Amcol International 8-K Results of Operations and Financial Condition

Exhibit 99.1

AMCOL International Corporation (NYSE: ACO) Reports Second Quarter Results

HOFFMAN ESTATES, IL--(Marketwire - July 22, 2011) - For the second quarter of 2011, AMCOL International Corporation (NYSE: ACO) generated diluted earnings per share attributable to its shareholders of $0.43 per share versus $0.51 per share in the prior year's quarter.

Net sales increased 13.6% to $250.8 million for the quarter ended June 30, 2011, as compared to $220.7 million for the 2010 period. Gross profits increased 3.3% while gross margins decreased from 27.5% to 25.0%. Operating profit decreased 6.8% to $22.1 million. The increase in our effective tax rate from 25.4% in the second quarter of 2010 to 30.1% in the 2011 quarter comprised $0.03 of the $0.08 decrease in diluted earnings per share attributable to our shareholders.

Fluctuations in foreign exchange rates accounted for 24.5% of the increase in sales, and helped offset more than one third of the organic decrease in operating profits. During the current quarter, our start-up chrome sand operations experienced net losses of $0.03 per diluted share. For the remainder of fiscal 2011, we expect our chrome sand operations to generate net losses of between $0.08 to $0.12 per diluted share; this excludes an estimated $0.05 per diluted share benefit resulting from a contingent gain we will record in Q3 associated with our chrome sand mining costs.

"Although sales for the quarter were in line with our expectations, our gross margins deteriorated in each of our three major business segments and led to our disappointing earnings in Q2," said Ryan McKendrick, AMCOL President and Chief Executive Officer.

"The Minerals and Materials segment experienced good revenue growth. But gross margins decreased in our chrome sand business, our Asia operations, and our domestic operations, all of which contributed to the 3.2 percentage point decrease in margins for the segment as compared to Q2 2010. Our domestic operations experienced production cost increases, mostly related to fuel and labor costs. Our chrome sand business will continue to present challenges for the balance of the year as we upgrade our plant to improve throughput and product yields. Rapidly rising costs in Asia have not yet been fully offset by price increases, especially in Thailand and South Korea where margins have dropped by almost four percentage points as compared to the prior year's quarter. Our pet products business has been negatively impacted by reduced demand for both bulk as well as packaged products from large private label customers.

AMCOL International Corporation

Q2 2011 Earnings Release - July 22, 2011

Page 2 of 12

Our domestic metalcasting business -- our largest business unit -- continues to perform well, maintaining gross margins despite rising costs," continued McKendrick.

"The Environmental segment generated 25% sales growth over Q2 2010. We were disappointed in the more than 3 percentage point decrease in gross margins as compared to the prior year's quarter though. We experienced cost increases in Europe and are implementing plans to increase our margins in this geographic market. Although our U.S. based contracting services business had strong sales growth, the business overall continues to generate less than desired gross profits. Controlling SG&A costs remains an area of focus in this segment overall," McKendrick added.

McKendrick continued, "The Oilfield Services segment also experienced revenue growth consistent with our expectations. Its sales mix, however, negatively impacted gross margins. Revenues from high margin, offshore services in the Gulf of Mexico ('GOM'), including our flagship filtration services, decreased as compared to the prior year's quarter, leading to an overall 4.1 percentage point decrease in gross margins for the segment. We see no indication that deep water activity will increase in the GOM over the next couple of quarters."

"The outlook for many of the major business units within our segments remains positive, but several areas will continue to present challenges. Demand in our metalcasting markets is expected to remain strong in the U.S. and Asia due to strong automotive and heavy equipment production. Our Building Materials group within the Environmental segment is continuing profitable growth despite relatively soft market conditions for non-residential construction primarily due to successful new product introductions. However, competition in the Lining Technologies area is limiting our ability to improve margin through pricing. Although our Oilfield Services' gross margins will continue to be impacted by the decline in deep water activity in the GOM, we are working hard to improve margins in other service offerings within this segment. Gross margin improvement will be the area of strong focus across all segments," he concluded.

STATEMENT OF OPERATIONS HIGHLIGHTS:

The statement of operations highlights are supported by the quarterly segment results schedules included in this press release. The following comments relate to our results for the current quarter as compared to the second quarter of 2010, unless otherwise noted.

Net sales: Net sales increased $30.1 million or 13.6%.

