HydroCon, LLC | 510 Allen St, Suite B | Kelso, WA 98626 | Phone: 360.703.6079 | Fax: 360.703.6086

TECHNICAL MEMORANDUM

To: Mr. Mark Chandler

From: Robert A. Honsberger

Date: May 25, 2016

Subject: Management of Investigation-Derived Waste – TOC Sites: 01-309, 01-323, 01-399, 01-400, and 01-817

HydroCon Environmental, LLC (HydroCon) is submitting this technical memorandum to Time Oil Holdings Company (TOC) to document the management and disposal of investigation-derived waste (IDW) from five properties referenced above. As a result of site investigation activities conducted at the properties, a total of 28 drums (18 Soil and 10 Water) were temporarily stored on the respective sites until proper disposition of the IDW was determined and transportation arrangements were scheduled. A summary of the contents and number of drums removed from each property is provided below:

401 Auburn Way N, Auburn, Washington (TOC Site Number 01-309) – 1 drum of soil and 4 drums of water

301 N Central Ave, Kent, Washington (TOC Site Number 01-323) – 1 drum of soil

19740 Viking Avenue NW, Poulsbo, Washington (TOC Site Number 01-399) – 5 drums of soil and 1 drum water

804 Market St, Kirkland, Washington (TOC Site Number 01-400) – 8 drums of soil and 5 drums of water

714 Avenue D, Snohomish, Washington (TOC Site Number 01-817) – 3 drums of soil.

On April 15, 2016, HydroCon loaded the drums from each site onto a truck and transported them to CEMEX USA (CEMEX) Remediation facility located in Everett, Washington. The soil was treated using thermal desorption and then landfilled. The water was treated and discharged by CEMEX under their industrial waste water discharge permit. A copy of the weigh bills is included as Attachment A.

List of Attachments

Attachment A – CEMEX Weigh Bills

Cc: Mr. Mike Warfel – Ecology, Northwest Region

ATTACHMENT A

CEMEX Weigh Bills

Weighed At: Soil Remediation 1 8 7 6 0 8 6 6 5 2 mm 6 3 G 0 Glenwood Avf

MramCX Everett W A 9 8 2 1 3 Location: 1876 Order: 41059156 Dispatch: 0 ^^J7 04/15/2016 Ship To: 3031722 - TIME OIL CC

P: TOC 01-309 76: 401 AUBURN WAY MORTh AUBURN WA 98092

Instruct: CLASS 3 TO EVERETT SOIL REMEDIATION

01-309 PO: 01-309 HYDROCON ENV 1192517 - CLASS 3 SOIL DUMPED BY DRUM

2298654 - 1876-9,EVERETT SOIL GENERIC

J o b # : Product: Carrier: Vehicle: Tractor / Trallerl / Trailer 2 -/- -/-

Qty: 5.00 piece Welghmaster: CEMEX

Deputy Welghmaster Regan, Angelique S

Scale: 0 In: Out; 8:22 am

C E M E X ' S S T A N D A R D T E R M S A N D

C O N D I T I O N S I N C O R P O R A T E D H E R E I N

- DRIVER ON AT TARE & GROSS — lb ton tne

Gross: 15 900 7.95 7.21 Tare: 22,300 11 15 10 12 Net: -6,400 -3.20 -2 90

* "••'anual Predetermined Tare Today Loads: 1 Today Q ty 5 00 piece

0.00

0,00

S i g n a t u r e o r R e c e i v i n g A g e n t Driv'-r: M E T R I C C O N V E R S I O N F O R M U L A : = j . j ,- i V'DCD B / 2204 622 SriiJNDED TO 2 D'E V.AvS

SEE REVERSE SIDE FOR PRODUCT LABEL iNFORMATIOM

Weighed At: Soil Remediation mm 6300 Glenwood Ave

MfCSmX Everett. WA 98213

1 8 7 6 0 8 6 6 5 3

Location -"O/S

0 Date: 04/15/2016 Order: 41059153 Dispatch: Ship To: 3031722-TIME OiL CO

P: TOC 01-323 76: 301 N. CENTRAL AVE KENT, W A 93030

Instruct: CLASS 3 TO EVERETT SOIL REMEDIATION ENTERPRISE 1

J o b # : 01-323 PO: 01-323 HYDROCON Product: 1 192517 - CLASS 3 SOIL PUMPED BY DRUM Carrier. -Vehicle: 2298654 • 1876.9,EVERETT SOIL GENERIC Tractor / Trallerl / Trailer 7 '- /-

Qty 1.00 piece Welghmaster: CEMEX

Deputy Welghmaster: Regan, Angelique S

Scale: 0 In: Out: 8:23 ani

C E M E X ' ? S T A N D A R D T E R M S A N D

C O N D I T I O N S I N C O R P O R A T E D H E R E I N ,

- DRIVER ON AT TARE & GROSS —

j f O S S Tare: Net:

lb 15 ,900 22.300 -6,400

ton 7.95

11.15 -3.20

tne 7.21

10.12 -2.90

' Manual Predetermined Tare Today Loads 1 Today Oty: 1 00 piece

0.00

0.00

S i g n a t u r e o f R e c e i v i n g A g e n t Driven M E T R I C C O N V E R S I O N F O R M U L A : J-.D::'. V>\D hi i . W <2!. kCWNOeC' '••) 2 D E f VIALS

