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Phase II Limited Subsurface Investigation Proposed Scope of Work November 27, 2017 Country Club Blvd. / 295950 Stockton California Page 2 The Phase II limited subsurface investigation scope of work will include the advancement of six (6) soil borings. Please note that any vehicles, trailers, equipment, or other obstructions will need to be removed from the boring locations in advance by others prior to the scheduled dated of the Phase II field work. The borings will be advanced in the proposed location of the proposed new tower (1 boring) equipment cabinet (2 borings), along the utility easement (3 borings). No borings will be advanced beyond the boundaries of the Subject Property in any type of right-of-way. A direct-push sampling rig will be utilized to advance the soil borings. The boring in the location of the proposed tower will be advanced to a depth of 28 feet or equipment refusal, whichever is encountered first. One groundwater sample (if encountered) and two soil samples will be collected from the boring advanced in the location of the proposed tower. In the event that ground water is encountered, it will be sampled via low-flow methods so as not to artificially increase the concentration of contaminant (especially metals) due to turbidity. One soil sample will be collected from the 0-5 feet bgs interval, with a second discrete soil sample obtained between 5 and 28 feet bgs. The deeper soil sample interval selected for laboratory analysis will be based upon the following: overt evidence of contamination (staining or odors) and/or, location relative to the groundwater interface. For the deep sample, the soil sample across the water table is proposed to be submitted for laboratory analysis. The borings in the locations of the equipment cabinet and utility routes will be advanced to depths of four feet and one composite soil sample will be collected from each boring. The soil/groundwater samples collected will be analyzed for total petroleum hydrocarbons (TPH) full carbon chain via EPA Method 8015, volatile organic compounds (VOCs) via EPA Method 8260, and polycyclic aromatic hydrocarbons (PAHs) via EPA Method 8270. The standard laboratory turnaround time (TAT) is 5 business days. A Phase II Limited Subsurface Investigation Summary Letter, summarizing the subsurface investigation and information obtained therein, will be prepared. The report will present a summary of the investigative methods used, the findings, a table of analytical results, laboratory data sheets and sample chain-of-custody documentation, a boring log, conclusions regarding the presence or absence of a release or threat of release of hazardous materials and/or petroleum products, and recommendations for further actions, if warranted. Attachments: Proposed Boring Location Map RECEIVED DEC 05 2017 ENVIRONMENTAL HEALTH DEPARTNIENT