Minerals & Materials: The majority of the revenue improvement was due to increased volumes, principally in our domestic and Asian metalcasting markets, and our relatively new chrome sand product offerings. These markets continue to experience an increase in demand for automobile and heavy equipment castings. In addition, approximately 22%

AMCOL International Corporation

Q2 2011 Earnings Release - July 22, 2011

Page 3 of 12

of the increase in net sales was driven by favorable fluctuation in foreign currency exchange rates.

Environmental: This segment continues to see an increase in demand that is more pronounced given the depressed economic environment that existed during the prior year's period. The total increase in revenues was $16.1 million, or 24.6%. Approximately 80.2% of the increase in this segment's sales is attributable to organic growth with the remainder related to favorable fluctuations in foreign currency exchange rates. The increase occurred mostly in our domestic contracting services business and our European operations. Our domestic contracting services' prior year's results were heavily affected by the recession underway at that time, making comparisons to that period somewhat irrelevant for this business. Our European business continues to grow organically due to growing economies in Eastern Europe, new sales representation in certain geographic markets, and increased contracting services revenues.

Oilfield Services: The growth in revenues occurred primarily in our domestic businesses as several of our businesses, especially our coil tubing services, continue to benefit from increased demand in the Texas shale regions. Our pipeline services also experienced increased demand as high oil prices increase our customers' maintenance needs. Our domestic filtration revenues suffered significantly this quarter due to depressed offshore activity resulting from the low amount of drilling permits being issued in the GOM. Regarding our foreign operations, revenues in Australia decreased (due to a large customer contract that ended in Q3 2010) while all other foreign businesses experienced revenue growth.

Transportation: Nearly all of the revenue increase was due to increased fuel-surcharges. This segment continues to see an increase in services being provided to divisions with our other subsidiaries, principally our metalcasting and pet products groups; these intercompany revenues are eliminated in the corporate segment.

Gross profit: Gross profit increased $2.0 million, or 3.3%. Gross margins, however, decreased across all segments as discussed below.

Minerals & Materials: Gross profit decreased slightly but gross margins decreased 320 basis points to 22.5%. The decreased margins occurred in Asia and our domestic business, which experienced increased manufacturing costs, and in our start-up chrome sand operations in South Africa. We continue to focus on improving our chrome sand operations, which began late in the second quarter of 2010.

Environmental: Gross profit increased $2.5 million, or 12.2%, from the 2010 quarter. The increase in gross profit was derived largely from the increased sales levels as previously mentioned. Gross margins, however, decreased 310 basis points to 27.8%. The decrease in margins occurred due to a change in product mix as well as increased production costs and raw material costs.

AMCOL International Corporation

Q2 2011 Earnings Release - July 22, 2011

Page 4 of 12

Oilfield Services: Gross profit decreased due to the 410 basis point decrease in gross margins derived from a change in our sales mix. Although revenues increased, the increases were concentrated in onshore as opposed to offshore work. This shift decreased profitability as offshore work is more profitable. Gross margins in our international business also decreased due to the completion of a large job in Australia in Q3 2010.

Selling, general and administrative expenses (SG&A): The 9.8% increase in SG&A expenses was driven mostly by increases in our Minerals & Materials and Environmental segments with 28.6% of the increase arising from unfavorable changes in foreign currency exchange rates. The organic increase resulted primarily from increased employee and employee related expenses.

Income tax expense: Our income tax expense increased due to an increase in our effective tax rate, which increased due to our expectation that our foreign operations will generate less of our total 2011 pre-tax income than previously anticipated.

FINANCIAL POSITION AND CASH FLOW HIGHLIGHTS:

Long-term debt increased slightly to $240.5 million since our prior year-end, and we reduced our cash balance by $9.3 million to $17.9 million during that time. Long-term debt as a percentage of total capitalization was 36.7% at June 30, 2011 as compared to 37.1% at December 31, 2010. Since the prior year-end, we have increased our non-cash working capital by $30.7 million due to growth we've had in 2011.

Cash flow generated from operating activities was $13.8 million through the first six months of 2011 as compared to $6.9 million in the prior year period. The increase results from greater income and non-cash charges.

Capital expenditures for the six months ending June 30, 2011 were $24.8 million as compared to $25.9 million in the prior year's period. In each of these periods, expenditures associated with our start-up chrome sand operations were $2.8 million and $13.4 million, respectively. In the six months ending June 30, 2011, the majority of our capital spending occurred in our Oilfield Services segment and our Minerals and Materials segment.

