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Phase II Subsurface Investigation Proposal 601 North Central Avenue Tracy, California 95376 Partner Proposal Number P22-353833.2 February 16, 2022 Page 13 Partner will perform the following tasks for the Phase II Subsurface Investigation: • Prepare a site-specific health and safety plan; • Notify Underground Service Alert North (USAN) a minimum of three business days prior to drilling activities to clear public utilities; • Secure the necessary drilling permit from the SJCEHD. Permit acquisition will involve submitting a completed application and site plan to the SJCEHD for review and approval and remitting the necessary fees.The turnaround time of the SJCEHD to issue the permit is expected to be no more than two weeks; • Notify the applicable regulatory agencies a minimum of 48 hours prior to drilling/backfilling activities; • Clear boreholes of utility lines through a geophysical survey. Boring placement will be modified as necessary based on the geophysical survey results to avoid damaging underground features. Additionally, to the extent practical based on subsurface lithology, clear boring locations using hand tools; • Advance five borings throughout the subject property to a terminal depth of 5 feet bgs, logging soils continuously for lithologic purposes only from the first boring. No soil samples will be collected for laboratory analysis; • Install a temporary soil gas probe in each boring at 5 feet bgs. The final screening depth at each borehole will be adjusted based on the encountered lithology. In general, probes will be screened within coarser-grained materials and clayey/saturated intervals will be avoided, if possible; • Purge each probe, then collect and prepare up to five soil gas samples for laboratory analysis using laboratory-provided, batch-certified SUMMA canisters and flow controllers with a 5- to 10-minute sample period; • Analyze each soil gas sample (up to five soil gas samples total) for VOCs via EPA Method TO-1 5; and • Compare data to applicable screening criteria, and prepare a report summarizing field activities, methods, and findings. Assumptions Partner has prepared this quotation under the following assumptions: • The work will be performed without regulatory supervision; • Fieldwork will be performed during regular business hours (7:00 a.m. — 5:00 p.m. Monday through Friday, excluding holidays). Additional fees will apply for work conducted outside of regular business hours; • Only the SJCEHD drilling permit will be required to complete this investigation; • Permitting fees will not exceed $1,003. If required, Partner will remit any additional necessary permitting fees on behalf of the Client at cost plus 10% mark-up; • To allow for utility marking per State law, no subterranean work may commence less than a minimum of two business days from receipt of the signed agreement; • A minimum fee of $500 will be assessed for Client-directed cancellation of the project after authorization has been provided; • An additional fee of $2,500 will be assessed for Client-directed cancellation or rescheduling of field activities with less than two business days advanced notice; • Fieldwork will be conducted within the subject property lines on private property. No drilling activities will be performed in the public right-of-way; • There is no surface cover; PARTNER 0.,-F'0©