POWER OF ATTORNEY
Know all by these presents, that the undersigned hereby constitutes and
appoints each of John West, Aaron Tachibana,
James Kitch, Michael Tenta, Peter Mandel, and Kristin Peardon, with full power
of substitution,
signing individually, the undersigned's true and lawful attorneys-in fact and
agents to:
(1) execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer,
director or beneficial owner of more than 10% of a registered class of
securities of Personalis, Inc.,
Forms 3, 4, and 5 (including any amendments thereto), relating to the securities
of Personalis, Inc.,
in accordance with Section 16(a) of the Securities Exchange Act of 1934, as
amended (the "Exchange Act")
and the rules thereunder and a Form ID, Uniform Application for Access Codes to
File on EDGAR;
(2) do and perform any and all acts for and on behalf of the undersigned that
may be necessary or
desirable to execute such Forms 3, 4, or 5, or Form ID (including any amendments
thereto) and timely
file such forms with the United States Securities and Exchange Commission and
any stock exchange
or similar authority; and
(3) take any other action of any nature whatsoever in connection with the
foregoing which,
in the opinion of such attorney-in-fact, may be of benefit, in the best interest
of, or
legally required by, the undersigned, it being understood that the documents
executed by
such attorney-in-fact on behalf of the undersigned pursuant to this Power of
Attorney
shall be in such form and shall contain such terms and conditions as such
attorney-in-fact
may approve in such attorney-in-fact's discretion.
The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might
or could do if personally present, with full power of substitution or
revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's
substitute or substitutes, shall lawfully do or cause to be done by virtue of
this power
of attorney and the rights and powers herein granted. The undersigned
acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned,
are not assuming, nor is Personalis, Inc. assuming, any of the undersigned's
responsibilities
to comply with Section 16 of the Exchange Act.
This Power of Attorney shall remain in full force and effect until the
earliest to
occur of (a) the undersigned is no longer required to file Forms 3, 4 and 5 with
respect
to the undersigned's holdings of and transactions in securities issued by
Personalis, Inc.,
(b) revocation by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact or
(c) as to any attorney-in-fact individually, until such attorney-in-fact is no
longer employed
by Personalis, Inc. or Cooley LLP.
The undersigned has caused this Power of Attorney to be executed as of September
16, 2019.
/s/ Karin Eastham