Dividends through June 30, 2011 remained roughly the same over the prior year period as our dividend per share has remained constant at $0.18 per quarter per share.

AMCOL International Corporation

Q2 2011 Earnings Release - July 22, 2011

Page 5 of 12

This release should be read in conjunction with the attached unaudited, condensed, consolidated financial statements. It contains certain forward-looking statements regarding AMCOL's expected performance for future periods and actual results for such periods might materially differ. Such forward-looking statements are subject to uncertainties, which include, but are not limited to, actual growth in AMCOL's various markets, utilization of AMCOL's plants, currency exchange rates, currency devaluation, delays in development, production and marketing of new products, integration of acquired businesses, and other factors detailed from time to time in AMCOL's annual report and other reports filed with the Securities and Exchange Commission. AMCOL undertakes no duty to update any forward-looking statement to conform the statement to actual results or changes in AMCOL's expectations.

AMCOL International, headquartered in Hoffman Estates, IL, develops and markets a wide range of mineral and technology based products and services for use in various industrial, environmental and consumer applications. AMCOL is the parent company of American Colloid Company, CETCO (Colloid Environmental Technologies Company), CETCO Oilfield Services Company and the transportation operations, Ameri-co Carriers, Inc. and Ameri-co Logistics, Inc. AMCOL's common stock is traded on the New York Stock Exchange under the symbol ACO. AMCOL's web address is www.amcol.com. AMCOL's quarterly quarter conference call will be available live today at 11 a.m. ET on the AMCOL website via webcast or by dialing 1.877.718.5092.

Financial tables follow.

AMCOL INTERNATIONAL CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(unaudited)
(In thousands, except per share data)
	Six Months Ended						Three Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Net sales	$	473,248		$	395,664		$	250,833		$	220,713
Cost of sales		352,334			290,342			188,039			159,938
Gross profit		120,914			105,322			62,794			60,775
General, selling and administrative expenses		80,214			70,818			40,664			37,031
Operating profit		40,700			34,504			22,130			23,744
Other income (expense):
Interest expense, net		(5,484	)		(4,550	)		(2,802	)		(2,334	)
Other, net		113			(117	)		489			330
		(5,371	)		(4,667	)		(2,313	)		(2,004	)
Income before income taxes and income (loss) from affiliates and joint ventures		35,329			29,837			19,817			21,740
Income tax expense		10,331			7,701			5,966			5,519
Income before income (loss) from affiliates and joint ventures		24,998			22,136			13,851			16,221
Income (loss) from affiliates and joint ventures		996			(71	)		(93	)		20
Net income (loss)		25,994			22,065			13,758			16,241
Net income (loss) attributable to noncontrolling interests		4			(212	)		3			92
Net income (loss) attributable to AMCOL shareholders	$	25,990		$	22,277		$	13,755		$	16,149
Weighted average common shares outstanding		31,611			31,092			31,706			31,141
Weighted average common and common equivalent shares outstanding		32,099			31,467			32,206			31,515
Basic earnings per share attributable to AMCOL shareholders	$	0.82		$	0.72		$	0.43		$	0.52
Diluted earnings per share attributable to AMCOL shareholders	$	0.81		$	0.71		$	0.43		$	0.51
Dividends declared per share	$	0.36		$	0.36		$	0.18		$	0.18

AMCOL INTERNATIONAL CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
(In thousands)
ASSETS	June 30,			December 31,
	2011			2010
	(unaudited)				*
Current assets:
Cash and equivalents	$	17,928		$	27,262
Accounts receivable, net		228,525			193,968
Inventories		120,279			107,515
Prepaid expenses		18,297			12,581
Deferred income taxes		5,668			5,553
Income tax receivable		12,810			8,474
Other		336			6,211
Total current assets		403,843			361,564
Noncurrent assets:
Property, plant, equipment, mineral rights and reserves:
Land		11,237			11,591
Mineral rights		49,140			51,435
Depreciable assets		477,513			454,351
		537,890			517,377
Less: accumulated depreciation and depletion		273,528			256,889
		264,362			260,488
Goodwill		71,729			70,909
Intangible assets, net		39,259			42,590
Investments in and advances to affiliates and joint ventures		22,580			19,056
Available-for-sale securities		6,552			14,168
Deferred income taxes		5,898			7,570
Other assets		24,418			22,748
Total noncurrent assets		434,798			437,529
Total Assets	$	838,641		$	799,093
LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
Accounts payable	$	61,279		$	53,167
Accrued liabilities		72,120			59,308
Total current liabilities		133,399			112,475
Noncurrent liabilities:
Long-term debt		240,532			236,171
Pension liabilities		21,738			21,338
Deferred compensation		9,547			8,686
Other long-term liabilities		19,035			19,987
Total noncurrent liabilities		290,852			286,182
Shareholders' Equity:
Common stock		320			320
Additional paid in capital		91,364			95,074
Retained earnings		297,828			283,189
Accumulated other comprehensive income		24,398			28,936
Less: Treasury stock		(4,380	)		(8,945	)
Total AMCOL shareholders' equity		409,530			398,574
Noncontrolling interest		4,860			1,862
Total equity		414,390			400,436
Total Liabilities and Shareholders' Equity	$	838,641		$	799,093
* Condensed from audited financial statements.

