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� r Soil Suitability and Nitrate Loading Evaluation-Update-2 Page 2 of 18 Great Pacific Nut—Nut Processing Facility Expansion 3501 Lehman Road, Tracy, California September 6, 2019 CTE Job#25-071 OG RESPONSE TO COMMENTS FROM SAN JOAQUIN COUNTY EHD Regarding SJCEHD comments related to Percolation test "P-1" which testing was performed on July 19,2019 which established a percolation rate of 16 minutes per inch. • The "P-1" test hole was drilled to 38 inches and test was observed and rate confirmed by a representative from San Joaquin County Environmental Health Department (SJCEHD) on July 19, 2019 as indicated in our report. A permit was issued by SJCEHD for this percolation testing on 4/4/19. • The SJCEHD comments indicate staff documented "P-1" to be located 10-20 north of the two houses. However,the location described by SJCEHD is incorrect the test was actually performed at the proposed originally proposed leach field location as shown on Figure-2 of the attached report. This test location was located and staked by the surveyors and verified using a 100 foot cloth tape in the field to be 65 feet south of the south wall of the proposed bathroom that was staked in the field. If the test had been located as indicated in the SJCEHD comments, it would have been very close to or conflicting with the existing propane tank which extends from 10 to 20 ft north of the main house. It should be noted that field truck being used at the time was parked lengthwise between the test hole and the north end of the propane tank with about 20 feet to spare. • Test "P-1" was originally drilled on April 24, 2019; at that time, a slotted drain pipe (casing), gravel and a cap were installed in the test hole. Unfortunately, the test date was postponed several times owing to heavy rains and conflicts in our scheduling. During the delay in performing the test,the slotted drain pipe and cap were left in the test hole to protect it. When testing was performed on July 19, 2019, no caving had occurred in the test hole and the test was observed and approved by a representative of SJCEHD. A groundwater test hole was also drilled on April 24, 2019, it is now understood that a separate permit should have been obtained for the drilling of that test boring. Regarding SJCEHD comment that indicates "The discussion in the evaluation indicates a percolation test was also performed in "P-1X" on July 19, 2019, but, the data sheet indicated it was conducted April 9, 2019". • Comment appears to be unfounded as shown on page 3 of the August 1, 2019 report under section titled "4.0 FIELD INVESTIGATION" the second sentence clearly states "An inspection was scheduled and percolation testing was performed on April 9, 2019 within test-hole P-IX". The percolation rate obtained from this test was very slow (480 min/inch) and SJCEHD was notified of the failing test by phone call. During the phone conversation SJCEHD indicated that we could cancel the inspection so that we wouldn't need to obtain another permit when a new test location was determined. It should be noted that the failing test SACRAMENTO • FREMONT • MODESTO INSPECTION&TESTING•GEOTECHNICAL•ENVIRONMENTAL-CONSTRUCTION ENGINEERING