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7/28/2019 IR_17-2_10-15-07
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7/28/2019 IR_17-2_10-15-07
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7/28/2019 IR_17-2_10-15-07
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http://www.documents.dgs.ca.gov/dsa/lea/DSA-292.pdfhttp://www.documents.dgs.ca.gov/dsa/lea/ultrasonic_dsa_210.pdf