AMCOL INTERNATIONAL CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)
(In thousands)
	Six Months Ended
	June 30,
	2011			2010
Cash flow from operating activities:
Net income	$	25,994		$	22,065
Adjustments to reconcile net income to net cash
provided by (used in) operating activities:
Depreciation, depletion, and amortization		19,731			17,022
Other non-cash charges		2,891			3,655
Changes in assets and liabilities, net of effects of acquisitions:
Decrease (increase) in current assets		(57,469	)		(49,570	)
Decrease (increase) in noncurrent assets		(843	)		(1,832	)
Increase (decrease) in current liabilities		22,016			14,667
Increase (decrease) in noncurrent liabilities		1,528			843
Net cash provided by (used in) operating activities		13,848			6,850
Cash flow from investing activities:
Capital expenditures		(24,800	)		(25,939	)
Investments in and advances to affiliates and joint ventures		(1,276	)		(1,985	)
Other		1,718			1,493
Net cash (used in) investing activities		(24,358	)		(26,431	)
Cash flow from financing activities:
Net change in outstanding debt		4,530			17,808
Proceeds from sales of treasury stock		6,619			2,904
Dividends		(11,351	)		(11,149	)
Excess tax benefits from stock-based compensation		651			164
Net cash provided by (used in) financing activities		449			9,727
Effect of foreign currency rate changes on cash		727			(779	)
Net increase (decrease) in cash and cash equivalents		(9,334	)		(10,633	)
Cash and cash equivalents at beginning of period		27,262			27,669
Cash and cash equivalents at end of period	$	17,928		$	17,036

AMCOL INTERNATIONAL CORPORATION
SEGMENT RESULTS (unaudited)
QUARTER-TO-DATE
Minerals and Materials	Three Months Ended June 30,
	2011				2010				2011 vs. 2010
	(Dollars in Thousands)
Net sales	$	119,851	100.0	%	$	106,397	100.0	%	$	13,454		12.6	%
Cost of sales		92,862	77.5	%		79,057	74.3	%		13,805		17.5	%
Gross profit		26,989	22.5	%		27,340	25.7	%		(351	)	-1.3	%
General, selling and
administrative expenses		12,290	10.3	%		11,014	10.4	%		1,276		11.6	%
Operating profit		14,699	12.2	%		16,326	15.3	%		(1,627	)	-10.0	%

	Three Months Ended June 30,
Environmental	2011				2010				2011 vs. 2010
	(Dollars in Thousands)
Net sales	$	81,220	100.0	%	$	65,159	100.0	%	$	16,061	24.6	%
Cost of sales		58,642	72.2	%		45,037	69.1	%		13,605	30.2	%
Gross profit		22,578	27.8	%		20,122	30.9	%		2,456	12.2	%
General, selling and
administrative expenses		14,359	17.7	%		12,108	18.6	%		2,251	18.6	%
Operating profit		8,219	10.1	%		8,014	12.3	%		205	2.6	%

	Three Months Ended June 30,
Oilfield Services	2011				2010				2011 vs. 2010
	(Dollars in Thousands)
Net sales	$	44,837	100.0	%	$	39,644	100.0	%	$	5,193		13.1	%
Cost of sales		33,372	74.4	%		27,874	70.3	%		5,498		19.7	%
Gross profit		11,465	25.6	%		11,770	29.7	%		(305	)	-2.6	%
General, selling and
administrative expenses		8,042	17.9	%		7,217	18.2	%		825		11.4	%
Operating profit		3,423	7.7	%		4,553	11.5	%		(1,130	)	-24.8	%

