PID") was also used to monitor the soils collected for volatile organic compound ("VOC") vapors. A summary of the USCS classifications and VOC vapor readings are presented with boring logs included as Attachment 2. Select soil samples were submitted to the laboratory for analysis. When groundwater was encountered during drilling, each boring was advanced approximately five feet below the first encountered groundwater and a temporary well was installed with 10 feet of slotted PVC screen. The temporary well was left undisturbed between 10 to 20 minutes to allow groundwater to enter the well casing. A disposable bailer was then used to retrieve groundwater which was collected laboratory provided containers. Soil and groundwater samples were placed in an ice-filled cooler for delivery under chain of custody ("COC") protocol to the laboratory. BORING ABANDONMENT Upon obtaining the necessary soil samples from each of the soil borings, the borings were abandoned and finished flush with existing surface grade (from bottom of boring to 10-inches bgs with neat cement grout via tremie pipe and a 10-inch concrete cap). Design with community In mind