SEE REVERSE SIDE FOR PRODUCT LABEL INFORMATION

Weighed At: Soii Remediation mm 6300 Gienwood Ave

jnrOSmSX Everett, W A 9 3 2 1 5

1 8 7 6 0 8 6 6 5 1

Location: 1876

Order: 41059154 Dispatch: 0 Ship To: 3031722 - TIME OIL CO

P; TOC 01-399 76: 19740 VIKING AVE, NW POULSBO, WA 93370

instruct: CLASS 3 TO EVERETT SOIL REMEDIATION ENTERPRISE 1

Date: 04/15/2016

j o b # : 01-399 PC: 01-399 HVDROCON ENV Product: 119251? - CLASS 3 SOIL DUMPED BY DRUM Carrier: -Vehicle: 2298654 - 1876-9 EVERETT SOIL GENERIC Tractor / Trallerl / Trailer 2 -/- -/-

Qty; 6,00 piece Welghmaster: CEMEX

Deputy Welghmaster: Regan, Angelique S

Scale: 0 In: Out: 8:18 am

C E M E X ' S S T A N D A R D T E R M S A N D

C O N D I T I O N S I N C O R P O R A T E D H E R E I N .

— DRIVER ON AT TARE & GROSS — lb ton tne

Gross: 15,900 7.95 7.21 Tare: 22,300 11 15 10.12 Net: -6,400 -3.20 -2 90

* Manual Predetermined Tare Today Loads: 1 Today Qty: 6 00 piece

0,00

0.00

s i g n a t u r e o f R e c e i v i n g A g e n . ' Driver: M E T R I C C O N V E R S I O N F O R M U L A : • • C i . r C S D i . ' D g D B r .i2Ci4 6 2 3 K X M I J f D '0 2 D E C I M A L S

SEE REVERSE SIDE FOR PRODUCT LABEL INFORMATION

1 8 7 6 0 8 6 6 5 ?

Location. 1 FJt:

Order; 41059152 Dispatch: 0 Date: 04/15/20:7 Ship To: 3031 722 -T IME OIL CO

P: TOC 01-400 76: 804 MARKET ST KIRKLAND.WA 98033

Instruct: CLASS 3 TO EVERETT SOIL REMEDIATION ENTERPRISE 1

J o b # : 01-400 PO: 01-400 HYDROCON ENV Product: 1192517 - CLASS 3 SOIL DUMPED BY DRUM Carrier: -

Vehicle: 2298654 - 1876-9 EVERETT SOIL GENERIC T r a c t o r / T r a l l e r l / T r a i l e r 2 -'- -/-

Weighed At: Soil Remediation jfrjr 6300 Glenwood Ave

ArCemBX Everett. W A 9 8 2 1 3

Qty: 13.00 piece Welghmaster: CEMEX

Deputy Welghmaster: Regan, Angelique S

Scale: 0 In: Out: 11:14 am

C E M E X S S T A N D A R D T E R M S A N D

C O N D I T I O N S I N C O R P O R A T E D H E R E I N

- DRIVER ON AT TARE & GROSS -

lb ton tne Gross: 16,960 8.48 7.6P Tare: 22,300 11,15 10.12 Net: -5,340 -2,67 -2 42

* Manual Predetermined Tare Today Loads: 1 Today Qty: 13 00 piece

0,00

0.00

S i g n a t u r e o f R e c e i v i n g A g e n t Driver' M E T R I C C O N V E R S I O N F O R M U L A ; P C i L M u S DIViPED BY 2204 623 R'JUNCED TO 2 D E C I M A L S

SEE REVERSE SIDE FOR PRODUCT LABEL INFORMATION

Weighed At: Soil Remediatior mm 6300 Glenwood Ave

i ^ r C E m e X Everett, WA 98213

1 8 7 6 0 8 6 6 5 6

Location: 1876

C Date: 04/15/2016 Order: 41059155 Dispatch: Ship To: 3031722 • TIME OIL CO

P; TOC 01-317 76: 712 714 AVENUE D SNOHOMISH. Vv/A 98290

Instruct: CLASS 3 TO EVERETT SOIL REMEDIATION ENTERPRISE 1

J o b # : 01-817 PO: 01-817 HYDROCON ENV Product: 1192517 - CLASS 3 SO'L DUMPED BY DRUM Carrier:

Vehicle: 2298654 - 1876-9 EVERETT SOIL GENERIC T r a c t o r / T r a l l e r l / T r a i l e r ? -!--!-

Qty: 3.00 piece Welghmaster: CEMEX

Deputy Welghmaster Regan, Angelique S

Scale: 0 In: Out: ' '1.13 am

C E M E X ' S S T A N D A R D T E R M S A N D

C O N D I T I O N S I N C O R P O R A T E D H E R E N

- DRIVER ON AT TARE & GROSS —

Gross Ta^e-Net-

lb 16,960 22,300 -5,340

ton 3,48

11 15 -2 67

tne 7,69

10,12 -2,42

* Manual P'edetermined Tare Today Loads 1 'o JayQtv: 3,00 piece

0.00

0.00

S i g n a t u r e of R e c e i v i n g A g e n t Driver M E T R I C C O N V E R S I O N F O R M U L A : ^-a^iy: L l V " D f I i R,' ~2(ii 523 iLCil.iNDED TC 2 D E C L ' A L L

SEE REVERSE SIDE FOR PRODUCT LABEL INFORMATION