	Three Months Ended June 30,
Transportation	2011				2010				2011 vs. 2010
	(Dollars in Thousands)
Net sales	$	14,780	100.0	%	$	13,583	100.0	%	$	1,197		8.8	%
Cost of sales		13,140	88.9	%		12,040	88.6	%		1,100		9.1	%
Gross profit		1,640	11.1	%		1,543	11.4	%		97		6.3	%
General, selling and
administrative expenses		955	6.5	%		844	6.2	%		111		13.2	%
Operating profit		685	4.6	%		699	5.1	%		(14	)	-2.0	%

	Three Months Ended June 30,
Corporate	2011			2010			2011 vs. 2010
	(Dollars in Thousands)
Intersegment shipping sales	$	(9,855	)	$	(4,070	)	$	(5,785	)
Intersegment shipping costs		(9,977	)		(4,070	)		(5,907	)
Gross profit (loss)		122			-			122
General, selling and
administrative expenses		5,018			5,848			(830	)	-14.2	%
Operating loss		(4,896	)		(5,848	)		952		-16.3	%

AMCOL INTERNATIONAL CORPORATION
SEGMENT RESULTS (unaudited)
YEAR-TO-DATE
Minerals and Materials	Six Months Ended June 30,
	2011				2010				2011 vs. 2010
	(Dollars in Thousands)
Net sales	$	236,731	100.0	%	$	204,085	100.0	%	$	32,646	16.0	%
Cost of sales		181,281	76.6	%		152,535	74.7	%		28,746	18.8	%
Gross profit		55,450	23.4	%		51,550	25.3	%		3,900	7.6	%
General, selling and
administrative expenses		24,580	10.4	%		20,918	10.2	%		3,662	17.5	%
Operating profit		30,870	13.0	%		30,632	15.1	%		238	0.8	%

	Six Months Ended June 30,
Environmental	2011				2010				2011 vs. 2010
	(Dollars in Thousands)
Net sales	$	136,553	100.0	%	$	103,334	100.0	%	$	33,219	32.1	%
Cost of sales		97,919	71.7	%		72,216	69.9	%		25,703	35.6	%
Gross profit		38,634	28.3	%		31,118	30.1	%		7,516	24.2	%
General, selling and
administrative expenses		28,132	20.6	%		23,321	22.6	%		4,811	20.6	%
Operating profit (loss)		10,502	7.7	%		7,797	7.5	%		2,705	34.7	%

	Six Months Ended June 30,
Oilfield Services	2011				2010				2011 vs. 2010
	(Dollars in Thousands)
Net sales	$	89,581	100.0	%	$	69,848	100.0	%	$	19,733	28.3	%
Cost of sales		65,452	73.1	%		50,064	71.7	%		15,388	30.7	%
Gross profit		24,129	26.9	%		19,784	28.3	%		4,345	22.0	%
General, selling and
administrative expenses		15,834	17.7	%		14,003	20.0	%		1,831	13.1	%
Operating profit		8,295	9.2	%		5,781	8.3	%		2,514	43.5	%

	Six Months Ended June 30,
Transportation	2011				2010				2011 vs. 2010
	(Dollars in Thousands)
Net sales	$	27,454	100.0	%	$	25,703	100.0	%	$	1,751		6.8	%
Cost of sales		24,411	88.9	%		22,833	88.8	%		1,578		6.9	%
Gross profit		3,043	11.1	%		2,870	11.2	%		173		6.0	%
General, selling and
administrative expenses		1,893	6.9	%		1,660	6.5	%		233		14.0	%
Operating profit		1,150	4.2	%		1,210	4.7	%		(60	)	-5.0	%

	Six Months Ended June 30,
Corporate	2011			2010			2011 vs. 2010
	(Dollars in Thousands)
Intersegment sales	$	(17,071	)	$	(7,306	)	$	(9,765	)
Intersegment cost of sales		(16,729	)		(7,306	)		(9,423	)
Gross profit (loss)		(342	)		-			(342	)
General, selling and
administrative expenses		9,775			10,916			(1,141	)	-10.5	%
Operating loss		(10,117	)		(10,916	)		799		-7.3	%

AMCOL INTERNATIONAL CORPORATION
SUPPLEMENTARY INFORMATION (unaudited)
QUARTER-TO-DATE
Composition of Sales by Geographic Region	Three Months Ended June 30, 2011
	Americas			EMEA			Asia Pacific			Total
Minerals & Materials		28.1	%		8.7	%		10.4	%		47.2	%
Environmental		15.7	%		14.5	%		1.9	%		32.1	%
Oilfield Services		15.4	%		0.9	%		1.4	%		17.7	%
Transportation		3.0	%		0.0	%		0.0	%		3.0	%
Total - current year's period		62.2	%		24.1	%		13.7	%		100.0	%
Total from prior year's comparable period		64.8	%		21.2	%		14.0	%		100.0	%
Percentage of Revenue Growth by Component
	Three Months Ended June 30, 2011 vs.
	Three Months Ended June 30, 2010
	Base						Currency
	Business			Acquisitions			Translation			Total
Minerals & Materials		4.7	%		0.0	%		1.4	%		6.1	%
Environmental		5.9	%		0.0	%		1.4	%		7.3	%
Oilfield Services		1.9	%		0.0	%		0.5	%		2.4	%
Transportation		-2.1	%		0.0	%		0.0	%		-2.1	%
Total		10.4	%		0.0	%		3.3	%		13.7	%
% of growth		75.5	%		0.0	%		24.5	%		100.0	%
Minerals and Materials Product Line Sales	Three Months Ended June 30,
		2011			2010		% change
	(Dollars in Thousands)
Metalcasting	$	64,686		$	49,857			29.7	%
Specialty materials		26,015			27,055			-3.8	%
Pet products		12,998			14,453			-10.1	%
Basic minerals		11,498			13,429			-14.4	%
Other product lines		4,654			1,603			190.3	%
Total		119,851			106,397			12.6	%
Environmental Product Line Sales	Three Months Ended June 30,
		2011			2010		% change
	(Dollars in Thousands)
Lining technologies	$	32,621		$	35,022			-6.9	%
Building materials		21,159			13,540			56.3	%
Contracting services		18,980			10,425			82.1	%
Drilling products		8,460			6,172			37.1	%
Total		81,220			65,159			24.6	%

AMCOL INTERNATIONAL CORPORATION
SUPPLEMENTARY INFORMATION (unaudited)
YEAR-TO-DATE
Composition of Sales by Geographic Region	Six Months Ended June 30, 2011
	Americas			EMEA			Asia Pacific			Total
Minerals and materials		29.3	%		9.7	%		10.6	%		49.6	%
Environmental		14.2	%		12.6	%		1.6	%		28.4	%
Oilfield services		17.0	%		0.8	%		1.2	%		19.0	%
Transportation		3.0	%		0.0	%		0.0	%		3.0	%
Total - current year's period		63.5	%		23.1	%		13.4	%		100.0	%
Total from prior year's comparable period		65.0	%		20.5	%		14.5	%		100.0	%
Percentage of Revenue Growth by Component
	Six Months Ended June 30, 2011
	vs.
	Six Months Ended June 30, 2010
							Foreign
	Organic			Acquisitions			Exchange			Total
Minerals and materials		7.2	%		0.0	%		1.1	%		8.3	%
Environmental		7.2	%		0.2	%		1.0	%		8.4	%
Oilfield services		4.6	%		0.0	%		0.4	%		5.0	%
Transportation		-2.0	%		0.0	%		0.0	%		-2.0	%
Total		17.0	%		0.2	%		2.5	%		19.7	%
% of growth		86.4	%		1.0	%		12.6	%		100.0	%
Minerals and Materials Product Line Sales	Six Months Ended June 30,
		2011			2010		% change
	(Dollars in Thousands)
Metalcasting	$	124,838		$	94,197			32.5	%
Specialty materials		52,036			52,863			-1.6	%
Pet products		28,069			30,891			-9.1	%
Basic minerals		23,040			22,775			1.2	%
Other product lines		8,748			3,359			160.4	%
Total		236,731			204,085			16.0	%
Environmental Product Line Sales	Six Months Ended June 30,
		2011			2010		% change
	(Dollars in Thousands)
Lining technologies	$	53,725		$	51,587			4.1	%
Building materials		38,215			26,041			46.7	%
Contracting services		30,210			14,639			106.4	%
Drilling products		14,403			11,067			30.1	%
Total		136,553			103,334			32.1	%

For further information, contact:                                                      

Don Pearson

Vice President & Chief Financial Officer

847.851.1500